Question 1

What is the keyword used to declare a function in C++?

Accepted Answer

void

Answer

int

Answer

char

Answer

double

Question 2

What is the purpose of a function prototype?

Accepted Answer

To declare the function before it is defined in the program.

Answer

To declare the function after it is used in the program.

Answer

To run the function at the beginning of the program.

Answer

To define the function within another function.

Question 3

What is the syntax for passing arguments by reference in a C++ function?

Accepted Answer

void functionName(int& arg)

Answer

void functionName(*int arg)

Answer

void functionName(int arg&)

Answer

void functionName(&int arg)

Question 4

What is the purpose of a return statement in a function?

Accepted Answer

To return a value back to the calling function.

Answer

To declare a new variable.

Answer

To exit the program.

Answer

To display a message on the screen.

Question 5

What is the difference between actual and formal parameters?

Accepted Answer

Actual parameters are the values passed to the function, while formal parameters receive the values passed.

Answer

There is no difference.

Answer

Actual parameters receive the values passed, while formal parameters are the values passed to the function.

Answer

Actual parameters are integers, while formal parameters are floats.

Question 6

What is the default return type for a C++ function?

Accepted Answer

int

Answer

double

Answer

char

Answer

void

Question 7

What is the syntax for declaring a function outside of the main() function in C++?

Accepted Answer

returnType functionName(parameters){}

Answer

int functionName(parameters) {}

Answer

void functionName(parameters) {}

Answer

functionName(parameters) {}

Question 8

What is the difference between a call by value and call by reference?

Accepted Answer

Call by value passes a copy of the actual parameter to the function, while call by reference passes the actual parameter itself.

Answer

Call by value passes the actual parameter to the function, while call by reference passes a copy of the actual parameter.

Answer

There is no difference between call by value and call by reference.

Answer

Call by value is only used for integers, while call by reference is used for all other variable types.

Question 9

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

Accepted Answer

To group a set of statements to perform a specific task.

Answer

To declare new variables.

Answer

To exit the program.

Answer

To display a message on the screen.

Question 10

What is the difference between a function declaration and a function definition in C++?

Accepted Answer

A function declaration only declares the return type, name, and parameters of a function, while a function definition includes the actual code for the function.

Answer

A function declaration includes the actual code for the function, while a function definition only declares the return type, name, and parameters of a function.

Answer

There is no difference between a function declaration and a function definition.

Answer

A function declaration includes the return type and name, while a function definition includes the parameters.

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