Online Code Compiler and Judging System | Source Code, UML diagrams, Project Report

Online Code Compiler and Judging System is one of the most common software development projects today. In this article, we are going to develop the Online Code Compiler and Judging System software development project from scratch for final year students. We will be covering all the steps you need to follow while developing this project.

How to create a Online Code Compiler and Judging System Project?

A Project Development is a multiphase process in which each and every process are equally important. Here in this post we are also going to develop our Online Code Compiler and Judging System in multiple phases, such as:

1. Team Formation
2. Topic Selection
3. Creating Project Synopsys
4. Requirement Gathering
5. Coding or Implementation
6. Testing
7. Project Presentation
8. Writing a Research Paper

Let us look into the steps one by one.

Step 1- Team Formation Phase: Creating a Dynamic Team

Team formation for a final year project is a crucial aspect that can significantly impact the success and efficiency of the project. In the final year, students often have diverse academic backgrounds, skills, and interests. Therefore, forming a well-balanced team becomes essential to leverage the strengths of each member and address any potential weaknesses.

In Our project as we will be exploring about web application for Online Code Compiler and Judging System so we will be required below skill sets.

1. Front end Developer
2. Back end Developer
3. Tester
4. Devops Developer

Step 2- Topic Selection

While making our Online Code Compiler and Judging System this will be our second step in which we will find an interesting problem statement and try to generate an idea to solve that problem using our knowledge.

Choose a topic related to your field of study that is of great interest to you. It is advised that you pick a topic that has a powerful motive. For instance, a project that helps humankind will truly be unmatched. Another factor to keep in mind is to choose topics that aren’t very common. 

You Can Pick some of the unique Software Development Ideas from Top 50 Software Development Ideas for Beginners article.

• Topic Planning: In this phase team will gather and try to search a topic or problem statement by brainstorming , reverse thinking or any other strategy and select a problem which is challenging in nature and solvable by using their combined knowledge of tech.
• Defining & Set Objective: After planning the problem statement we will define clear problem statement and its objectives.

Result : In the end of this phase we will be having a problem statement for our project.

In our example we are selecting the topic ”Online Code Compiler and Judging System” .

After the selection of the topic we are going to start our project work in the following steps:

Step 3- Synopsys for Online Code Compiler and Judging System Project

A project synopsis serves as a concise overview or summary of a proposed project, offering a brief but comprehensive insight into its objectives, scope, methodology, and expected outcomes. It typically acts as a preliminary document, providing supervisors, or evaluators with a quick understanding of the project before they delve into more detailed.

The project synopsis usually includes key elements such as the project title, problem statement or context, objectives, scope and limitations, methodology or approach, expected outcomes, and the significance of the project in the broader context. It serves as a roadmap, guiding readers through the fundamental aspects of the project and helping them grasp its purpose and potential impact.

Below are some of the points we have to cover in the synopsis report :

• Project Title
• Introduction of Project
  • Problem Statement
  • Proposed Solution
  • Objective of the Project
  • Scope of the Project
• Methodologies used
  • ER Model
  • Use case Diagram
  • Dataflow Diagram
• Features of the project
  • For Users
  • For Admin
• Impact of the project
• Limitations of the project
• Future scope of the project

Let’s create a Synopsys Report for Online Code Compiler and Judging System Project:

3.1 Introduction | Synopsys for Online Code Compiler and Judging System

An Online Code Compiler and Judging System (OCCJS) is a software application that streamlines and automates the process of compiling, running, and judging code submissions. It is a comprehensive system designed to manage tasks such as code execution, result evaluation, user management, and contest organization. The primary objective of an OCCJS is to facilitate efficient code compilation and evaluation, making it easier for users to practice coding, participate in competitions, and receive instant feedback, thereby creating a seamless and user-friendly experience.

3.1.1 Problem Statement for Online Code Compiler and Judging System

Traditional coding platforms face challenges in providing seamless code compilation and evaluation due to outdated systems and limited language support. Issues such as slow compilation times, lack of real-time feedback, and inadequate user management hinder the effectiveness of coding competitions and practice environments. To address these gaps, a modern Online Code Compiler and Judging System is needed with an intuitive interface, multi-language support, real-time compilation, and comprehensive evaluation tools. This will enhance the user experience, improve coding efficiency, and foster a more interactive and productive coding community in the digital era.

3.1.2 Proposed Solution for Library management system Project :

To address the challenges faced by traditional coding platforms, we are developing a web-based Online Code Compiler and Judging System using the MERN stack (MongoDB, Express.js, React, and Node.js). Our solution will provide a user-friendly interface for easy navigation, support for multiple programming languages, real-time code compilation, and comprehensive evaluation tools.

3.1.3 Objective of the Project:

The objective of the Online Code Compiler and Judging System (OCCJS) project is to design and implement an efficient and user-friendly platform that automates the various tasks associated with code compilation and evaluation.

The primary goals of the project include:

• Efficient Code Management: Streamlining the process of code submission, compilation, and evaluation to ensure a smooth and reliable coding experience.
• User-Friendly Interface: Developing an intuitive and user-friendly interface for both users and administrators to facilitate easy navigation, quick retrieval of results, and seamless interaction with the system.
• Automation of Processes: Automating routine tasks such as code compilation, test case execution, and result generation to improve operational efficiency and reduce manual workload.
• Multi-language Support: Implementing support for multiple programming languages such as C++, Java, Python, and more, allowing users to code in their preferred language.
• Real-time Feedback: Providing real-time feedback on code submissions, enabling users to quickly identify and correct errors, thereby enhancing the learning experience.
• User Account Management: Providing features for users to create accounts, track their coding history, and manage personal preferences, fostering a personalized and user-centric coding environment.
• Automated Judging: Incorporating automated judging tools to evaluate code based on predefined test cases, ensuring fair and accurate assessment.
• Reporting and Analytics: Incorporating reporting tools to generate insights into user performance, popular languages, and common errors, enabling informed decision-making for administrators.
• Security and Access Control: Implementing robust security measures to protect sensitive user data and incorporating access controls to ensure that only authorized personnel have access to specific functionalities.
• Integration with Other Systems: Offering the flexibility for integration with other educational or administrative systems to create a cohesive and interconnected information ecosystem within the institution.
• Scalability: Designing the system to be scalable, allowing for easy expansion and adaptation to the evolving needs of the platform as it grows over time.

