flow control

1.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 ");

• a) 1 2
  
  

• b) 2 3
  

• c) 1 3
  

• d) 3

2. What is true about a break?

• a) Break stops the execution of entire program
  

• b) Break halts the execution and forces the control out of the loop
  

• c) Break forces the control out of the loop and starts the execution of next iteration
  

• d) Break halts the execution of the loop for certain time frame

3.What is true about do statement?

• a) do statement executes the code of a loop at least once
  

• b) do statement does not get execute if condition is not matched in the first iteration
  

• c) do statement checks the condition at the beginning of the loop
  

• d) do statement executes the code more than once always

4.What is the valid data type for variable “a” to print “Hello World”?

1. 
   switch(a)

2. {

3. System.out.println("Hello World");

4. }

• a) int and float
  

• b) byte and short
  

• c) char and long
  

• d) byte and char

5.Which of these are selection statements in Java?

• a) if()
  

• b) for()
  

• c) continue
  

• d) break

6.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

7.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. }

• a) 1
  

• b) 2
  

• c) 3
  

• d) 4

8.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. }

• a) 5
  

• b) 6
  

• c) 14
  

• d) compilation error

9.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. }

• a) Hello
  

• b) run time error
  

• c) Hello world
  

• d) compile time error

10. Which of these selection statements test only for equality?

• a) if
  

• b) switch
  

• c) if & switch
  

• d) none of the mentioned