Deck 8: Arrays

Question 1

To add up all the values in a two- dimensional array it would be best to use

A)one ^for loop
B)one sentinel controlled loop
C)two separate ^for loops
D)a nested ^for loop
E)no loop

Answer 1

D

Question 2

If the ^scores array is defined like this:

A)7
B)8
C)4
D)9
E)the first four scores

Answer 2

D

Question 3

When an array is passed to a function, it is actually _ the array that is/are passed.

A)the data type and size of
B)the value stored in the first element of
C)the starting memory address of
D)a copy of all the values in
E)none of the above

Answer 3

C

Question 4

To step through a one- dimensional array, accessing the elements one by one, it would be most appropriate to use loop.

A)a nested loop
B)an infinite
C)no
D)a sentinel controlled loop
E)a ^for loop

Question 5

If you leave out the size declarator in an array declaration

A)the array will contain no elements.
B)the value of each array element is set to a default value of 0.
C)the array size defaults to 100 elements.
D)the array cannot be created.
E)you must furnish an initialization list.

Question 6

An array can store a group of values, but the values must be

A)all the same data type.
B)numeric, not characters or strings.
C)declared at the time the array is created.
D)constants.
E)none of the above.

Question 7

By using the same you can build relationships between data stored in two or more arrays.

A)arguments
B)subscript
C)array name
D)data type
E)data

Question 8

The statement typedef int oneDArray[20];
Does which of the following?

A)creates an array of 20 integers
B)makes ^oneDArray an alias for a data type that holds 20 integers
C)creates a one- dimensional integer array with all elements initialized to 20
D)makes ^oneDArray a copy of another 20- integer array
E)none of the above

Question 9

You can assign the contents of one array to another by using

A)both array names.
B)the equality operator.
C)the assignment operator.
D)A and C together.
E)none of the above.

Question 10

When a relationship is established between two or more arrays by using the same subscript to relate entries between the arrays, the arrays are called arrays.

A)indexed
B)paired
C)parallel
D)linked
E)brother

Question 11

When you pass an array as an argument to a function, the function can modify the contents of the array.

Question 12

A two- dimensional array can be viewed as

A)a table with rows and columns.
B)two columns of indexes.
C)two rows of values.
D)any of the above.
E)none of the above.

Question 13

When an array is passed to a function, it is actually the array that is passed.

A)the data type and name of
B)a copy of all the values in
C)the starting memory address of
D)the value stored in the first element of
E)the data type and size of

Question 14

C++ allows array elements to be class objects provided they are all instances of the same class.

Question 15

To access an array element, use the array name and the element's

A)value.
B)name.
C)data type.
D)size declarator.
E)subscript.

Question 16

Subscript numbering in C++

A)can begin with a programmer- defined value.
B)automatically begins with zero.
C)can be set at run time.
D)automatically begins with one.
E)varies from program to program.

Question 17

The statement is an example of

A)an illegal array declaration.
B)an illegal array initialization.
C)data encapsulation.
D)default arguments.
E)implicit array sizing.

Question 18

Unlike regular variables, arrays can hold multiple

A)data types.
B)values.
C)variables.
D)named constants.
E)operators.

Question 19

A one- dimensional array can be initialized at the time it is defined, but a two- dimensional array cannot be.

Question 20

Assuming ^employee is an array of objects with a public member function named
^{setHourlyWage}, the following statement correctly calls this method for ^employee[2].

Question 21

The following statement adds a new element to a the ^department vector at index 25.

Question 22

The following statement is a valid C++ array definition.

Question 23

The amount of memory used by an array depends upon the array's data type and how many elements in the array currently have data stored in them.

Question 24

To assign the entire contents of one array to another, you can use the assignment operator.

Question 25

Each individual element of an array can be accessed by the array name and an element number, called a subscript.

Question 26

When you create a vector it is unnecessary to specify how many elements it will hold because it will expand in size as you add new values to it.

Question 27

The following statement initializes all five elements of the ^number array to 1.

Question 28

The amount of memory used by an array depends solely on the number of elements the array can hold.

Question 29

After carrying out the following two statements, ^sales will have been created as a one- dimensional array that can hold 20 ^double values.

Question 30

A one- dimensional array can only store elements of a single data type, but a two- dimensional array can hold data of two different data types.

Question 31

The following array definition is legal because C++ allows arrays to be implicitly sized.

Question 32

In C++ If you attempt to store more data in an array than it can hold, the compiler will issue an error.

Question 33

C++ allows a vector to be created with no elements in it.

Question 34

C++ allows arrays to have more than two dimensions.

Question 35

An element of a two- dimensional array is referenced by the array name and two subscripts, first the element row number and then the element column number.

Question 36

If a C++ program contains the following array definition

Question 37

An individual array element can be processed or passed to a function just like a regular C++ variable.