C++ Functions and Variables Quiz

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

• To define the function

• To terminate the program

• To return a value to the calling function

• To initialize variables

What is the return type of the pow function in C++?

• int

• float

• double

• void

Which of the following statements correctly defines a function that returns an integer value?

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

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

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

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

Which return type should be used if a function needs to return true or false?

• int

• double

• bool

• void

What is a characteristic of a local variable?

• It is accessible by all functions in a program.

• It retains its value between function calls.

• It exists only while the function is executing.

• It is automatically initialized to zero.

What happens to a local variable once a function ends?

• It retains its value.

• It gets destroyed.

• It becomes a global variable.

• It is automatically saved for future use.

What is the main reason to avoid using global variables?

• They make programs easier to debug.

• They increase execution speed.

• They make programs difficult to debug.

• They can only be used within the main function.

How are global constants different from global variables?

• Global constants cannot be modified after initialization.

• Global constants are local to functions.

• Global constants do not need to be initialized.

• Global constants are automatically assigned NULL.

What is the default value of an uninitialized global variable?

• NULL for all types

• 0 for numeric types and NULL for character types

• Random garbage value

• The last value assigned to it

What is a static local variable?

• A variable that is shared among multiple functions

• A variable that is initialized only once and retains its value between function calls

• A variable that can only be used in the main function

• A variable that must be initialized every time a function is called