By achieving these objectives, the Online Code Compiler and Judging System project aims to enhance the overall efficiency, accessibility, and user satisfaction of coding platforms, ultimately contributing to an enriched learning and competitive coding environment.

3.1.4 Scope of the Project:

The Online Code Compiler and Judging System (OCCJS) project aims to provide a detailed and efficient management solution for code compilation and evaluation. The system will simplify and streamline the code submission and judging process, making it straightforward and practical. This project will enable users to access a comprehensive and vivid understanding of their code performance over time, and support current coding activities. It will also reduce operational costs and ensure a smooth and efficient coding and judging process.

The scope of the OCCJS project typically covers the following aspects:

Functional Scope:

• Code Management: The system should cover tasks related to code submission, compilation, and execution across various programming languages.
• User Management: Creating and managing user accounts, handling user information, and providing authentication for coding services.
• Compilation and Judging: Automating the process of code compilation, execution of test cases, and evaluation to streamline coding activities.
• Search and Retrieval: Implementing a robust search mechanism for users to quickly locate past submissions, languages, and other resources.
• Reporting and Analytics: Generating reports on user performance, common errors, and popular languages to aid decision-making.
• Security and Access Control: Ensuring the security of sensitive data and implementing access controls to manage user privileges.

Non-Functional Scope:

• Usability: Ensuring a user-friendly interface that promotes ease of navigation and a positive user experience for both users and administrators.
• Scalability: Designing the system to accommodate growth in the number of users and code submissions over time.
• Performance: Meeting performance standards to ensure timely response and efficient processing of code submissions and evaluations.
• Reliability: Building a reliable system that minimizes downtime and ensures the continuous availability of coding services.
• Security: Incorporating robust security measures to protect against unauthorized access, data breaches, and other security threats.

By covering these aspects, the Online Code Compiler and Judging System project aims to enhance the efficiency, accessibility, and user satisfaction of coding platforms, ultimately contributing to an enriched and competitive coding environment.

3.2 Methodologies | Synopsis for Online Code Compiler and Judging System Project

In the Online Code Compiler and Judging System (OCCJS), we are utilizing various technologies and methodologies to address our requirements. Below is a detailed description of the technology used and methods we are applying in our project.

Technology Used:

We are developing the Online Code Compiler and Judging System using the MERN stack, which involves MongoDB, Express.js, React, and Node.js for both the frontend and backend development. This structured methodology ensures a seamless and efficient development process.

ER Model of Online Code Compiler and Judging System Project:

An Entity-Relationship Diagram (ERD) for the OCCJS models the entities and their relationships within the system. Below is a simplified ERD for the project, providing a rough idea about the working of the system. Let's Draw an ER Model of the Online Code Compiler and Judging System Project:

Entities:

• User:
  • Attributes: UserID (Primary Key), Name, Email, Password, Role (e.g., admin, participant).
• CodeSubmission:
  • Attributes: SubmissionID (Primary Key), UserID (Foreign Key), Language, Code, SubmissionDate, Status.
• TestCase:
  • Attributes: TestCaseID (Primary Key), SubmissionID (Foreign Key), Input, ExpectedOutput, ActualOutput, Status.
• Contest:
  • Attributes: ContestID (Primary Key), Name, Description, StartDate, EndDate.
• Result:
  • Attributes: ResultID (Primary Key), SubmissionID (Foreign Key), Score, Feedback, EvaluationDate.
• Authentication:
  • Attributes: AuthID (Primary Key), UserID (Foreign Key), LastLoginDate, LoginAttempts.

Relationships:

• Submits (Association between User and CodeSubmission):
  • A User can submit multiple code submissions.
  • A CodeSubmission is submitted by a User.
• Contains (Association between CodeSubmission and TestCase):
  • A CodeSubmission contains multiple test cases.
  • A TestCase belongs to one CodeSubmission.
• Has (Association between CodeSubmission and Result):
  • A CodeSubmission has one result.
  • A Result is related to one CodeSubmission.
• Includes (Association between Contest and CodeSubmission):
  • A Contest includes multiple code submissions.
  • A CodeSubmission belongs to one contest.
• Authenticates (Association between Authentication and User):
  • The Authentication system authenticates users during the login process.
  • A User has one authentication record.

This ER model outlines the key entities and their relationships, providing a clear understanding of the system's structure and workflow. By leveraging the MERN stack and following this methodology, the project aims to deliver an efficient, scalable, and user-friendly Online Code Compiler and Judging System.

Data Flow Diagram of Online Code Compiler and Judging System Project

A Data Flow Diagram (DFD) serves as a visual representation of the flow of information within the Online Code Compiler and Judging System (OCCJS). This diagram illustrates how data, such as code submissions, user details, and evaluation results, moves between various components of the OCCJS.

• Processes, represented by circles or ovals, depict activities such as code submission, compilation, evaluation, and result generation.
• Data stores, depicted by rectangles, represent where information is stored, including databases housing user data, code submissions, and test cases.
• Data flows, indicated by arrows, showcase how data moves between processes, data stores, and external entities like users and administrators.

The DFD provides a concise yet comprehensive overview of the OCCJS’s data flow and interactions, aiding in the analysis, design, and communication of the system’s functional aspects.

Level 0 DFD (Context Diagram)

Level 1 DFD

Level 2 DFD:

These DFDs provide a visual breakdown of the flow of data within the Online Code Compiler and Judging System. The context diagram (Level 0) gives an overview of the system's interaction with external entities. The detailed process diagram (Level 1) breaks down the major processes within the system. The sub-process diagram (Level 2) provides an in-depth look at the code submission and evaluation processes. This hierarchical representation helps in understanding the system's functional aspects and interactions clearly.

Use Case Diagram of Online Code Compiler and Judging System Project

A Use Case Diagram is a behavior model that describes the interaction between users (actors) and the system to achieve specific goals. It highlights different actions performed by the system in collaboration with users to accomplish tasks. Use case diagrams are widely used to manage and understand system functionalities.

Here is a Use Case Diagram for the Online Code Compiler and Judging System Project:

Use Cases:

• Register: Allows new users to create an account.
• Login: Authenticates users and provides access to the system.
• Submit Code: Enables users to submit their code for compilation and evaluation.
• View Results: Allows users to view the results of their code submissions.
• Participate in Contest: Lets users join and participate in coding contests.
• Create Contest: Allows administrators to create new coding contests.
• Manage Users: Enables administrators to manage user accounts and permissions.
• Generate Reports: Allows administrators to generate various reports based on user activity and system performance.
• Evaluate Code: Automates the evaluation of submitted code based on predefined test cases.

