QUIZ ON OPERATORS & CONTROL STATEMENTS

Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?

• a) do-while
  
  
  

• b) while

• c) for

• d) none of the mentioned

What will be the output of the following Java program?

1. class selection_statements

2. {

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

4. {

5. int var1 = 5;

6. int var2 = 6;

7. if ((var2 = 1) == var1)

8. System.out.print(var2);

9. else

10. System.out.print(++var2);

11. }

12. }

• 1

• 2

• 3

• 4

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

1. class comma_operator

2. {

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

4. {

5. int sum = 0;

6. for (int i = 0, j = 0; i < 5 & j < 5; ++i, j = i + 1)

7. sum += i;

8. System.out.println(sum);

9. }

10. }

• 5

• 6

• 14

• compialtion error

What will be the output of the following Java program?

1. class Output

2. {

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

4. {

5. final int a=10,b=20;

6. while(a<b)

7. {

8.  

9. System.out.println("Hello");

10. }

11. System.out.println("World");

12.  

13. }

14. }

• Hello
  

• run time error

• Hello world

• compile time error

What would be the output of the following code snippet if variable a=10?

1. if(a<=0)

2. {

3. if(a==0)

4. {

5. System.out.println("1 ");

6. }

7. else

8. {

9. System.out.println("2 ");

10. }

11. }

12. System.out.println("3 ");

Which of these is returned by “greater than”, “less than” and “equal to” operators?

• Integers

• Floating – point numbers

• Boolean

• None of the mentioned

Which of these operators can skip evaluating right hand operand?
a) !

• 
  a) !
  

• b) |

• c) &

• d) &&

What will be the output of the following Java code?

1. class bool_operator

2. {

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

4. {

5. boolean a = true;

6. boolean b = !true;

7. boolean c = a | b;

8. boolean d = a & b;

9. boolean e = d ? b : c;

10. System.out.println(d + " " + e);

11. }

12. }

What will be the output of the following Java code?

1. class ternary_operator

2. {

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

4. {

5. int x = 3;

6. int y = ~ x;

7. int z;

8. z = x > y ? x : y;

9. System.out.print(z);

10. }

11. }

What is the difference between an entry controlled loop and an exit controlled loop?