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Computer Loop Constructs Test Online

Mustansar KhanLast Updated: October 15, 2025

Start your preparation for Computer Loop Constructs Test Online. This online test contains important MCQs from past papers. Attempting this test will help you prepare for Annual Exams and Entry Tests. Read the questions carefully and select the correct option below to see your result.

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

while executes at least once

They are identical

do-while checks condition first

do-while executes at least once

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

switch

do-while

while

for

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

do-while

while

goto

for

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

switch

do-while

while

for

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

while

None

do-while

for

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

Within the loop block only

Global

File scope

Main function

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

while

do-while

for

All of the above

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

jump

goto

None

continue

9. Which condition will cause an infinite loop?

i != 10

i > 10

i = i + 1

true

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

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

switch

while

for

do-while

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

Execution

Iteration

Condition

Initialization

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

Condition is checked before each iteration

It runs infinitely

It always executes once

Condition is checked after execution

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

abort

exit()

quit

stop

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

Restarts the loop

Ends the program

Skips the next iteration

Exits the loop

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

for (condition; init; increment)

for (init; increment; condition)

for (init; condition; increment)

for (increment; condition; init)

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

Condition

Increment

Initialization

All are optional

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

C90

K&R C

C99

C89

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

pause()

hold()

break()

sleep()

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

for

while

do-while

goto

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

Only for loops allow continue

All loops must have an exit condition

Only while loops can use break

Loops cannot be nested

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

while

for

goto

do-while

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

continue

exit

return

break

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

stop

break

exit

continue

25. What is an infinite loop?

A loop that executes once

A loop that never terminates

A loop that runs conditionally

A loop that ends at zero

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

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

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

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

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

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

Condition

Update

Initialization

Body

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

repeat

while

do-while

for

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

No increment

Infinite loop

Missing semicolon

None

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

while(true)

Both B and C

while(i > 0)

while(1)

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

Starts loop again

Skips the rest of the loop for current iteration

Ends the loop

Exits from program

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

skip

exit

break

continue

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

exit

break

goto

continue

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

do-while

for

switch

while

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

All of the above

Condition

Initialization

Increment

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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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Study Plan for Computer Loop Constructs Test Online

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