Ch.4

Question 1

In the function declaration shown, the mechanism used to call this function is known as:

double pow(double base, double exp);

Answer 1

call by value

Question 2

If you need to write a function that will compute the cost of some candy, where each piece costs 25 cents, which would be an appropriate function declaration?

Answer 2

int calculateCost(int count);

Question 3

What is the value of the following?

sqrt(sqrt(pow(2,4)));

Answer 3

2

Question 4

Using namespace std; tells the compiler

Answer 4

where to get the definitions of certain objects (variables).

Question 5

What is the output of the following program fragment?

cout ≤≤ static_cast ≤ float > (3/4) ≤≤ endl;

Answer 5

0.0

Question 6

What is the output of the following program fragment?

cout ≤≤ static_cast ≤ double > (3)/4 ≤≤ endl;

Answer 6

0.75

Question 7

Information Hiding is analogous to using

Answer 7

a black-box methodology.

Question 8

Which of the following functions is a properly overloaded function of the following?

int doSomething(int first, float second);

A) int doSomething(int first, int second, float third);

B) int doSomething( int next, float last);

C) int doSome(int first, float second);

D) float doSomething(int first, float second);

Answer 8

int doSomething(int first, int second, float third);

Question 9

If the variable x has the original value of 3.4, what is the value in x after the following?

cout << static_cast < int > (x);

Answer 9

3

Question 10

When the function below is called, the ________ of the actual parameters is passed to the function definition.

double sqrt(double value);

Answer 10

value

Question 11

If you have the following variable declaration in your program,

const int SIZE = 34;

then which of the following statements are legal?

Answer 11

cout << SIZE;

Question 12

The functions pow( ), sqrt( ), and fabs( ) are found in which include file?

Answer 12

cmath

Question 13

When overloading a function, what must be true?

A) The names should be different with the same number and/or types of parameters.

B) The names should be the same with the same number and/or types of parameters.

C) The names should be different with different number and/or types of parameters.

D) The names should be the same with different number and/or types of parameters.

Answer 13

The names should be the same with different number and/or types of parameters

Question 14

When parameters are passed between the calling code and the called function, parameters and arguments are matched by

Answer 14

their relative positions in the parameter and argument lists

Question 15

If you have the two functions as shown,

int someFunction(int value);

float someFunction(float value);

and a variable x, which is a double, which function is called by the following statement?

cout ≤≤ someFunction(x);

Answer 15

Nothing, it is a syntax error.

Question 16

When a variable is local to a function, we say that it has ________ of the function.

Answer 16

scope

Question 17

What is the value of x after the following code fragment executes?

float x = 36.0;

x = sqrt(x)

Answer 17

6.0

Question 18

The expression static_cast < double > (3) is called a

Answer 18

type cast

Question 19

What is the value returned by the following function?

int function( )

{

int value = 35;

return value + 5;

value += 10;

}

Answer 19

40

Question 20

What is the value of i after the following function call?

//function definition

int doSomething(int value)

{

value = 35;

return value;

value = 13

}

//fragment of main program

int i = 0;

cout << doSomething(i);

Answer 20

0

Question 21

In the following function declaration, the variable size is known as a ________.

int myFunction ( int size);

Answer 21

formal parameter

Question 22

Constant variables that might be used in different functions should be

Answer 22

global

Question 23

Write the code to convert the value in an integer variable named count to a double

Answer 23

static_cast<double>(count)</double>

Question 24

The absolute value function abs is located in the ________ library

Answer 24

stdio.h>

Question 25

The ________ of a variable is where that variable can be used.

Answer 25

scope

Question 26

Variables that are declared inside a function are said to be ________ to that function.

Answer 26

local

Question 27

Converting from one type to another is called ________.

Answer 27

type casting

Question 28

When you want to use a function in your program, you would make a function ________.

Answer 28

call or invocation

Question 29

Algorithms are typically described in ________.

Answer 29

pseudo code

Question 30

The ________ describes how the function will work.

Answer 30

body

Question 31

Function naming rules follow variable naming rules.

Answer 31

True

Question 32

Every include directive must be followed by using namespace std;

Answer 32

False

Question 33

The parameter names are mandatory in the function header.

Answer 33

False

Question 34

Functions may have multiple return statements.

Answer 34

True

Question 35

A function may return more than one item.

Answer 35

False

Question 36

Variables that are declared outside of any function body or parameter list are considered global.

Answer 36

True

Question 37

The parameters listed in the function declaration are considered global variables.

Answer 37

False