This Use Case Diagram provides a clear overview of the interactions between users (both general users and administrators) and the system, helping in the analysis and design of the Online Code Compiler and Judging System.

3.3 Features | Synopsis for Online Code Compiler and Judging System Project

The proposed Online Code Compiler and Judging System (OCCJS) is designed to streamline coding activities, providing features for both users and administrators.

For Users:

We will have the following features for a User:

• New User Registration:
  • This feature allows new users (students, participants, etc.) to sign up for the system by providing the necessary details.
• User Login:
  • This feature provides authenticated access for registered users to use the system.
• Submit Code:
  • This feature allows users to submit their code for compilation and evaluation, supporting multiple programming languages.
• View Results:
  • This feature enables users to view the results of their code submissions, including feedback and scores.
• Participate in Contests:
  • This feature allows users to join and participate in coding contests, submitting their solutions to problems.
• Track Submissions:
  • This feature allows users to track the status and history of their code submissions.

For Admin:

• Record Coding Activities:
  • This feature allows administrators to log various records into the system, such as code submissions, evaluations, and user activities.
• Manage Users:
  • This feature allows administrators to keep track of the number of users and their details, including managing user accounts and permissions.
• Create and Manage Contests:
  • This feature allows administrators to create new coding contests, set up problems, and manage contest details.
• Evaluate Code:
  • This feature automates the evaluation of code submissions based on predefined test cases, ensuring accurate and fair assessments.
• Generate Reports:
  • This feature allows administrators to generate reports on user performance, contest participation, and other system metrics.
• Authentication and Authorization:
  • The system implements a secure login mechanism for users and administrators. The admin has the authority to manage user access and ensure data integrity.

Common Features:

• Real-time Feedback:
  • Provides instant feedback on code submissions, enabling users to learn and improve their coding skills.
• Multi-language Support:
  • Supports multiple programming languages such as C++, Java, Python, and more.
• User-Friendly Interface:
  • Ensures an intuitive and user-friendly interface for easy navigation and seamless interaction with the system.
• Scalability:
  • Designed to accommodate growth in the number of users and code submissions over time.
• Security:
  • Incorporates robust security measures to protect against unauthorized access, data breaches, and other security threats.

By integrating these features, the Online Code Compiler and Judging System project aims to enhance the efficiency, accessibility, and user satisfaction of coding platforms, fostering a productive and interactive coding environment.

3.4 Impact | Synopsis for Online Code Compiler and Judging System Project

The proposed Online Code Compiler and Judging System (OCCJS), developed using the MERN stack, is expected to have a substantial impact on coding education and competition platforms, benefiting both users and administrators in several ways:

• User-Friendly Interface: The intuitive and easy-to-navigate interface makes it more convenient for users to submit code, view results, and participate in contests. This improved experience is likely to encourage greater engagement and usage of the platform.
• Real-time Feedback: The efficient code compilation and evaluation process significantly reduce the time users spend waiting for results. Quick feedback and streamlined processes contribute to a more time-efficient and productive coding environment.
• Automation of Activities: Automation of code submissions, test case executions, and result evaluations enhances operational efficiency. Users receive timely feedback and notifications, reducing the need for manual oversight and allowing administrators to focus on more strategic tasks.
• Consistent Evaluations: The regular maintenance of accurate and reliable evaluation criteria ensures that code submissions are judged fairly and consistently. Users can trust the system to provide dependable feedback, contributing to a more satisfying and credible coding experience.
• Secure Login and Data Protection: The implementation of secure login and access control measures ensures the integrity and confidentiality of user data. Administrators can efficiently manage user access, and users can trust that their personal information is secure, fostering trust in the system.
• Data-Driven Insights: With the ability to track user performance and submission trends, administrators can optimize the platform's resources. This includes identifying popular programming languages, common errors, and areas for improvement, ultimately enhancing the platform’s overall value.
• Integration with Modern Tools: The integration of modern tools and technologies, such as real-time compilers and cloud-based storage, aligns the platform with current technological trends. This not only improves the efficiency of code submissions and evaluations but also showcases the platform’s commitment to staying relevant in the digital era.

By integrating these features and achieving these impacts, the Online Code Compiler and Judging System project aims to revolutionize the coding education and competition landscape, fostering a more interactive, efficient, and user-friendly environment for all participants.

3.5 Limitations | Synopsis for Online Code Compiler and Judging System Project

While the Online Code Compiler and Judging System (OCCJS) can offer many benefits, it may also have certain limitations. Here are some potential constraints associated with such a system:

• Scalability Challenges: Depending on the design and architecture, scalability might be limited, making it challenging to handle a significant increase in users or data volume.
• Slower Performance: Large datasets or complex code submissions may result in slower performance, especially if optimization techniques are not adequately implemented.
• Vulnerabilities: Without careful attention to security practices, there might be vulnerabilities such as injection attacks or cross-site scripting, posing risks to data integrity and user privacy.
• Internet Dependency: A web-based OCCJS may have limitations in providing offline access to resources, which could be a constraint in environments with intermittent or no internet connectivity.
• Compatibility Issues: Issues may arise across different browsers, requiring additional effort to ensure a consistent user experience.
• UI Challenges: While React provides robust UI capabilities, achieving highly customized and dynamic user interfaces might still be challenging compared to more specialized frameworks.
• JavaScript Dependency: If users disable JavaScript in their browsers, certain interactive features might not function correctly, affecting the overall user experience.
• Real-time Challenges: Implementing real-time updates, such as live feedback or collaborative coding, may require more advanced technologies (like WebSocket) and could add complexity to the system.
• Server Load: Heavy reliance on server-side processing with Node.js might lead to increased server loads, affecting response times, especially during peak usage periods.
• Mobile Challenges: While React and CSS can enhance mobile responsiveness, ensuring a seamless experience across all devices may require additional effort and testing.

To mitigate these limitations, it’s essential to continuously monitor and update the system, follow best practices in coding and security, and consider adopting additional technologies or frameworks based on evolving project requirements. Regular testing and user feedback can also help identify and address potential constraints.

