30 Java Coding Questions To Assess Programming Skills part 3 ~ foundjava

Question-24. Which Of The Following Would The Below Java Coding Snippet Return On Execution?

Java

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public class SimpleTest {       static int test;     boolean final()     {         test++;         return true;     }       public static void main(String[] args)     {         test=0;         if ((final() | final()) || final())             test++;         System.out.println(test);     } }

A. 1 
B. 2 
C. 3 
D. Compilation error

Check correct option.

Question-25. Which Of The Following Values Would The Below Java Coding Snippet Yield?

Java

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public class SimpleTest {       public static void main(String[] args) {         String text = "199";         try {             text = text.concat(".5");             double decimal = Double.parseDouble(text);             text = Double.toString(decimal);             int status = (int) Math.ceil(Double.valueOf(text).doubleValue());             System.out.println(status);         } catch (NumberFormatException e) {             System.out.println("Invalid number");         }     } }

A. 199
B. 199.5 
C. 200
D. Invalid number

Check correct option.

Question-26. Which Of The Following Combinations Would The Below Program Print?

Java

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public class SimpleTest {       public static void main(String ags[]) {         String initial = "ABCDEFG", after = "";         after = initial = initial.replace('A', 'Z');         System.out.println(initial + ", " + after);     } }

A. ABCDEFG, ABCDEFG 
B. ABCDEFG, ZBCDEFG 
C. ZBCDEFG, ABCDEFG 
D. ZBCDEFG, ZBCDEFG

Check correct option.

Question-27. Which Of The Following Values Would The Below Java Coding Snippet Print?

Java

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public class SimpleTest {       public static void main(String args[]) {         String str = (String) returnStringAsArray()[-1 + 1 * 2];         System.out.println(str);     }       public static Object[] returnStringAsArray() {         return new String[] { "Java", "Quiz" };     } }

A. Java 
B. ArrayIndexOutOfBoundsException 
C. Quiz 
D. Compilation error

Check correct option.

Question-28. What Would The Below Java Coding Snippet Print On Execution?

Java

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public class SimpleTest {       public static void main(String args[]) {         try {             args[0] = "0";             return;           } catch (Exception e) {             System.out.print("Exception");         } finally {             System.out.print("Final");         }     } }

A. Exception 
B. Final 
C. ExceptionFinal 
D. Compilation error

Check correct option.

Question-29. What Does The Following Java Coding Snippet Print On Execution?

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public class SimpleTest {       public static void main(String[] args) {         int[] table = { 1, 2, 3, 4, 5 };         table[1] = (table[2 * 1] == 2 - args.length) ? table[3] : 99;         System.out.println(table[1]);     } }

A. Compilation fails. 
B. 3 
C. 2 
D. 99

Check correct option.

Question-30. What Would Be The Output Of The Below Java Coding Snippet Upon Execution?

Java

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import java.util.Random;   public class SimpleTest {       static int count = 0;       public static void main(String[] args) throws InterruptedException {         Consumer test = new Consumer();         Producer prod1 = new Producer(test, "thread-1");         Producer prod2 = new Producer(test, "thread-2");         prod1.start();         prod2.start();     } }   class Producer extends Thread {     Consumer test;     String message;       Producer(Consumer test, String msg) {         this.test = test;         message = msg;     }       public void run() {         Random rand = new Random();         int randomNum = rand.nextInt((1000 - 10) + 1) + 10;         System.out.println(message);     } }   class Consumer {     private int count = 0;       public int nextCounter() {         synchronized (this) {             count++;             return count;         }     } }

A. Runtime Exception 
B. thread-1 thread-2 
C. thread-2 thread-1 
D. Sometimes thread-2 will precede thread-1.

Check correct option.

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