Chapter 6 Functions

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This is a collection of statements that performs a specific task.
A) infinite loop
B) variable
C) constant
D) function
E) None of these

D

A function ________ contains the statements that make up the function.
A) definition
B) prototype
C) call
D) expression
E) parameter list

A

A function can have zero to many parameters, and it can return this many values.
A) zero to many
B) no
C) only one
D) a maximum of ten
E) None of these

C

A function is executed when it is:
A) defined
B) prototyped
C) declared
D) called
E) None of these

D

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

E

Functions are ideal for use in menu-driven programs. When a user selects a menu item, the program can ________ the appropriate function.
A) call
B) prototype
C) define
D) declare
E) None of these

A

This type of variable is defined inside a function and is not accessible outside the function.
A) global
B) reference
C) local
D) counter
E) None of these

C

The value in this type of local variable persists between function calls.
A) global
B) internal
C) static
D) dynamic
E) None of these

C

These types of arguments are passed to parameters automatically if no argument is provided in the function call.
A) Local
B) Default
C) Global
D) Relational
E) None of these

B

When used as parameters, these types of variables allow a function to access the parameter’s original argument.
A) reference
B) floating-point
C) counter
D) undeclared
E) None of these

A

This statement causes a function to end.
A) end
B) terminate
C) return
D) release
E) None of these

C

________ functions may have the same name, as long as their parameter lists are different.
A) Only two
B) Two or more
C) Zero
D) Un-prototyped
E) None of these

B

This function causes a program to terminate, regardless of which function or control mechanism is executing.
A) terminate()
B) return()
C) continue()
D) exit()
E) None of these

D

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;

A) 1 2 3
B) 1 6 3
C) 3 6 3
D) 1 14 9
E) None of these

B

This is a statement that causes a function to execute.
A) for loop
B) do-while loop
C) function prototype
D) function call
E) None of these

D

It is a good programming practice to ________ your functions by writing comments that describe what they do.
A) execute
B) document
C) eliminate
D) prototype
E) None of these

B

A(n) ________ is information that is passed to a function, and a(n) ________ is information that is received by a function.
A) function call, function header
B) parameter, argument
C) argument, parameter
D) prototype, header
E) None of these

C

Which of the following statements about global variables is true?
A) A global variable is accessible only to the main function.
B) A global variable is declared in the highest-level block in which it is used.
C) A global variable can have the same name as a variable that is declared locally within a function.
D) If a function contains a local variable with the same name as a global variable, the global variable’s name takes precedence within the function.
E) All of these are true.

C

A function ________ eliminates the need to place a function definition before all calls to the function.
A) header
B) prototype
C) argument
D) parameter
E) None of these

B

A ________ variable is declared outside all functions.
A) local
B) global
C) floating-point
D) counter
E) None of these

B

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.
A) persist
B) execute
C) communicate
D) change
E) None of these

A

A ________ argument is passed to a parameter when the actual argument is left out of the function call.
A) false
B) true
C) null
D) default
E) None of these

D

If a function does not have a prototype, default arguments may be specified in the function ________.
A) call
B) header
C) execution
D) return type
E) None of these

B

EXIT_FAILURE and ________ are named constants that may be used to indicate success or failure when the exit() function is called.
A) EXIT_TERMINATE
B) EXIT_SUCCESS
C) EXIT_OK
D) RETURN_OK
E) None of these

B

The value in a ________ variable persists between function calls.
A) dynamic
B) local
C) counter
D) static local

D

This is a dummy function that is called instead of the actual function it represents.
A) main function
B) stub
C) driver
D) overloaded function

B

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;
}

A) 2
2

B) 4
2

C) 2
4

D) 4
4

B

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;
}

A) 2
0
2

B) 2
2
2

C) 0
0
0

D) 2
0
0

A

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;
}

A) 2
0
2

B) 2
2
2

C) 0
0
0

D) 2
0
0

D

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 }

A) 4
B) 6
C) 10
D) 15

A

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 }

A) 4
B) 6
C) 10
D) 15

D

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 }

A) 4
B) 6
C) 10
D) 15

C

Look at the following function prototype.

int myFunction(double);

What is the data type of the function’s parameter variable?
A) int
B) double
C) void
D) Can’t tell from the prototype

B

Look at the following function prototype.

int myFunction(double);

What is the data type of the function’s return value?
A) int
B) double
C) void
D) Can’t tell from the prototype

A

Look at the following function prototype.

int myFunction(double, double, double);

How many parameter variables does this function have?
A) 1
B) 2
C) 3
D) Can’t tell from the prototype

C

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;
}

A) 5
B) 2
C) 7
D) "getValue(x)"

C

Here is the header for a function named computeValue:

void computeValue(int value)

Which of the following is a valid call to the function?
A) computeValue(10)
B) computeValue(10);
C) void computeValue(10);
D) void computeValue(int x);

B

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