3.6 Future Scope | Synopsis for Online Code Compiler and Judging System Project

The future scope of an Online Code Compiler and Judging System (OCCJS) developed using the MERN stack (MongoDB, Express.js, React, and Node.js) is promising, with opportunities for enhancement and expansion. Some potential future avenues for the project include:

• Integration of Advanced Technologies: Explore the integration of artificial intelligence (AI) and machine learning (ML) for intelligent code recommendations, predictive analytics, and user behavior analysis.
• Mobile Applications: Develop dedicated mobile applications for iOS and Android platforms to provide a more seamless and tailored user experience on smartphones and tablets.
• Enhanced User Interactivity: Implement more interactive features, such as real-time collaboration, chat support, and discussion forums, to foster a sense of community among users.
• Accessibility Improvements: Focus on enhancing accessibility features to ensure inclusivity for users with diverse needs, including those with disabilities. This could involve compliance with accessibility standards and guidelines.
• Blockchain Integration: Explore the potential of integrating blockchain technology for secure and transparent management of transactions, user data, and digital rights management.
• E-learning Integration: Integrate e-learning functionalities, allowing users to access educational materials, tutorials, and multimedia content directly through the OCCJS.
• Data Analytics for Decision-Making: Implement advanced data analytics tools to derive insights into user performance, common errors, and popular languages. This data-driven approach can inform decision-making for system improvements and resource allocation.
• Multi-language Support: Expand the system’s reach by incorporating multi-language support to cater to diverse user populations and potentially attract a global user base.
• Enhanced Security Measures: Stay abreast of evolving cybersecurity threats and implement advanced security measures to safeguard user data and ensure the integrity of the system.
• Customization Options: Provide users with more customization options, allowing them to personalize their profiles, preferences, and interface settings for a tailored experience.
• Voice Recognition and AI Assistants: Explore the integration of voice recognition technology and AI-driven virtual assistants to enable hands-free interactions and enhance the overall user experience.
• Collaboration with External Systems: Collaborate with external systems, such as educational platforms or other coding communities, to expand the availability of resources and streamline inter-platform interactions.
• User Feedback Mechanisms: Strengthen user feedback mechanisms to continuously gather input on system performance, identify areas for improvement, and enhance user satisfaction.

After creating a synopsis of our project, we will start building the Software Requirement Specification (SRS) for our project, which will be our next phase. This document will detail the functional and non-functional requirements, ensuring a clear roadmap for the development and implementation of the Online Code Compiler and Judging System.

Step 4- Requirement Gathering (Creating SRS for Online Code Compiler and Judging System)

This is the next phase after the submission of the synopsis report. We can do this process before the Synopsys report creation as well , It is all depends upon the project and their requirements. Here after getting an overview about the project now we can easily do the requirement gathering for our project.

Requirement analysis, also known as requirements engineering or elicitation, is a critical phase in the software development process. It involves gathering, documenting, and analysing the needs and constraints of a project to define its scope and guide subsequent development.

We develop a detailed Software Requirement Specification for Online Code Compiler and Judging System Project , in this process which will have all the details about the project from Technical to Non Technical Requirements.

Software Requirement Specification (SRS) Document | Online Code Compiler and Judging System Project

Below are some of the key points in a Software Requirement Specification Document:

• Purpose
• Scope
• References

• Introduction
• Overall Description
  • Product Perspective
  • Product Function
  • User Classes and characteristics
  • Operating Environment
  • Assumptions and Dependencies
• Functional Requirements
  • Software Requirements
  • Hardware Requirements
  • Database Requirements
• Non-Functional Requirement
  • Usability Requirements
  • Security Requirements
  • Availability Requirements
  • Scalability Requirements
  • Performance Requirements
• Design
  • Control Flow Diagram
  • ER Model
  • Use Case Diagram
• System Features

Note: To know more about What is a SRS Document or How to write a good SRS for your Project follow these articles.

Let’s Start building a Software Requirement Specification for Online Code Compiler and Judging System Project Document for our project:

4.1 SRS (Online Code Compiler and Judging System) | Introduction:

4.1.1 Purpose:

The main objective of this document is to illustrate the requirements of the project Online Code Compiler and Judging System. The document provides a detailed description of both functional and non-functional requirements proposed by the client.

The purpose of this project is to create a user-friendly environment for coding, compiling, and judging code submissions. The system aims to maintain the details of user submissions, provide real-time feedback, support multiple programming languages, and generate various reports. It describes the hardware and software interface requirements using ER Models and UML diagrams.

4.1.2 Scope of the Project:

The Online Code Compiler and Judging System project aims to convert traditional coding platforms into a modern, internet-based web application. This system will allow users to submit code, receive real-time feedback, and participate in coding contests. It will support multiple programming languages and offer features such as automated judging, user management, and reporting.

The project is specifically designed for use by coding competition organizers, educational institutions, and individual users. The product will function as a comprehensive interface for managing coding activities and assessments. The Online Code Compiler and Judging System can be used by any organization to manage coding contests, evaluate submissions, and provide feedback. It is particularly useful for educational institutes where the content and functionality can be easily modified according to requirements.

The project can be easily implemented in various environments. New features can be added as needed, ensuring flexibility and reusability across all modules. The system will be developed using the MERN stack (MongoDB, Express.js, React, and Node.js). These technologies are chosen for their performance, available tools, cross-platform compatibility, extensive libraries, cost-effectiveness (freely available), and efficient development process.

4.1.3 References:

Books:

• Software Requirements (Microsoft) Second Edition By Karl E. Wiegers
• Fundamentals of Database System By Elmasri
• Software Requirements and Specifications: A Lexicon of Practice, Principles and Prejudices (ACM Press) by Michael Jackson
• Fundamentals of Software Engineering By Rajib Mall
• Software Engineering: A Practitioner’s Approach Fifth Edition By Roger S. Pressman

4.2 SRS (Online Code Compiler and Judging System) | Overall Description:

4.2.1 Product Perspective:

The Online Code Compiler and Judging System (OCCJS) is designed to replace traditional coding platforms that rely on manual code submission and evaluation processes. OCCJS will provide an advanced code compilation and judging mechanism, making it easy to submit, compile, and evaluate code online.

4.2.2 Product Functions:

The proposed Online Code Compiler and Judging System is designed to streamline coding activities and provide features for both users and administrators.

Authentication and Authorization System: The system implements a secure login mechanism for users and administrators. The admin has the authority to manage user access and ensure data integrity.

