Computer Science
Multiple Choice
Questions
(MCQs) – Sets 46
with Detailed Explanations
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SET 46 – Computer Science MCQs
✅ No repetition from Sets 1–45
✅ 10 completely new questions
✅ Each explanation
Level: Class 9–10 / Beginners
1. What is continue statement?
A. Ends program
B. Stops loop permanently
C. Skips current iteration and continues loop
D. Causes error
✅ Correct Answer: C
Explanation:
The continue statement skips the remaining code of the current loop iteration and moves to the next iteration. It is useful when certain conditions should be ignored without stopping the entire loop. Continue helps improve loop control and program efficiency.
2. What is switch statement?
A. Loop statement
B. Output statement
C. Selection statement with multiple choices
D. Variable
✅ Correct Answer: C
Explanation:
The switch statement allows a program to select one execution path from many options based on a variable’s value. It is more readable than multiple if-else statements when handling many conditions, improving program clarity and performance.
3. What is case label in switch?
A. Loop condition
B. Variable name
C. Matching value in switch
D. Output format
✅ Correct Answer: C
Explanation:
A case label represents a specific value in a switch statement. When the switch expression matches the case value, the corresponding block of code executes. Case labels help organize multiple execution paths efficiently.
4. What is default case?
A. First case
B. Error case
C. Executes when no case matches
D. Loop exit
✅ Correct Answer: C
Explanation:
The default case executes when none of the defined case labels match the switch expression. It ensures that the program handles unexpected values, making the code more robust and error-resistant.
5. What is counter-controlled loop?
A. Loop without condition
B. Loop based on fixed count
C. Infinite loop
D. Conditional loop
✅ Correct Answer: B
Explanation:
A counter-controlled loop runs a specific number of times using a counter variable. It is commonly implemented using for loops. This type of loop is useful when the number of iterations is known in advance.
6. What is condition-controlled loop?
A. Loop with fixed count
B. Loop without exit
C. Loop based on condition
D. Selection structure
✅ Correct Answer: C
Explanation:
A condition-controlled loop continues execution as long as a specified condition remains true. While loops are common examples. These loops are ideal when the number of iterations is not known beforehand.
7. What is entry-controlled loop?
A. Condition checked after execution
B. Loop executes once
C. Condition checked before execution
D. Infinite loop
✅ Correct Answer: C
Explanation:
In an entry-controlled loop, the condition is checked before executing the loop body. If the condition is false initially, the loop body will not execute at all. For and while loops are entry-controlled loops.
8. What is exit-controlled loop?
A. Condition checked before loop
B. Loop never executes
C. Condition checked after execution
D. Selection structure
✅ Correct Answer: C
Explanation:
An exit-controlled loop checks its condition after executing the loop body at least once. This ensures the loop runs at least one time. The do-while loop is a common example of an exit-controlled loop.
9. What is loop variable?
A. Constant value
B. Data type
C. Variable controlling loop execution
D. Output variable
✅ Correct Answer: C
Explanation:
A loop variable controls the number of times a loop executes. It is usually initialized, tested, and updated within the loop. Proper management of loop variables prevents infinite loops and ensures correct program behavior.
10. What is block of statements?
A. Single instruction
B. Group of statements enclosed together
C. Variable
D. Error
✅ Correct Answer: B
Explanation:
A block of statements is a group of instructions treated as a single unit, usually enclosed within braces. Blocks are used in loops, conditionals, and functions to execute multiple statements together logically.
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