Deck 8: Arrays

Question 1

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

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

Answer 1

A

Question 2

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

Answer 2

True

Question 3

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

Answer 3

False

Question 4

Which of the following statements correctly initialize the value variable?

A) int value = 8;
B) int value{8};
C) int value(8);
D) All of the above.
E) Both A and B, but not C.

Question 5

If a C++ program contains the following array definition
int score[10];
the following statement would store 100 in the first array element:
score[1] = 100;

Question 6

A two-dimensional array can be viewed as

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

Question 7

Which of the following statements will correctly carry out the operation stated in the comment to its right.

A) array 2 = array1 // Copy the elements of array 1 into array 2.
B) cout << array2 // Output the elements stored in array 2.
C) array2 = 5; // Place a 5 in each element of array2.
D) None of the above.
E) A and B, but not C.

Question 8

What does the following statement do?
Typedef int oneDArray[20];

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

Question 9

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 10

Unlike regular variables, arrays can hold multiple

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

Question 11

Arrays can be passed to functions, but individual array elements cannot be.

Question 12

The following statement for(int val : myArray)
Cout << val << " ";
Is an example of a(n)

A) regular for loop.
B) range-based for loop.
C) nested for loop.
D) infinite for loop.
E) illegal statement.

Question 13

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 14

The elements of an array can be

A) strings.
B) structures.
C) objects.
D) any of the above.
E) none of the above.

Question 15

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

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

Question 16

The statement int grades[ ] = { 100, 90, 99, 80 };
Is an example of

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

Question 17

If employee is an array of objects with a public member function named setHourlyWage, the following statement correctly calls this method for employee[2].
employee.setHourlyWage[2](20.00);

Question 18

The range-based for loop may be used with arrays, but not with vectors.

Question 19

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

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

Question 20

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

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

Question 21

If employee is an array of objects with a public member function named setHoursWorked, which of the following statements correctly calls that function for the employee object in array element 5?

A) employee.setHoursWorked[5] = 40;
B) employee[5].setHoursWorked = 40;
C) employee.setHoursWorked[5](40);
D) employee[5].setHoursWorked(40);
E) setHoursWorked(employee[5], 40);

Question 22

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

Question 23

The following two arrays string deptName[3] = {"Manufacturing", "Sales", "Business Office");
Double deptBudget[3] = {200000.0, 60000.0, 50000.0};
Are an example of ________ arrays.

A) two-dimensional
B) paired
C) linked
D) parallel
E) brother

Question 24

The following array definition is legal because C++ allows arrays to be implicitly sized.
int grades[ ];

Question 25

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

Question 26

If the scores array is defined like this: int scores[ ]= {4, 7, 4, 8, 9};
What will the following statement display?
Cout << scores[4];

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

Question 27

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

Question 28

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

Question 29

An array can be returned by a function as well as passed to a function.

Question 30

Subscript numbering in C++

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

Question 31

An array can store multiple values, but the values must be

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

Question 32

The amount of memory used by an array depends upon the array's data type and how many elements it can hold.

Question 33

The following statement is a valid C++ array definition.
double money[25.00];

Question 34

Elements of vectors can be access by using the vector name and a subscript, similarly to how array elements are accessed.

Question 35

Any of the following statements can be used to initialize the integer variable num to 7;
int num = 7;
int num(7);
int num{7};

Question 36

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

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

Question 37

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

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

Question 38

The size of an array is the number of elements that have data stored in them.

Question 39

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

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

Question 40

On each iteration of the following range-based for loop for (int element : myArray)
Cout << element << endl;
The variable element holds

A) an array value.
B) an array subscript.
C) an array name.
D) an array location.
E) none of the above.