For Users: We will have the following features for users:

• New User Registration:
  • This feature allows new users (students, participants, etc.) to sign up for the system by providing the necessary details.
• User Login:
  • This feature provides authenticated access for registered users to use the system.
• Submit Code:
  • This feature allows users to submit their code for compilation and evaluation, supporting multiple programming languages.
• View Results:
  • This feature enables users to view the results of their code submissions, including feedback and scores.
• Participate in Contests:
  • This feature allows users to join and participate in coding contests, submitting their solutions to problems.
• Track Submissions:
  • This feature allows users to track the status and history of their code submissions.

For Admin:

• Record Coding Activities:
  • This feature allows administrators to log various records into the system, such as code submissions, evaluations, and user activities.
• Manage Users:
  • This feature allows administrators to keep track of the number of users and their details, including managing user accounts and permissions.
• Create and Manage Contests:
  • This feature allows administrators to create new coding contests, set up problems, and manage contest details.
• Evaluate Code:
  • This feature automates the evaluation of code submissions based on predefined test cases, ensuring accurate and fair assessments.
• Generate Reports:
  • This feature allows administrators to generate reports on user performance, contest participation, and other system metrics.
• Authentication and Authorization:
  • The system implements a secure login mechanism for users and administrators. The admin has the authority to manage user access and ensure data integrity.

4.2.3 Class Diagram and Characteristics:

Class Diagram for Library Management System simply describes structure of Online Code Compiler and Judging System class, attributes, methods or operations, relationship among objects.

Class Diagram for Online Code Compiler and Judging System Project

Aggregation and Multiplicity are two important concepts to consider while designing a Class Diagram.

Aggregation: Aggregation shows a relationship where one thing can exist independently of another. It means to create or compose different abstractions together in defining a class. Aggregation is represented as a part of a relationship in the class diagram. In the diagram below, aggregation is represented by an edge with a diamond end pointing towards the superclass.

The "Online Code Compiler and Judging System" is the superclass that consists of various classes. These classes are User, CodeSubmission, and Contest as shown in the diagram. Further, for the "Account" class, "User" is a superclass. All of these share a relationship known as aggregate relationships.

Multiplicity: Multiplicity indicates the number of elements of a class associated with another class. These relationships can be one-to-one, many-to-many, many-to-one, or one-to-many. For denoting one element we use 1, for zero elements we use 0, and for many elements we use *.

In the diagram, many users are associated with many code submissions, denoted by *, representing a many-to-many relationship. One user has only one account, denoted by 1, representing a one-to-one relationship. Many code submissions are associated with one contest, representing many-to-one or one-to-many relationships. All these relationships are shown in the diagram.

This class diagram illustrates the structure and relationships of the Online Code Compiler and Judging System, showcasing aggregation and multiplicity. The diagram provides a clear overview of how different classes interact and relate to each other, essential for understanding and designing the system.

4.2.4 General Constraints:

• The information of all users, code submissions, and contests must be stored in a database that is accessible by the website. MongoDB will be used as the database engine.
• The Online Code Compiler and Judging System (OCCJS) is required to be operational 24 hours a day to accommodate users from different time zones and ensure continuous access.
• Users may access OCCJS from any device that has Internet browsing capabilities and an Internet connection.
• Users must have their correct usernames and passwords to enter into their online accounts and perform actions such as submitting code and viewing results.

4.2.5 Assumptions and Dependencies:

Assumptions:

• The coding should be error-free to ensure reliable and accurate operation.
• The system should be user-friendly, making it easy to use for all users, including participants and administrators.
• The information of all users, code submissions, and contests must be stored in a database that is accessible by the website.
• The system should have a high storage capacity and provide fast access to the database to handle multiple simultaneous users.
• The system should provide efficient search functionality and support quick transactions to enhance user experience.
• The Online Code Compiler and Judging System is expected to run 24 hours a day to accommodate users at any time.
• Users must have their correct usernames and passwords to access their accounts and perform actions on the system.

Dependencies:

• The system relies on specific hardware and software to operate. This includes the server infrastructure, the MERN stack (MongoDB, Express.js, React, Node.js), and other supporting technologies.
• The project will be developed and run based on the listed requirements and specifications.
• The end users (both participants and administrators) should have a proper understanding of the product to use it effectively.
• The system should have a general reporting mechanism to store and manage reports on user performance, code submissions, and contest outcomes.
• The information of all users must be stored in a database that is accessible by the Online Code Compiler and Judging System.
• Any update regarding code submissions or contest details must be recorded in the database, ensuring that the data entered is accurate and up-to-date.

These constraints, assumptions, and dependencies outline the operational framework within which the Online Code Compiler and Judging System will be developed and maintained. Ensuring these elements are addressed will contribute to the successful implementation and usability of the system

4.3 SRS (Online Code Compiler and Judging System)

Use case Diagram for Online Code Compiler and Judging System:

This broad-level diagram of the project provides a basic overview of the Online Code Compiler and Judging System. The users of this system can be either administrators or participants. The system offers various functionalities to facilitate code submission, evaluation, and feedback.

Users and Roles:

• Participants: These users can submit code, view results, participate in contests, and track their submission history.
• Administrators: These users can manage users, create and manage contests, evaluate code submissions, and generate reports.

Key Functionalities:

• Code Submission: Participants can submit their code, which will be compiled and evaluated based on predefined test cases.
• Search Functionality: The system provides a search functionality to facilitate finding past submissions, contests, and user information. The search can be based on various categories like programming language, contest name, or user details.
• Real-time Feedback: Participants receive real-time feedback on their code submissions, helping them identify and fix errors quickly.
• Contest Management: Administrators can add or update contests and manage participants and their submissions.
• User Management: Administrators can add, update, or remove users from the system. They can also manage user roles and permissions.
• Report Generation: The system can generate various reports related to user performance, submission statistics, and contest outcomes.
• Request Handling: Participants can request issue, renewal, or return of their code submissions. They must follow certain criteria set by the system for these actions.

ER Model of Online Code Compiler and Judging System Project

An Entity-Relationship Diagram (ERD) is used to analyze the structure of the database, showing relationships between entities and their attributes. An ER Model provides a means of communication and a clear overview of the system's data structure.

