Chapter 7

Question 1

What is the difference between a size declarator and a subscript?

Answer 1

The size declarator is used in a definition of an array to indicate the number of elements the array will have.
A subscript is used to access a specific element in an array

Question 2

Look at the following array definition:

int values [10];

How many elements does the array have?

Answer 2

10

Question 3

Look at the following array definition:

int values [10];

What is the subscript of the first element in the array?
What is the subscript of the last element in the array?

Answer 3

0

9

Question 4

Look at the following array definition:

int values [10];

Assuming that an int uses four bytes of memory, how much memory does the array use?

Answer 4

40 bytes

Question 5

Why should a function that accepts an array as an argument, and processes that array, also accept an argument specifying the array size?

Answer 5

Because, with the array alone, the function has no way of determining the number of elements it has.

Question 6

How do you define an array without providing a size declarator?

Answer 6

By providing an initialization list. The array is sized to hold the number of values in the list

Question 7

Assuming that array1 and array 2 are both arrays, why is it not possible to assign the contents of array2 to array1 with the following statement?

array1 = array2;

Answer 7

An array name without brackets and a subscript represents the array’s beginning memory address. The statement shown attempts to assign the address of array2 to array1, which is not permitted.

Question 8

Is an array passed to a function by value or by reference?

Answer 8

By reference

Question 9

When you pass an array name as an argument to a function, what is actually being passed?

Answer 9

The array’s beginning memory address

Question 10

How do you establish a parallel relationship between two or more arrays?

Answer 10

By using the same subscript value for each array

Question 11

Look at the following array definition:

double sales [8] [10];

How many rows does the array have?
How many columns does the array have?
How many elements does the array have?

Answer 11

8 rows
10 columns
80 elements

Question 12

When writing a function that accepts a two-dimensional array as an argument, which size declarator must you provide in the parameter for the array?

Answer 12

The second size declarator, which is for the number of columns

Question 13

What advantages does a vector offer over an array?

Answer 13

1. you dont have to declare the number of elements that a vector will have
2. If you add a value to a vector that is already full, the vector will automatically increase its size to accommodate the new value
3. a vector can report the number of elements it contains

Question 14

The ______ indicates the number of elements, or values, an array can hold.

Answer 14

size declarator

Question 15

The size declarator must be a(n) ______ with a value greater than ______.

Answer 15

integer

0

Question 16

Each element in an array is accessed and indexed by a number known as a(n) ______.

Answer 16

subscript

Question 17

Subscript numbering in C++ always starts with ______.

Answer 17

0

Question 18

The number inside the brackets of an array definition is the ______, but the number inside an array’s brackets is an assignment statement, or any other statement that works with the contents of the array, is the ______.

Answer 18

size declarator

subscript

Question 19

C++ has no array ______ checking, which means you can inadvertently store data past the end of an array

Answer 19

bounds

Question 20

Starting values for an array may be specified with a(n) ______ list.

Answer 20

inititalization

Question 21

If an array is partially initialized, the uninitialized elements will be set to ______.

Answer 21

0

Question 22

If the size declarator of an array definition is omitted, c++ counts the number of items in the ______ to determine how large the array should be.

Answer 22

initialization list

Question 23

By using the same ______ for multiple arrays, you can build relationships between the data stored in the arrays.

Answer 23

subscript

Question 24

You cannot use the ____ operator to copy data from one array to another in a single statement.

Answer 24

assignment (=)

Question 25

Any time the name of the array is used without brackets and a subscript, it is seen as ______.

Answer 25

an address

Question 26

To pass an array to a function, pass the ______ of the array

Answer 26

address, or name

Question 27

A(n) ______ array is like several arrays of the same type put together

Answer 27

multi-demensional

Question 28

It is best to think of a two-dimensional array as having ______ and ______.

Answer 28

rows, columns

Question 29

To define a two-dimensional array, ______ size declarators are required

Answer 29

two

Question 30

When initializing a two-dimensional array, it helps to enclose each row’s initialization list in ______.

Answer 30

braces

Question 31

When initializing a two dimensional array, it helps to enclose each rows initialization list in ______.

Answer 31

braces

Question 32

When a two dimensional array is passed to a function the ______ size must be specified.

