Question

1. A global variable is a variable that’s defined

Group of answer choices

within any block of code

within any function

outside of any function

within a header file

2.

Which of the following is/are differences between value variables and reference variables?

Group of answer choices

A value variable stores a copy of a value in memory, and a reference variable refers to a value that already exists in memory.

Changing the value of a value variable doesn’t change the value of any other variables, but changing the value of a reference variable also changes the values of any other variables that refer to that value.

A value variable can be used as a parameter for a function but a reference variable can’t.

All of the above

a and b only

3.

Which of the following should you code in the implementation file for a header file?

Group of answer choices

using directives or declarations

function declarations

variables definitions

all of the above

a and c only

4.

The purpose of a function prototype is to

Group of answer choices

declare a function

provide the code for a function

define the default values for the arguments that are passed to a function

provide for overloading a function

5.

Which of these function declarations is not a valid overload for the following function declaration?
double calculate_mpg(double miles, double gallons);

Group of answer choices

double calculate_mpg(double miles, double gallons, int decimal_places);

double calculate_mpg(int miles, int gallons);

double calculate_mpg(int miles, int gallons, int decimal_places);

int calculate_mpg(double miles, double gallons);

Answer 1

1)  outside of any function
2)  a and b only
3)  a and c only    (not 100% sure about this one)
4)  declare a function
5)  int calculate_mpg(double miles, double gallons);