Java Program

1.What will be the output of following Java code?

public class Main { public static void main(String[] args) { String str = "Hello"; str = "Bye"; System.out.println(str); } }

• 1. Hello

• 1. Bye

• 1. Error

• 1. All of these

2.public class Main { public static void main(String arg[]) { int i; for (i = 1; i <= 12; i += 2) { if (i == 8) { System.out.println(i); break; } } } }

• 1. 1

• 1. No output

• 1. 8

• 1. 1357911

3.What will be the output of the following Java code?

1. class increment {

2. public static void main(String args[])

3. {

4. int g = 3;

5. System.out.print(++g * 8);

6. }

7. }

• a) 32
  

• b) 33
  

• c) 24
  

• d) 25

4.What will be the output of the following Java program?

1. class variable_scope

2. {

3. public static void main(String args[])

4. {

5. int x;

6. x = 5;

7. {

8. int y = 6;

9. System.out.print(x + " " + y);

10. }

11. System.out.println(x + " " + y);

12. }

13. }

• a) Compilation error
  

• b) Runtime error
  

• c) 5 6 5 6
  

• d) 5 6 5

5. 5.What will be the output of the following Java code snippet?

1. class abc

2. {

3. public static void main(String args[])

4. {

5. if(args.length>0)

6. System.out.println(args.length);

7. }

8. }

• a) The snippet compiles and runs but does not print anything
  

• b) The snippet compiles, runs and prints 0
  

• c) The snippet compiles, runs and prints 1
  

• d) The snippet does not compile

6.What will the following loop print?

for(int i = 0; i < 4; i++) { System.out.println(i); }

• • A.0 1 2

• • B.1 2 3

• • C.0 1 2 3

• • D.None

7.What is the output of this code?

int x = 1; while(x < 4) { System.out.println(x); x++; }

• • A.1 2 3

• • B.2 3 4

• • C.1 2 3 4

• • D.1

8.What will the following code output?

int[] arr = {1, 2, 3}; for(int num : arr) { System.out.println(num); }

• • A.1 2 3

• • B.123

• • C.Error

• • D.None

9.What will be the output of the following code snippet?

int a = 10; int b = 20; System.out.println(a + b);

• • A.10

• • B.20

• • C.30

• • D.Error

10.Identify the output.

boolean isJavaFun = true; System.out.println(!isJavaFun);

• • A.true

• • B.false

• • C.Error

• • D.null