Control Flow Statements in C++ MCQ question and answer with solution

21

What is the output of the following code: int x = 5; switch (x) { case 1: cout << "One"; break; case 5: cout << "Five"; break; } in C++?

A) One B) Compilation error C) No output D) Five

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Answer & Solution

Answer: Option D

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22

What is the syntax for the 'for' loop in C++?

A) for (statement; initialization; condition; update) B) for { initialization; condition; update } { statement; } C) for (condition; update; initialization) { statement; } D) for (initialization; condition; update) { statement; }

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Answer & Solution

Answer: Option D

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23

What is the output of the following code: for (int i = 0; i < 3; ++i) { for (int j = 0; j < 2; ++j) { cout << i << j << " "; } } in C++?

A) 00 11 22 33 21 01 B) 00 10 20 01 11 22 C) 00 01 10 11 20 21 D) Compilation error

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Answer & Solution

Answer: Option C

Solution:

Solution:

The code contains a nested for loop structure.

The outer loop iterates with variable i from 0 to 2 (inclusive), and the inner loop iterates with variable j from 0 to 1 (inclusive).

For each iteration of the outer loop (each value of i), the inner loop runs completely, iterating through both values of j.

The output is printed as follows:

When i = 0:
j = 0 → output is 00
j = 1 → output is 01

When i = 1:
j = 0 → output is 10
j = 1 → output is 11

When i = 2:
j = 0 → output is 20
j = 1 → output is 21

Combining all outputs, the final result is:
00 01 10 11 20 21

24

What does the 'do' keyword represent in the 'do-while' loop syntax in C++?

A) Represents the loop initialization B) Represents the loop body C) Represents the loop incrementation D) None of the above

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Answer & Solution

Answer: Option B

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25

What is the syntax for the 'if' statement with multiple conditions in C++?

A) if { condition1 } && { condition2 } { statement; } B) if { condition1 && condition2 } { statement; } C) if (condition1 && condition2) { statement; } D) if (condition1) && (condition2) { statement; }

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Answer & Solution

Answer: Option C

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26

What will be the output of the following code: int x = 5; x > 2 ? cout << "Yes" : cout << "No"; in C++?

A) No B) 5 C) 2 D) Yes

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Answer & Solution

Answer: Option D

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27

In C++, what is the purpose of the 'do-while' loop?

A) Terminates the loop B) Executes a block of code only once C) Executes a block of code repeatedly until a condition becomes false D) Executes a block of code repeatedly until a condition becomes true

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Answer & Solution

Answer: Option C

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28

What will be the output of the following code: for (int i = 0; i < 5; ++i) { if (i == 3) continue; cout << i << " "; } in C++?

A) 0 1 2 3 4 B) 0 1 2 3 C) Compilation error D) 0 1 2 4

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Answer & Solution

Answer: Option D

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29

What is the syntax for the 'else if' statement in C++?

A) else if (condition) { statement; } B) if else (condition) { statement; } C) elseif (condition) { statement; } D) else (condition) { statement; }

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Answer & Solution

Answer: Option A

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30

What does the 'default' case represent in a 'switch' statement in C++?

A) Terminates the switch block B) Executes only when all other cases match C) Executes after every other case D) Executes when no other case matches

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Answer & Solution

Answer: Option D

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Control Flow Statements in C++ MCQ question and answer with solution | C++ Programimg MCQs