Quiz8-Arrays

Question 1

Subscripts are used to identify specific elements in an array.(T/F)

Answer 1

True

Question 2

Unlike variables, arrays need to be initialized separately from the declaration. (T/F)

Answer 2

False

Question 3

Array bounds checking happens at runtime. (T/F)

Answer 3

True

Question 4

The first step when calculating the average of all values in an array is to get the sum of all the values. (T/F)

Answer 4

True

Question 5

If an array, names, consists of a list of usernames, then names[1] holds the value of the first username in the list. (T/F)

Answer 5

False

Question 6

Each element in a two-dimensional array has two subscripts. (T/F)

Answer 6

True

Question 7

To calculate the total of the values in an array. a loop is used with an accumulator variable. (T/F)

Answer 7

True

Question 8

An array, like a variable, can hold only one value. (T/F)

Answer 8

False

Question 9

It is usually much easier to process a large number of items in an array than to process a large number of items that are stored in separate variables. (T/F)

Answer 9

True

Question 10

The number of elements in an array is the value of the subscript of the last element in that array. (T/F)

Answer 10

False

Question 11

One drawback to the sequential search is that it cannot be used with an array that contains string elements. (T/F)

Answer 11

False

Question 12

The term “parallel array” is a synonym for a two-dimensional array. (T/F)

Answer 12

False

Question 13

An individual element in an array is identified by its ____________.

Answer 13

subscript

Question 14

A type of loop that exists in some programming languages specifically for stepping through an array and retreiving the value of each element is known as a ___________ loop.

A) Step
B) For Each
C) While Each

Answer 14

B) For Each

Question 15

____________ arrays are two or more arrays that hold related date where each element of one array has the same subscript as a corresponding element in the other arrays.

Answer 15

parallel arrays

Question 16

Two-dimensional arrays can be thought of as containing ___________.

Answer 16

rows and columns

Question 17

Every element in an array is assigned a unique number known as a(n) ______________.

Answer 17

subscript

Question 18

What is the term used for the number inside the brackets of an array that specifies how many values the array can hold?

Answer 18

size declarator

Question 19

When working with arrays, most programming languages perform ______________ to ensure that programs don’t use invalid subscripts.

Answer 19

array bounds checking

Question 20

What type of error occurs when a loop through an array iterates one time too few or one time too many?

A) runtime error
B) off-by-one error
C) validation error

Answer 20

B) off-by-one error

Question 21

How many subscripts do you need to access one element in a two-dimensional array?

Answer 21

Two

Question 22

In the following declaration, what is the data type of the elements in the array?

Declare Integer numbers[SIZE]

Answer 22

Integer

Question 23

Which of the following statements is true about this array declaration??

Declare Integer numbers[5] = 123,456,789,321,654

A) This is an error; there should be 6 integers in the array
B) This is an array declaration and initialization
C) None of these statements are true

Answer 23

B) This is an array declaration and initialization

Question 24

Given the following statement, what is the subscript for the data value 92?

Declare Integer numbers[5] = 83,92,78,94,61

Answer 24

1 is the subscript

Question 25

Which of the following array declarations would be best suited for storing prices of items sold in a store?

A) Declare Integer itemPrice[SIZE]

B) Declare Real itemPrice[SIZE]

C) Declare String itemPrice[SIZE]

Answer 25

B) Declare Real itemPrice[SIZE]

Question 26

What would display if following statements are coded and executed?

Declare Integer scores[3]= 76,94,83
Declare String names[3]= “Joe”,”Amy”,”Pat”
Display names[1]
Display “Your test score is: “
Display scores[2]

A) Joe Your test score is: 94

B) Amy your test score is: 94

C) Amy your test score is: 83

Answer 26

C) Amy your test score is: 83

Question 27

Which is the correct way to pass an array named studentScores that holds 25 values to a function named getAverage and save the result to a variable named average?

A) Set average=getAverage (studentScores, 25)

B) Set getAverage = average(studentScores[25])

C) Set average = getAverage(studentScores)

Answer 27

A) Set average = getAverage(studentScores,25)

Question 28

Given the following array declaration, what value is stored in testScores[2][0]
Declare Integer testScores[3][3]=
66, 77, 88
98, 87, 76
65, 74, 89

Answer 28

65