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

None

for

while

do-while

2. What is an infinite loop?

A loop that runs conditionally

A loop that ends at zero

A loop that never terminates

A loop that executes once

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

Increment

Condition

All are optional

Initialization

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

repeat

while

do-while

for

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

for

All of the above

do-while

while

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

Infinite loop

None

No increment

Missing semicolon

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

It always executes once

Condition is checked before each iteration

Condition is checked after execution

It runs infinitely

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

do-while checks condition first

while executes at least once

do-while executes at least once

They are identical

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

for (init; condition; increment)

for (increment; condition; init)

for (init; increment; condition)

for (condition; init; increment)

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

C90

C99

C89

K&R C

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

Main function

Within the loop block only

Global

File scope

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

Increment

All of the above

Initialization

Condition

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

while(1)

while(true)

while(i > 0)

Both B and C

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

switch

do-while

for

while

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

Body

Initialization

Condition

Update

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

for

while

switch

do-while

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

for

goto

do-while

while

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

break()

hold()

sleep()

pause()

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

Condition

Execution

Initialization

Iteration

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

skip

continue

exit

break

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

abort

exit()

quit

stop

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

for

do-while

switch

while

23. 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 = 0; i < n; i--)

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

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

for

switch

while

do-while

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

continue

jump

goto

None

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

Ends the loop

Skips the rest of the loop for current iteration

Starts loop again

Exits from program

27. Which condition will cause an infinite loop?

i = i + 1

i > 10

i != 10

true

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

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

do-while

goto

while

for

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

Skips the next iteration

Exits the loop

Ends the program

Restarts the loop

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

while

goto

for

do-while

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

exit

break

continue

goto

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

break

continue

stop

exit

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

Loops cannot be nested

Only while loops can use break

Only for loops allow continue

All loops must have an exit condition

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

exit

break

continue

return

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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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