Functions and Procedures in C++ MCQ question and answer with solution

1

What is the correct syntax for defining a function in C++?

A) returnType functionName(parameters) { body; } B) functionName(parameters) { returnType body; } C) functionName(returnType, parameters) { body; } D) returnType functionName(parameters, body) { }

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Answer: Option A

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2

What is the purpose of a function prototype in C++?

A) Determines the parameters of the function B) Specifies the return type of the function C) Provides the implementation of the function D) Declares the function before it is defined

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Answer: Option D

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3

Which keyword is used to define a function in C++ that does not return any value?

A) return B) null C) void D) None of the above

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Answer: Option C

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4

What is the correct way to call a function named "add" that takes two parameters in C++?

A) add(a, b); B) add(int a, int b); C) functionName = add(a, b); D) add.functionName(a, b);

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Answer: Option B

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5

What does the 'return' statement do in a function in C++?

A) Skips the remaining code in the function B) Returns a value from the function C) Restarts the function execution D) None of the above

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Answer: Option B

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6

What is the output of the following code: int sum(int a, int b) { return a + b; } cout << sum(3, 5); in C++?

A) 35 B) Compilation error C) 8 D) sum(3, 5)

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Answer: Option C

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7

Which of the following is true about function overloading in C++?

A) Only one function can have a specific name B) A function cannot be defined with the same name twice C) Function overloading is not supported in C++ D) Multiple functions can have the same name with different parameters

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Answer: Option D

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8

What is the purpose of default arguments in C++ functions?

A) Allows a function to be called without providing all arguments B) Sets a default return value for the function C) Defines default behavior for the function D) Specifies the default data type for parameters

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Answer: Option A

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9

What is the correct syntax for declaring a function prototype in C++?

A) returnType functionName(parameters); B) functionName(parameters) returnType; C) functionName returnType(parameters); D) None of the above

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Answer: Option A

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10

What is the purpose of passing arguments by reference in C++ functions?

A) Ensures the function receives correct arguments B) Reduces the memory consumption of the function C) Improves performance of the function D) Allows changes made to the arguments to reflect outside the function

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Answer: Option D

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Functions and Procedures in C++ MCQ question and answer with solution | C++ Programimg MCQs