Control Structures - C Programming MCQ Questions and Answers

1

Which control structure is used to repeatedly execute a block of code in C?

A) for loop B) if statement C) switch case D) while loop

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Answer & Solution

Answer: Option D

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2

In C, what is the purpose of the 'break' statement within a loop?

A) Continue to the next iteration B) Exit the program C) Terminate the loop and exit it D) Skip the current iteration

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Answer & Solution

Answer: Option C

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3

What is the purpose of the 'else' statement in C's 'if-else' control structure?

A) Execute the 'if' block B) Execute the 'else' block C) Execute both 'if' and 'else' blocks D) Skip the 'if' block

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Answer & Solution

Answer: Option B

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4

Which control structure is used to make a decision between two or more alternatives in C?

A) switch case B) for loop C) if statement D) while loop

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Answer & Solution

Answer: Option C

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5

What is the result of the expression 5 > 3 && 4 < 6 in C?

A) TRUE B) FALSE C) 1 D) 0

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Answer & Solution

Answer: Option A

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6

In C, what happens if the 'default' case is missing in a 'switch' statement?

A) It causes a compilation error B) It has no effect C) It executes the 'default' case by default D) It generates a runtime error

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Answer & Solution

Answer: Option B

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7

What is the purpose of the 'continue' statement in C?

A) Skip the loop B) Exit the program C) Skip the current iteration D) Exit the loop

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Answer & Solution

Answer: Option C

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8

How many times will a 'do-while' loop execute its body if the condition is initially false in C?

A) 0 times B) 1 time C) Infinite times D) It depends on the loop body

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Answer & Solution

Answer: Option B

Solution:

In C, a do-while loop executes its body at least once, even if the condition is initially false. This is because the condition is evaluated after the body of the loop has been executed. If the condition is false after the first execution of the body, the loop terminates. Therefore, even if the condition is initially false, the loop body will execute once before the condition is evaluated.

So, the correct answer is Option B: 1 time.

9

What is the result of the expression !(5 == 5) in C?

A) TRUE B) FALSE C) 1 D) 0

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Answer & Solution

Answer: Option B

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10

In C, which control structure is used to iterate through a collection of items, such as an array or a list?

A) for loop B) if statement C) switch case D) while loop

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Answer & Solution

Answer: Option A

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