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. Can a switch statement handle strings?

Yes

Only in C++

Only with char

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

goto

break

case

continue

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

4. Which of these expressions is evaluated first?

a && b || c

a || b && c

a == b && c

!a && b

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

switch

for

continue

if-else ladder

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

case 1 + 1:

case "A":

case a:

case x + y:

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

Only default executes

Syntax error

Program terminates

Fall-through occurs

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

for

while

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

None

Error

Only the next statement belongs to if/else

Only one executes

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

Yes, anywhere

No, only at the beginning

No, only at the end

Only after all cases

11. What is the output of:

Error

(x == 10)

Equal

No output

intf("Equal");

12. Which of the following is a relational operator?

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

Acts like a comment

Run when no case matches

Skip the switch

Run always

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

Multiple ifs and one else

One if and multiple else

Multiple else without if

Only one if and one else

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

16. 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: ... }

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

Exit the switch block

Return to main

Repeat the next case

Continue the next iteration

18. Which data type is allowed in switch expression?

int

char

enum

All of the above

19. Which operator gives highest precedence in decision making?

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

variable

100

'A'

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

while

switch

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

repeat

case

else

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

Unlimited

Up to two

Cannot use with if

Only one

24. Which operator is used in ternary condition?

25. What will this code print?

Nothing

(!x) printf("Zero");

Zero

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

if = condition { }

if (condition) { }

if condition then { }

if: condition { }

27. What is the purpose of the else block?

Checks a new condition

Executes when if is false

Terminates the loop

Executes when if is true

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

goto

switch

do-while

while

29. Can you nest switch statements?

Only with breaks

Yes

Only two levels

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

To test 0

Skips the loop

To exit the program

Executes if no match is found

31. What will be the output of:

t a = 5, b = 10;

Error

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

32. What is the output of this code?

se printf("False");

True

(a) printf("True");

Error

False

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

int (0 or 1)

float

string

char

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

if-else

break

switch

35. Which of the following is a compound condition?

x++;

x == y && y == z

x == y

36. Which of the following can be nested?

All of the above

if-else

switch

37. Which of the following is a ternary operator?

? :

if-else

while

switch

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Mustansar KhanLast Updated: October 15, 2025

Important Computer Decision Constructs Question and Answer

Decision Constructs Practice Test Online With Explanation

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