The Online Code Compiler and Judging System project database keeps track of users and their code submissions with the following considerations:

• The system keeps track of users (both participants and administrators) with a single-point authentication system comprising a login ID and password.
• Users submit code with details such as submission ID, user ID, programming language, and submission date.
• Contests are managed with contest ID, name, description, start date, and end date.
• Each code submission has associated test cases with details like input, expected output, actual output, and status.
• Results of code submissions include result ID, submission ID, score, feedback, and evaluation date.
• Administrators generate reports that include user ID, submission ID, contest ID, and evaluation info.

Description:

• User: Contains details about users including their ID, name, email, password, and role (participant or administrator).
• CodeSubmission: Stores information about each code submission, including the ID of the submission, user, contest, language used, code content, submission date, and status.
• TestCase: Holds the test cases associated with each code submission, including input, expected output, actual output, and status.
• Contest: Includes information about contests, such as contest ID, name, description, start date, and end date.
• Result: Contains results of the code submissions, with details like result ID, submission ID, score, feedback, and evaluation date.
• Report: Stores reports generated by administrators, detailing user ID, submission ID, contest ID, and the date of report generation.

This ER diagram provides a structured overview of the Online Code Compiler and Judging System, illustrating the entities, their attributes, and relationships within the system.

Data Flow Diagram of Online Code Compiler and Judging System Project

A Data Flow Diagram (DFD) serves as a visual representation of the flow of information within the system. This diagram illustrates how data, such as code submissions, user details, and evaluation results, moves between various components of the Online Code Compiler and Judging System (OCCJS).

Level 0 DFD (Context Diagram)

The Level 0 DFD provides a high-level overview of the entire system, showing the interactions between the system and external entities.

Level 1 DFD (Detailed Process Diagram)

The Level 1 DFD breaks down the high-level process into more detailed sub-processes, showing the flow of data between these processes and data stores.

Level 2 DFD (Detailed Sub-process Diagram for Code Submission and Evaluation)

The Level 2 DFD provides an in-depth look at the code submission and evaluation processes.

hese DFDs provide a visual breakdown of the flow of data within the Online Code Compiler and Judging System. The context diagram (Level 0) gives an overview of the system's interaction with external entities. The detailed process diagram (Level 1) breaks down the major processes within the system. The sub-process diagram (Level 2) provides an in-depth look at the code submission and evaluation processes. This hierarchical representation helps in understanding the system's functional aspects and interactions clearly.

4.4 Functional Requirements | SRS (Online Code Compiler and Judging System)

The Online Code Compiler and Judging System (OCCJS) must have the following functional requirements:

• User Management:
  • The system should store all information about users, including login details, code submissions, and contest participation records.
  • The system should distinguish between different user roles such as participants and administrators.
• Code Management:
  • The system should store all information about code submissions in a secure and organized manner.
  • The system should support multiple programming languages for code submission and compilation.
• Search Functionality:
  • The system should allow users to search for past submissions, contests, and other relevant data by various criteria such as programming language, submission date, and user details.
• Contest Management:
  • Administrators should be able to create, update, and manage coding contests, including setting up problems and test cases.
  • The system should generate reports for administrators to help them make decisions about contest outcomes and participant performance.
• Code Compilation and Evaluation:
  • The system should provide a module for code submission and compilation.
  • The system should run submitted code against predefined test cases and provide real-time feedback to users.
  • The system should store results of code evaluations, including scores and feedback.
• User Requests:
  • The system should provide modules to handle user requests for participating in contests, viewing results, and managing submissions.
• Administration:
  • The Admin must be able to add, remove, and manage users and contests.
  • The system should ensure secure access control, allowing only authorized users to perform administrative tasks.

4.4.1 Software Requirements:

This software package is developed using the MERN stack, which includes MongoDB, Express.js, React, and Node.js.

• Operating System: Windows 7, 8, 10, or any compatible Linux distribution.
• Language: JavaScript (for both front end and back end), HTML, CSS
• Database: MongoDB (back end)

4.4.2 Hardware Requirements:

• Processor: Intel Core i3 or above for a stable experience and fast processing of data.
• Hard Disk: 40GB and above
• RAM: 2 GB or more recommended for fast reading and writing capabilities, which will result in better performance.

These requirements ensure that the Online Code Compiler and Judging System will function efficiently, providing a smooth and user-friendly experience for both participants and administrators. The system is designed to be robust and scalable, capable of handling multiple users and code submissions simultaneously.

4.5 Non-Functional Requirements | SRS (Online Code Compiler and Judging System)

4.5.1 Usability Requirements:

• The user interface should be interactive, simple, and easy to understand.
• The system should prompt users and administrators to log in to the application to ensure proper input criteria.
• The Online Code Compiler and Judging System shall handle expected and unexpected errors in ways that prevent loss of information and minimize downtime.

4.5.2 Security Requirements:

• The system should use a secure database to store all information.
• Regular users can only read information and modify their personal details, but cannot edit or modify other data.
• The system will have different types of users, each with specific access constraints.
• Proper user authentication must be provided.
• Passwords should be stored securely, ensuring no one can hack user passwords.
• There should be separate accounts for admins and participants, with only admins having the rights to update the database.

4.5.3 Performance Requirements:

• The system shall accommodate a high number of users and code submissions without any faults.
• Responses to view information shall take no longer than 5 seconds to appear on the screen.

4.5.4 Error Requirements:

• The Online Code Compiler and Judging System shall handle expected and unexpected errors in ways that prevent loss of information and minimize downtime.

These non-functional requirements ensure that the Online Code Compiler and Judging System will provide a user-friendly, secure, and high-performing environment for all users. The system is designed to handle large volumes of data and users efficiently while maintaining the integrity and security of all stored information. Proper error handling will ensure that the system remains reliable and available, even in the face of unexpected issues.

4.6 SRS (Online Code Compiler and Judging System) | Appendices:

Appendix A:

• A: Admin, Abbreviation, Acronym, Assumptions
• B: Business rules
• C: Class, Client, Conventions
• D: Data requirement, Dependencies
• G: GUI
• K: Key
• L: Language, Login
• N: Non-functional Requirement
• O: Operating environment
• P: Performance, Perspective, Purpose
• R: Requirement, Requirement attributes
• S: Security, Scope, System features
• U: User, User class and characteristics, User requirement

Glossary:

The following are the list of conventions and acronyms used in this document and the project as well:

• Administrator: A login ID representing a user with administrative privileges to the software.
• User: A general login ID assigned to most users.
• Client: Intended users of the software.
• User Interface Layer: The section of the system that the user interacts with directly.
• Interface: Something used to communicate across different mediums.
• Contest: A coding competition organized within the system.
• Submission: Code submitted by a user for evaluation.
• Test Case: Predefined inputs and outputs used to evaluate the correctness of submissions.
• Evaluation: The process of running submitted code against test cases and scoring the results.
• Feedback: Information provided to users regarding the performance of their code submissions.
• Authentication: The process of verifying the identity of a user.
• Authorization: The process of granting or denying access to system resources based on user roles.

