Computer Decision Constructs Test Online

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Question 1

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

Answer

Fall-through occurs

Answer

Only default executes

Answer

Program terminates

Answer

Syntax error

Question 2

2. What is the purpose of the else block?

Answer

Checks a new condition

Answer

Terminates the loop

Answer

Executes when if is true

Answer

Executes when if is false

Question 3

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

Answer

case x + y:

Answer

case 1 + 1:

Question 4

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

Question 5

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

Answer

To exit the program

Answer

Skips the loop

Answer

Executes if no match is found

Question 6

6. What will be the output of:

Answer

t a = 5, b = 10;

Answer

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

Question 7

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

Answer

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

Answer

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

Answer

switch x { case 1: ... }

Answer

switch = x { case 1: ... }

Question 8

8. Can you nest switch statements?

Answer

Only two levels

Answer

Only with breaks

Question 9

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

Question 10

10. Which of the following is a ternary operator?

Question 11

11. What will this code print?

Answer

(!x) printf("Zero");

Question 12

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

Question 13

13. Which of the following is a relational operator?

Question 14

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

Answer

Return to main

Answer

Repeat the next case

Answer

Continue the next iteration

Answer

Exit the switch block

Question 15

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

Answer

Multiple ifs and one else

Answer

Only one if and one else

Answer

One if and multiple else

Answer

Multiple else without if

Question 16

16. Which data type is allowed in switch expression?

Answer

All of the above

Question 17

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

Question 18

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

Answer

if-else ladder

Question 19

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

Question 20

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

Answer

Cannot use with if

Question 21

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

Answer

Only the next statement belongs to if/else

Answer

Only one executes

Question 22

22. Which operator is used in ternary condition?

Question 23

23. Which operator gives highest precedence in decision making?

Question 24

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

Question 25

25. Can a switch statement handle strings?

Answer

Only with char

Answer

Only in C++

Question 26

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

Answer

Skip the switch

Answer

Acts like a comment

Answer

Run when no case matches

Answer

Run always

Question 27

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

Answer

No, only at the beginning

Answer

No, only at the end

Answer

Only after all cases

Answer

Yes, anywhere

Question 28

28. Which of these expressions is evaluated first?

Answer

a || b && c

Answer

a && b || c

Answer

a == b && c

Question 29

29. What is the output of this code?

Answer

(a) printf("True");

Answer

se printf("False");

Question 30

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

Question 31

31. Which of the following is a compound condition?

Answer

x == y && y == z

Question 32

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

Answer

int (0 or 1)

Question 33

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

Answer

if: condition { }

Answer

if = condition { }

Answer

if (condition) { }

Answer

if condition then { }

Question 34

34. What is the output of:

Answer

intf("Equal");

Question 35

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

Question 36

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

Question 37

37. Which of the following can be nested?

Answer

All of the above

Question 38

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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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