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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.
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Loop Constructs Practice Test Online With Explanation

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

break

exit

continue

goto

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

Missing semicolon

None

No increment

Infinite loop

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

goto

continue

jump

None

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

switch

do-while

while

for

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

for (increment; condition; init)

for (condition; init; increment)

for (init; increment; condition)

for (init; condition; increment)

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

C99

C89

K&R C

C90

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

do-while

while

for

repeat

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

do-while

while

None

for

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

Exits the loop

Restarts the loop

Skips the next iteration

Ends the program

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

Main function

Within the loop block only

Global

File scope

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

Body

Initialization

Condition

Update

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

while

do-while

switch

for

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

return

exit

break

continue

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

sleep()

break()

pause()

hold()

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

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

stop

exit

continue

break

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

do-while

for

while

switch

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

switch

while

do-while

for

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

while

goto

for

do-while

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

do-while checks condition first

They are identical

while executes at least once

do-while executes at least once

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

do-while

goto

while

for

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

All are optional

Initialization

Condition

Increment

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

Condition is checked before each iteration

It always executes once

Condition is checked after execution

It runs infinitely

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

exit()

quit

stop

abort

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

break

continue

skip

exit

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26. What is an infinite loop?

A loop that never terminates

A loop that ends at zero

A loop that executes once

A loop that runs conditionally

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

do-while

for

while

goto

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

Ends the loop

Skips the rest of the loop for current iteration

Exits from program

Starts loop again

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

Initialization

Increment

Condition

All of the above

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

Loops cannot be nested

All loops must have an exit condition

Only for loops allow continue

Only while loops can use break

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

do-while

for

All of the above

while

32. Which condition will cause an infinite loop?

i = i + 1

true

i > 10

i != 10

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

Condition

Initialization

Execution

Iteration

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

while(1)

while(i > 0)

while(true)

Both B and C

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

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

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

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

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

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Mustansar KhanLast Updated: October 15, 2025

Computer Loop Constructs Test Online

Important Computer Loop Constructs Question and Answer

Loop Constructs Practice Test Online With Explanation

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