Answer 32

column

Question 33

The ______ is a collection of programmer defined data types and algorithms that you may use in your programs

Answer 33

Standard Template Library (STL)

Question 34

The two types of containers defined by the STL are ______ and ______.

Answer 34

sequence, associative

Question 35

The vector data type is a(n) ______ container.

Answer 35

sequence

Question 36

To define a vector in your program, you must #include the ______ header file.

Answer 36

vector

Question 37

To store a value in a vector that does not have a starting size, or that is already fill, use the ______ member function.

Answer 37

push_back

Question 38

To determine the number of elements in a vector, use the ______ member function.

Answer 38

size

Question 39

Use the ______ member function to remove the last element from a vector.

Answer 39

pop_back

Question 40

To completely clear the contents of a vector, use the ______ member function.

Answer 40

clear

Question 41

[T/F]

An array’s size declarator can be either a literal, named constant, or a variable.

Answer 41

False

Question 42

[T/F]
To calculate the amount of memory used by an array, multiply the number of elements by the number of bytes each element uses.

Answer 42

True

Question 43

[T/F]

The individual elements of an array are accessed and indexed by unique numbers.

Answer 43

True

Question 44

[T/F]

The first element in an array is accessed by the subscript 1.

Answer 44

False

Question 45

[T/F]
The subscript of the last element in a single dimensional array is one less than the total number of elements in the array.

Answer 45

True

Question 46

[T/F]

The contents of an array element cannot be displayed with cout.

Answer 46

False

Question 47

[T/F]

Subscript numbers may be stored in variables.

Answer 47

True

Question 48

[T/F]

You can write program that use invalid subscripts for an array.

Answer 48

True

Question 49

[T/F]

Arrays cannot be initialized when they are defined. A loop of other means must be used.

Answer 49

False

Question 50

[T/F]

The values in an initialization list are stored in the array in the order they appear in the list.

Answer 50

True

Question 51

[T/F]

C++ allows you to partially initialize an array.

Answer 51

True

Question 52

[T/F]

If an array is partially initialized, the uninitialized elements will contain “garbage.”

Answer 52

False

Question 53

[T/F]

If you leave an element uninitialized, you do not have to leave all the ones that follow it uninitialized.

Answer 53

False

Question 54

[T/F]

If you leave out the size declarator of an array definition, you do not have to include initialization list.

Answer 54

False

Question 55

[T/F]

The uninitialized elements of a string array will automatically be set to the value “0″

Answer 55

False

Question 56

[T/F]

You cannot use the assignment operator to copy one array’s contents to another in a single statement.

Answer 56

True

Question 57

[T/F]

When an array name is used without brackets and a subscript, it is seen as the value of the first element in the array.

Answer 57

False

Question 58

[T/F]

To pass an array to a function, pass the name of the array.

Answer 58

True

Question 59

[T/F]
When defining a parameter variable to hold a single dimensional array argument, you do not have to include the size declarator.

Answer 59

True

Question 60

[T/F]

When an array is passed to a function, the function has access to the original array.

Answer 60

True

Question 61

[T/F]

A two dimensional array is like several identical arrays put together.

Answer 61

True

Question 62

[T/F]

It’s best to think of 2D arrays as having rows and columns.

Answer 62

True

Question 63

[T/F]
The first size declarator (in the declaration of a 2D array) represents the number of columns. The second size definition represents the number of rows.

Answer 63

False

Question 64

[T/F]

2D arrays may be passed to functions, but the row size must be specified in the definition of the parameter variable.

Answer 64

False

Question 65

[T/F]

C++ allows you to create arrays with three or more dimensions.

Answer 65

True

Question 66

[T/F]

A vector is an associative container.

Answer 66

False

Question 67

[T/F]

To use a vector, you must include the vector header file.

Answer 67

True

Question 68

[T/F]

Vectors can report the number of elements they contain.

Answer 68

True

Question 69

[T/F]

You can use the [ ] operator to insert a value into a vector that has no elements.

Answer 69

False

Question 70

[T/F]
If you add a value to a vector that is already full, the vector will automatically increase its size to accommodate the new value.

Answer 70

True