These appendices provide essential definitions and explanations of terms, abbreviations, and concepts used throughout the document and the project. This section serves as a reference to ensure clear communication and understanding among all stakeholders involved in the development and use of the Online Code Compiler and Judging System.

5. Coding or Implementation of Online Code Compiler and Judging System

At this stage, the fundamental development of the product starts. For this, developers use a specific programming code as per the design. Hence, it is important for the coders to follow the protocols set by the association. Conventional programming tools like compilers, interpreters, debuggers, etc. are also put into use at this stage.

5.1 Setting Up Visual Studio Code (VS Code)

Visual Studio Code is a powerful and free source-code editor. Follow these steps to set up VS Code:

1. Download and Install VS Code:
   • Go to the VS Code download page and download the installer for your operating system.
   • Run the installer and follow the instructions to complete the installation.
2. Install Extensions:
   • Open VS Code.
   • Go to the Extensions view by clicking the Extensions icon in the Activity Bar on the side of the window or by pressing Ctrl+Shift+X.
   • Search for and install the following recommended extensions:
     • ESLint
     • Prettier
     • MongoDB for VS Code
     • Node.js Extension Pack
     • JavaScript (ES6) code snippets

5.2 Setting Up MongoDB

MongoDB is a NoSQL database used for storing user and submission data.

1. Download and Install MongoDB:
   • Go to the MongoDB download page and download the installer for your operating system.
   • Run the installer and follow the instructions to complete the installation.
2. Start MongoDB:
   • Open a terminal or command prompt.
   • Run the following command to start the MongoDB server
   • mongod
3. Verify Installation:
   • Open another terminal or command prompt.
   • Run the MongoDB shell to verify the installation
   • mongo

5.3 Setting Up Node.js

Node.js is a JavaScript runtime used for the backend server.

1. Download and Install Node.js:
   • Go to the Node.js download page and download the installer for your operating system.
   • Run the installer and follow the instructions to complete the installation.
2. Verify Installation:
   • Open a terminal or command prompt.
   • Verify the installation by running:
   • node -v

5.4 Setting Up C/C++, Java, and Python Compilers:

These compilers are necessary for compiling and running code submissions.

• Setting C/C++ Compiler
• Setting up Java Compiler
• Setting Up Python Compiler
  

Verify Compiler Setup:

• Test the compilers by running simple programs using GCC, javac, and python commands in the terminal to ensure they are correctly set up.

5.5 Setting Up the Project

Clone the Project Repository:

• Open a terminal or command prompt.
• Clone the project repository from GitHub:

git clone https://github.com/geeksforgeeksorg/Online-Code-Compiler-and-Judging-System.git

Navigate to the Project Directory:

• Change into the project directory:

cd Online-Code-Compiler-and-Judging-System

Install Project Dependencies:

Install the backend dependencies:

npm install

Navigate to the frontend directory and install dependencies:

cd frontend 
npm install

Start the Backend Server:

• Navigate back to the project root directory and start the backend server:

cd ..
npm start

Start the Frontend Server:

• Open a new terminal or command prompt
• Navigate to the project directory and then frontend directory and start the frontend server:

(Project Directory)  cd frontend
npm start

Admin Module Credentials:

Username: [email protected]
Password: Admin@123

Step 6 - Testing Online Code Compiler and Judging System

Testing is a crucial phase in the development of an Online Code Compiler and Judging System (OCCJS) to ensure that it meets its intended requirements, functions correctly, and is free of bugs. Below are some key steps and considerations for the testing phase of an online code compiler and judging system:

Unit Testing:

• Objective: Test individual modules or components of the system in isolation to ensure they function as intended.
• Actions:
  • Write and execute unit tests for backend components like user authentication, code submission handling, and result generation.
  • Test individual React components on the frontend to ensure they render correctly and handle user interactions as expected.
  • Identify and fix any bugs or issues found at the module level.

Integration Testing:

• Objective: Verify that different modules and components of the OCCJS work together seamlessly.
• Actions:
  • Test data flow and interactions between various parts of the system, such as between the frontend and backend, or between the code submission module and the evaluation module.
  • Ensure that data is correctly passed and processed through the system.

Functional Testing:

• Objective: Validate that the OCCJS performs its intended functions accurately and efficiently.
• Actions:
  • Test basic functionalities such as user registration, login, code submission, code compilation, and result viewing.
  • Verify contest management features like creating contests, submitting code for contests, and generating contest reports.

User Interface (UI) Testing:

• Objective: Ensure that the user interface is user-friendly, intuitive, and visually appealing.
• Actions:
  • Check for consistency in design elements and responsiveness across different devices.
  • Test the UI for various user roles (e.g., participant, admin) to ensure appropriate access and functionality.

Performance Testing:

• Objective: Assess the system’s performance under normal and peak load conditions.
• Actions:
  • Check response times for code submissions, compilation, and result generation.
  • Evaluate the system’s scalability and stability under high user load.

Security Testing:

• Objective: Identify and rectify any security vulnerabilities in the system.
• Actions:
  • Ensure that user data is handled securely and that unauthorized access is prevented.
  • Test for common security issues like SQL injection, cross-site scripting (XSS), and cross-site request forgery (CSRF).

Usability Testing:

• Objective: Evaluate the OCCJS from an end-user perspective to ensure ease of use.
• Actions:
  • Gather feedback on user interfaces, navigation, and overall user experience.
  • Conduct usability testing sessions with real users to identify any usability issues.

Compatibility Testing:

• Objective: Test the OCCJS on various browsers, operating systems, and devices to ensure cross-platform compatibility.
• Actions:
  • Verify that the system works correctly on popular browsers (e.g., Chrome, Firefox, Safari) and operating systems (e.g., Windows, macOS, Linux).
  • Test the responsiveness of the frontend on different devices (e.g., desktops, tablets, smartphones).

