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Computer Decision Constructs Test Online

Mustansar KhanLast Updated: October 15, 2025

Important Computer Decision Constructs Question and Answer

Total Questions:	37
Time Allowed:	20 Minutes
Total Marks:	37
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Decision Constructs Practice Test Online With Explanation

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1. Which decision construct is used for true/false evaluation?

while

switch

2. What will this code print?

Nothing

Zero

(!x) printf("Zero");

3. Which of the following is a relational operator?

4. Which operator gives highest precedence in decision making?

5. Which of the following is used to select one option from multiple choices?

switch

do-while

goto

while

6. What will be the output of:

Error

intf("%d", a > b ? a : b);

t a = 5, b = 10;

7. Which of the following must be a constant expression in a switch case?

case 1 + 1:

case "A":

case x + y:

case a:

8. Which of the following is a compound condition?

x++;

x == y

x == y && y == z

9. Can you nest switch statements?

Only two levels

Only with breaks

Yes

10. Which construct is used for multi-way branching?

break

switch

if-else

11. Can a switch statement handle strings?

Only with char

Only in C++

Yes

12. What is the output of:

intf("Equal");

Equal

Error

(x == 10)

No output

13. Which of the following is a ternary operator?

while

if-else

? :

switch

14. Which operator is used in ternary condition?

15. Which of the following is used for decision-making in C?

while

for

16. What is the use of the default case in a switch?

Executes if no match is found

To test 0

To exit the program

Skips the loop

17. Which of the following cannot be used in a switch case label?

'A'

variable

100

18. How many else if clauses can be used after an if?

Cannot use with if

Only one

Up to two

Unlimited

19. Which data type is allowed in switch expression?

char

int

All of the above

enum

20. What is the correct syntax for a switch statement?

switch x { case 1: ... }

switch(x) { case 1: ... }

switch = x { case 1: ... }

switch[x] { case 1: ... }

21. Which of the following can be nested?

if-else

All of the above

switch

22. Which of the following is used to evaluate multiple conditions?

for

if-else ladder

continue

switch

23. Which of these expressions is evaluated first?

!a && b

a || b && c

a && b || c

a == b && c

24. What is the purpose of the break statement in a switch case?

Repeat the next case

Exit the switch block

Continue the next iteration

Return to main

25. What is the purpose of default in a switch?

Run always

Acts like a comment

Run when no case matches

Skip the switch

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26. Which operator is used for logical AND in C?

27. Can the default label appear anywhere in a switch block?

No, only at the end

No, only at the beginning

Only after all cases

Yes, anywhere

28. What happens if a break is omitted in a switch case?

Program terminates

Syntax error

Fall-through occurs

Only default executes

29. What happens when both if and else are without braces?

Only the next statement belongs to if/else

None

Only one executes

Error

30. Which of the following keywords is not part of decision-making in C?

case

repeat

else

31. Which is the default return type of a condition?

char

int (0 or 1)

float

string

32. Which of the following is the correct syntax of an if statement in C?

if = condition { }

if condition then { }

if: condition { }

if (condition) { }

33. Which keyword can transfer control to a label in C?

case

break

goto

continue

34. Which is true for a valid if-else block?

One if and multiple else

Only one if and one else

Multiple ifs and one else

Multiple else without if

35. What is the purpose of the else block?

Terminates the loop

Checks a new condition

Executes when if is true

Executes when if is false

36. Which operator is used for logical OR in C?

37. What is the output of this code?

Error

se printf("False");

True

(a) printf("True");

False

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Mustansar KhanLast Updated: October 15, 2025

Computer Decision Constructs Test Online

Important Computer Decision Constructs Question and Answer

Decision Constructs Practice Test Online With Explanation

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