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Php OOP interview questions
- 1. PHP Interview Questions Regarding OOPs From Version Up IT Training - https://versionup.in/ 1
- 2. 1.What Is PHP? PHP:Hypertext Preprocessor. PHP is a server side scripting language that is embedded in HTML. It is used to manage dynamic content, databases, session tracking, even build entire e-commerce sites. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 2
- 3. Scripting Javascript,PHP, VB Script Programming Java,C,C++ Languages If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 3
- 4. 2.Why You Choose PHP? Open Source High Performing Flexible and Dynamic Effective Frameworks And CMS Large Community If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 4
- 5. 3. What's the latest version of php? It’s 7.4.4 => 19 Mar 2020 If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 5
- 6. 4. What are the major difference between PHP 5 and PHP 7? Performance Declaring The Return Type Error Handling Spaceship Operator Anonymous Class New Operators If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 6
- 7. 5. Is PHP a strongly typed language? No. PHP is a weakly typed or loosely typed language Sample code: • $var = "Hello"; //String • $var = 10; //Integer If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 7
- 8. 6.What is a class? Collection Of Data member and member Functions. Example: class Person{ public $name; public $age; } If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 8
- 9. 7. What is a Object? Object is real time entity. Object has some properties and behaviors. $obj = new MyClass(); If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 9
- 10. 8.What is Constructor and Destructor? Constructor: Constructor is a special type of function which will be called automatically whenever there is any object created from a class. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 10
- 11. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 11 Destructor: Destructor is a special type of function which will be called automatically whenever any object is deleted or goes out of scope.
- 12. 9.What are access modifiers? Public Private Protected If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 12
- 13. 10. What is Encapsulation? Wrapping up member variables and methods together into a single unit (i.e. Class) is called Encapsulation. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 13
- 14. 11. What is Abstraction? Abstraction is a concept in which implementation details are hidden.. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 14
- 15. 12.Explain about polymorphism? One thing, can use in different forms 1)Function Overloading 2)Function Overriding If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 15
- 16. 12.Explain about polymorphism? One thing, can use in different forms 1)Function Overloading 2)Function Overriding If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 16
- 17. 13. Magic Methods in PHP Construct Destruct Clone Call Autoload If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 17
- 18. 14.Difference Between Interfaces & Abstract Class Interface: An interface is an agreement or a contract. When a class implements an interface, It means it contains same public methods of an interface with their implementation. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 18
- 19. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 19 Abstract class Interface In abstract class a method must be declared as abstract. Abstract methods doesn’t have any implementation. In interface all the methods by default are abstract. Abstract class can also contain member variables and concrete functions/methods. Interfaces cannot contain any member variables and concrete functions/methods except constants. An Abstract methods can be declare with access modifiers like public, protected etc. Concrete Class which is extending the abstract class must be defined with the same or visibility. All methods declared in an interface must be public. A class can Inherits only one Abstract class and Multiple inheritance is not possible for Abstract class. A class can implements many interfaces and Multiple interface inheritance is possible. Only complete member of abstract class can be static. Memebrs of Interface can not be static.
- 20. 15.What is STATIC keyword and what is it's use in PHP ? static member static Function If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 20
- 21. 16.What is Traits in PHP? Traits are a mechanism for code reuse in single inheritance languages such as PHP. If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 21
- 22. 17. What are the advantages of object oriented programming? Code Resusability Modularity Flexibility Maintainability Security Testability If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 22
- 23. About Us We Are Proving Professional It Training. If you Want to learn Any New Technology you can contact us on : Contact On : https://versionup.in/ Call On :+91 8780656929 If You want to Learn PHP Contact On +91 8780656929 https://versionup.in/ 23