Regression Testing:

• Objective: Ensure that new changes or fixes do not negatively impact existing functionalities.
• Actions:
  • Re-run previously executed test cases to verify the overall system stability.
  • Ensure that new features do not introduce new bugs.

Deployment Testing:

• Objective: Conduct tests in the production environment to ensure a smooth transition from the testing phase to live operation.
• Actions:
  • Verify that the system deploys correctly to the production environment.
  • Test all functionalities in the live environment to ensure they work as expected.

By following these testing steps and considerations, the Online Code Compiler and Judging System can be thoroughly evaluated and ensured to provide a reliable, secure, and user-friendly experience for all users.

Step 7 - Creating Project Presentation on Online Code Compiler and Judging System

In this phase of software development, the team will present their work to the authorities who will judge the project and provide suggestions for improvement. Hosting your web project before this step is essential to make a good impression on the judges and authorities.

You can follow the E Portfolio Website project to learn how to host your web projects on GitHub.

Guidelines for the Project Presentation:

• Length: The ideal length of the presentation should be a minimum of 10 slides and a maximum of 15 slides. Given the limited time for the presentation, prepare your slides carefully, focusing on key points.

Suggested Structure for the Presentation:

1. Title Slide:
   • Project title: Online Code Compiler and Judging System
   • Team members' names
   • Date
2. Introduction:
   • Brief overview of the project
   • Objectives and goals of the project
3. Project Scope:
   • Detailed description of the project's scope
   • Target users (participants and administrators)
4. System Architecture:
   • High-level architecture diagram
   • Explanation of the components and their interactions
5. Key Features:
   • User registration and authentication
   • Code submission and compilation
   • Contest management
   • Real-time feedback and results
6. Technical Stack:
   • Frontend: React
   • Backend: Node.js, Express.js
   • Database: MongoDB
   • Other tools and technologies used
7. Database Design:
   • ER Diagram
   • Explanation of key entities and relationships
8. Data Flow Diagram (DFD):
   • Context diagram
   • Level 1 and Level 2 DFDs
9. Implementation Details:
   • Key modules and their functionalities
   • Screenshots of the application (if possible)
10. Testing:
    • Overview of the testing process
    • Types of testing performed (unit, integration, functional, UI, performance, security, usability, compatibility, regression, deployment)
    • Results and findings
11. Challenges and Solutions:
    • Key challenges faced during development
    • Solutions implemented to overcome these challenges
12. Future Enhancements:
    • Possible improvements and additional features for future development
13. Live Demo:
    • Brief demonstration of the hosted project
    • Highlighting key functionalities
14. Conclusion:
    • Summary of the project
    • Key takeaways and learning experiences
15. Q&A:
    • Open the floor for questions from the judges and authorities

Make sure to practice your presentation multiple times to ensure smooth delivery. Focus on explaining the key points concisely and clearly. Good luck with your presentation!

Step 8 - Writing a Research Paper on Online Code Compiler and Judging System Project

You can also write a research paper based on your work. The research paper will explore the significance of implementing an Online Code Compiler and Judging System (OCCJS) to enhance the efficiency, accessibility, and overall functionality of coding platforms.

Key Points for This Paper Include:

1. Abstract:
   • Provide a concise summary of the research paper, highlighting the main objectives, methodologies, results, and conclusions.
2. Introduction:
   • Introduce the concept of the Online Code Compiler and Judging System.
   • Discuss the importance and need for such a system in coding education and competitions.
   • Outline the objectives and goals of the project.
3. Related Work:
   • Review existing systems and solutions similar to the OCCJS.
   • Highlight the gaps and limitations in current systems that your project aims to address.
   • Reference relevant studies, articles, and technologies that influenced your project.
4. Methodologies Used:
   • Describe the technologies and tools used for the development of the OCCJS (e.g., MERN stack: MongoDB, Express.js, React, Node.js).
   • Explain the system architecture and design, including key components and their interactions.
   • Detail the development process, including the setup of the development environment and the implementation of key features.
5. Features:
   • List and describe the main features of the OCCJS, such as:
     • User registration and authentication
     • Code submission and compilation
     • Real-time feedback and result generation
     • Contest creation and management
     • Reporting and analytics
   • Explain how these features enhance the user experience and improve system functionality.
6. Result and Discussion:
   • Present the results of your project, including any testing and performance evaluations.
   • Discuss the effectiveness of the OCCJS in meeting its objectives and goals.
   • Highlight any challenges encountered during development and how they were addressed.
   • Compare the OCCJS with existing solutions, emphasizing its advantages and improvements.
7. Acknowledgement:
   • Acknowledge the contributions and support of individuals, organizations, and resources that helped in the development of the project.
   • Mention any funding or sponsorship received for the project.

Future Enhancements for Online Code Compiler and Judging System Project

The Online Code Compiler and Judging System (OCCJS) can be further enhanced with the following features to improve its efficiency, user experience, and functionality:

1. Enhanced User Analytics:
   • Implement advanced analytics to track user performance, submission trends, and common errors. This data can be used to provide personalized feedback and recommendations to users, helping them improve their coding skills.
2. Gamification:
   • Introduce gamification elements such as badges, leaderboards, and achievements to motivate users and make the coding experience more engaging and enjoyable.
3. Mobile App Development:
   • Develop dedicated mobile applications for iOS and Android platforms to provide users with a seamless experience on their smartphones and tablets. This will increase accessibility and convenience for users who prefer mobile devices.
4. Integration with IDEs:
   • Integrate the OCCJS with popular Integrated Development Environments (IDEs) to allow users to submit code directly from their development environment. This will streamline the coding process and enhance user productivity.
5. Real-time Collaboration:
   • Implement real-time collaboration features that enable multiple users to work on the same code submission simultaneously. This will facilitate teamwork and collaborative problem-solving.
6. Advanced Security Measures:
   • Continuously update and enhance security measures to protect user data and ensure the integrity of the system. This includes implementing multi-factor authentication, data encryption, and regular security audits.
7. Support for More Programming Languages:
   • Expand the range of supported programming languages to cater to a wider audience. This will make the system more versatile and useful for users with different coding preferences.
8. AI-Powered Code Review:
   • Integrate AI and machine learning algorithms to provide automated code reviews and suggestions for improvement. This will help users write better code and learn best practices.

By implementing these future enhancements, the Online Code Compiler and Judging System can continue to evolve, offering users an even more comprehensive, efficient, and engaging platform for coding education and competitions