Computer Loop Constructs Test Online

Mustansar KhanLast Updated: October 15, 2025

Important Computer Loop Constructs Question and Answer

Total Questions:	35
Time Allowed:	20 Minutes
Total Marks:	35
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	ECAT Entry Test Computer Online Test Interview Questions about Computer All Universities Entrance Test Recruitments Tests

Loop Constructs Practice Test Online With Explanation

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1. Which loop is best when exit depends on user input?

do-while

for

switch

while

2. What is the purpose of the continue statement in a for loop?

Starts loop again

Ends the loop

Exits from program

Skips the rest of the loop for current iteration

3. Which of the following loops uses a post-test condition?

do-while

for

goto

while

4. Which loop structure is preferred when input is taken repeatedly until a condition is met?

do-while

while

switch

for

5. Which of the following is an infinite while loop?

while(i > 0)

Both B and C

while(true)

while(1)

6. Which of these can result in a compile-time error in a loop?

None

Infinite loop

Missing semicolon

No increment

7. What does the break statement do in a loop?

Ends the program

Restarts the loop

Exits the loop

Skips the next iteration

8. What is the scope of a loop variable declared inside a for loop?

Main function

Global

File scope

Within the loop block only

9. Which loop is best suited for menu-driven programs?

for

while

goto

do-while

10. Which of the following is not a loop construct in C?

repeat

while

do-while

for

11. Which of the following statements about loops is true?

Only for loops allow continue

Only while loops can use break

Loops cannot be nested

All loops must have an exit condition

12. Which keyword is used to terminate the program from inside a loop?

quit

abort

stop

exit()

13. Which function can be used to delay loop execution?

break()

pause()

hold()

sleep()

14. Which loop is more suitable when checking the condition at the beginning is necessary?

switch

for

do-while

while

15. Which keyword skips the current iteration and proceeds to the next?

skip

break

continue

exit

16. Which of the following is not necessary in a for loop?

Condition

Initialization

Increment

All are optional

17. Which control statement can be used inside any loop to force termination?

stop

continue

exit

break

18. Which loop allows declaration like this: for (int i = 0; ...)?

C89

K&R C

C90

C99

19. Which of the following is the syntax of a for loop?

for (condition; init; increment)

for (increment; condition; init)

for (init; increment; condition)

for (init; condition; increment)

20. Which of the following is true about the while loop?

Condition is checked before each iteration

Condition is checked after execution

It always executes once

It runs infinitely

21. Which of the following loops allows execution after the condition check?

for

None

while

do-while

22. Which keyword is used to skip the rest of the loop body and continue with the next iteration?

break

exit

continue

goto

23. Which of the following is a valid loop control structure?

jump

goto

continue

None

24. Which of the following is the correct way to create a reverse loop?

for (i = 0; i < n; i--)

for (i = n; i <= 0; i--)

for (i = n; i > 0; i++)

for (i = n; i >= 0; i--)

25. Which loop is guaranteed to execute at least once?

while

do-while

All of the above

for

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26. What is the initial value of a loop variable called?

Initialization

Condition

Iteration

Execution

27. What is an infinite loop?

A loop that never terminates

A loop that executes once

A loop that runs conditionally

A loop that ends at zero

28. Which of the following statements can be used to exit a loop?

break

continue

exit

return

29. In a for loop, which part is optional?

Increment

Condition

All of the above

Initialization

30. What is the main difference between while and do-while?

while executes at least once

do-while checks condition first

They are identical

do-while executes at least once

31. Which loop is most commonly used in iterating arrays?

do-while

switch

while

for

32. Which condition will cause an infinite loop?

i > 10

true

i != 10

i = i + 1

33. What is the default step size in a for loop?

34. Which loop type is preferred when the number of iterations is known?

while

for

do-while

goto

35. Which part of a for loop is executed only once?

Update

Condition

Body

Initialization

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Mustansar KhanLast Updated: October 15, 2025

Important Computer Loop Constructs Question and Answer

Loop Constructs Practice Test Online With Explanation

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