What is the main purpose of functions in C++?

• To execute loops faster

• To reduce code redundancy and improve reusability

• To replace the main() function

• To speed up compilation

Which keyword defines a function that does not return a value?

• int

• return

• void

• float

How do you call a function in C++?

• functionName;

• functionName()

• call functionName();

• define functionName();

What is required in a function declaration?

• Function name and parameters

• Only the function body

• Function name, return type, and parameters (if any)

• Only the return type

What will happen if a function is declared but not called?

• It will cause a compilation error

• It will execute automatically

• Nothing will happen

• The program will crash

What is the default return type of a function in C++ if not specified?

• void

• int

• float

• char

Which of the following statements about function parameters is true?

• A function can only have one parameter

• Parameters are mandatory in all functions

• Parameters act as variables inside the function

• Parameters must be initialized in the function declaration

What is the correct way to define a function with two integer parameters?

• void function(int a, int b);

• function(int a, int b) {}

• int function(int a, int b) { return a + b; }

• void function() { int a, b; }

What is "pass by reference" in functions?

• Passing values by copying them

• Allowing a function to modify the original variable

• Passing only integer values

• Calling a function multiple times

Which function type returns a value?

• void function

• Function with no parameters

• Function with a return type

• Function with default parameters