Deck 6: Using Arrays

Question 1

Arrays are useful when you need to store just one value in memory at a time.

Answer 1

False

Question 2

The ____ operator is used to create objects.

A) new
B) save
C) initialize
D) reserve

Answer 2

A

Question 3

When you declare objects, their numeric fields initialize to ____.

A) null
B) '\u0000'
C) 0
D) false

Answer 3

C

Question 4

The ____ method arranges array items in ascending order.

A) Reverse()
B) BinarySearch()
C) Order()
D) Sort()

Question 5

You can assign nondefault values to array elements at declaration by specifying a list of values called a(n) ____.

A) value specification
B) array specification
C) initializer list
D) array initializer

Question 6

An array subscript can be an expression, as long as the expression evaluates to type ____.

A) int
B) float
C) double
D) boolean

Question 7

You can easily navigate through arrays using a for or while loop that varies a subscript from 0 to ____.

A) Array.Length - 2
B) Array.Length - 1
C) Array.Length
D) Array.Length + 1

Question 8

In C#, an array's elements are numbered beginning with 1.

Question 9

A search in which each array element is examined in order is called a ____ search.

A) sequential
B) parallel
C) binary
D) range match

Question 10

When you declare objects, their character fields initialize to ____.

A) ' '
B) false
C) 0
D) null

Question 11

In C#, arrays are objects.

Question 12

The ____ method can find the array position of a requested value in an array that is sorted with its elements in ascending order.

A) Sort()
B) BinarySearch()
C) Reverse()
D) IndexOf()

Question 13

When you instantiate an array, you can choose its location in memory.

Question 14

The power of arrays becomes apparent when you use subscripts that are variables rather than constant values.

Question 15

When you declare objects, their bool fields initialize to ____.

A) null
B) false
C) true
D) '\u0000'

Question 16

C# supports a ____ statement that you can use to cycle through every array element without using a subscript.

A) for
B) while
C) do-while
D) foreach

Question 17

With the foreach statement, you provide a temporary ____ that automatically holds each array value in turn.

A) iteration variable
B) index holder
C) subscript holder
D) iteration holder

Question 18

You can distinguish each element from the others in an array with a(n) ____.

A) element operator
B) object location
C) element ID
D) subscript

Question 19

In C#, an array subscript must be type ____.

A) float
B) char
C) int
D) double

Question 20

In an array that has many possible matches of a search value, the most efficient strategy is to place the ____ items first.

A) lowest
B) most unusual
C) highest
D) most common

Question 21

When you instantiate an array, you are creating a specific instance of a class that derives from the built-in class named ____________________.

Question 22

The list of values provided for an array is a(n) ____________________.

Question 23

A ____ array is a one-dimensional array in which each element is another one-dimensional array and each array can be a different length.

A) rectangular
B) matrix
C) jagged
D) table

Question 24

How can you assign nondefault values to array elements when the array is declared? Give an example.

Question 25

Explain how to use a for loop to perform an arithmetic operation on each element in an array.

Question 26

When using an array in a GUI program, if array values will change based on user input, the array must be ____ any method that reacts to the user's event.

A) stored inside
B) reset to 0 in
C) stored outside
D) redeclared in

Question 27

The ____________________ property is a member of the System.Array class and automatically holds an array's length.

Question 28

In a ____ array, each row has the same number of columns.

A) vector
B) rectangular
C) list
D) linear

Question 29

Briefly describe the Reverse() method.

Question 30

A(n) ____________________ array has the same number of elements as an existing array and uses the same subscript to access additional information.

Question 31

Describe the circumstances where you can use the foreach statement.

Question 32

Explain how to use a for loop to search an array for an exact match.

Question 33

To use the Sort() method, you pass the array name to ____.

A) List.Sort()
B) Collections.Sort()
C) Array.Sort()
D) Sort.Sort()

Question 34

A(n) ____________________ is an integer contained within square brackets that indicates the position of one of an array's elements.

Question 35

Under what circumstances does the BinarySearch() method prove inadequate?

Question 36

Explain how to assign a value to a specific array element and how to print it.

Question 37

How can you change the size of an array in C#?

Question 38

Write a small program that uses the Sort() method to sort an array of names into alphabetical order.

Question 39

The ____ method does not sort array elements; it only rearranges their positions to the opposite order.

A) BinarySearch()
B) Opposite()
C) Reverse()
D) Order()

Question 40

An array that you can picture as a column of values, and whose elements you can access using a single subscript, is a ____ array.

A) two-dimensional
B) jagged
C) rectangular
D) single-dimensional

Question 42

Describe the main characteristics of two-dimensional arrays. How do you access an element in a two-dimensional array? What are some synonyms for a two-dimensional array?