ITSC Quiz 5

What is the output of the following program? #include <iostream> using namespace std; int getValue(int); int main() { int x = 2; cout << getValue(x) << endl; return 0; } int getValue(int num) { return num + 5; }

7

True/False: A local variable and a global variable may not have the same name within the same program.

False

True/False: When a function is called, flow of control moves to the function's prototype.

False

True/False: It is possible for a function to have some parameters with default arguments and some without.

True

________ functions may have the same name, as long as their parameter lists are different.

Two or more

Here is the header for a function named computeValue: void computeValue( int value ) Which of the following is a valid call to the function?

computeValue(10);

A function ________ eliminates the need to place a function definition before all calls to the function.

prototype

This statement causes a function to end.

return

What is the output of the following program? #include <iostream> using namespace std; void doSomething(int&); int main() { int x = 2; cout << x << endl; doSomething(x); cout << x << endl; return 0; } void doSomething(int& num) { num = 0; cout << num << endl; }

2 0 0

Given the following function definition: void calc (int a, int& b) { int c; c = a + 2; a = a * 3; b = c + a; } What is the output of the following code fragment that invokes calc? int x = 1; int y = 2; int z = 3; calc(x, y); cout << x << " " << y << " " << z << endl;

1 6 3

Which line in the following program contains the header for the showDub function? 1 #include <iostream> 2 using namespace std; 3 4 void showDub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showDub(x); 11 cout << x << endl; 12 return 0; 13 } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

15

What is the output of the following program? #include <iostream> using namespace std; void doSomething(int); int main() { int x = 2; cout << x << endl; doSomething(x); cout << x << endl; return 0; } void doSomething(int num) { num = 0; cout << num << endl; }

2 0 2

Look at the following function prototype. int myFunction(double, double, double); How many parameter variables does this function have?

3

Which line in the following program contains the prototype for the showDub function? 1 #include <iostream> 2 using namespace std; 3 4 void showDub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showDub(x); 11 cout << x << endl; 12 return 0; 13 } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

4

What is the output of the following program? #include <iostream> using namespace std; void showDub(int); int main() { int x = 2; showDub(x); cout << x << endl; return 0; } void showDub(int num) { cout << (num * 2) << endl; }

4 2

These types of arguments are passed to parameters automatically if no argument is provided in the function call.

Default

True/False: A function's return data type must be the same as the function's parameter(s).

False

In a function header, you must furnish:

a. data type(s) of the parameters b. data type of the return value c. the name of function d. names of parameter variables e. All of these

A ________ is information that is passed to a function, and a ________ is information that is received by a function.

argument, parameter

Functions are ideal for use in menu-driven programs. When a user selects a menu item, the program can ________ the appropriate function.

call

A function is executed when it is:

called

A ________ argument is passed to a parameter when the actual argument is left out of the function call.

default

A function ________ contains the statements that make up the function.

definition

It is a good programming practice to ________ your functions by writing comments that describe what they do.

document

This function causes a program to terminate, regardless of which function or control mechanism is executing.

exit()

This is a collection of statements that performs a specific task.

function

This is a statement that causes a function to execute.

function call

A ________ variable is declared outside all functions.

global

If a function does not have a prototype, default arguments may be specified in the function ________.

header

Look at the following function prototype. int myFunction(double); What is the data type of the funtion's return value?

int

This type of variable is defined inside a function and is not accessible outside the function.

local

A function can have zero to many parameters, and it can return this many values.

only one

If a function is called more than once in a program, the values stored in the function's local variables do not ________ between function calls.

persist

When used as parameters, these types of variables allow a function to access the parameter's original argument.

reference

The value in this type of local variable persists between function calls.

static

The value in a ________ variable persists between function calls.

static local

This is a dummy function that is called instead of the actual function it represents.

stub

Which of the following statements about global variables is true?

A global variable can have the same name as a variable that is declared locally within a function.

Which line in the following program contains a call to the showDub function? 1 #include <iostream> 2 using namespace std; 3 4 void showDub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showDub(x); 11 cout << x << endl; 12 return 0; 13 } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

10

True/False: A parameter is a special-purpose variable that is declared inside the parentheses of a function definition.

True