Deck 6: Using Arrays

Question 1

With the foreach statement, what is used to automatically hold each array value through each iteration of the loop?

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

Answer 1

A

Question 2

What can be used to distinguish each element from the others in an array?

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

Answer 2

D

Question 3

What C# method should you use in order to arrange an array in ascending order?

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

Answer 3

D

Question 4

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

Question 5

In C#, what must an array subscript be?

A) a floating decimal value
B) a character value
C) an integer
D) a symbol

Question 6

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

Question 7

When you declare an object, what are the character fields set to?

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

Question 8

What operator is used for the purpose of creating objects in C#?

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

Question 9

What can you use to assign a list of nondefault values to array elements at declaration?

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

Question 10

What statement, supported by C#, allows you to cycle through every array element without using a subscript?

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

Question 11

What type of search is performed when each array element is examined in order?

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

Question 12

Given an array that has many possible matches of a search value, what is the most efficient strategy for placement of items?

A) The items should be sorted in ascending order.
B) The items should be sorted in descending order.
C) The items should be randomly sorted.
D) The items should be sorted with the most common items first.

Question 13

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

Question 14

When you declare an object, what are the numeric fields initialized to?

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

Question 15

Navigation through an entire array using a for or while loop can be done by varying a subscript from 0 to what value?

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

Question 16

What method can be used to find the array position of a requested value in an array by repeatedly splitting the list of objects until a match is found, but only if the array is sorted in ascending order?

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

Question 17

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

Question 18

An array subscript can be an expression, but only as long as the expression evaluates to what type?

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

Question 19

When you declare an object, what are the bool fields initialized to?

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

Question 20

In C#, arrays are objects.

Question 21

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

Question 22

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

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

Question 23

When an array is initialized with the double keyword, how large is each element of the array?

A) 1 byte
B) 8 bytes
C) 8 bits
D) 8 megabytes

Question 24

Describe the circumstances where you can use the foreach statement.

Question 25

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

Question 26

What method does not sort array elements, but rather rearranges their positions to the opposite order?

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

Question 27

Briefly describe the Reverse() method.

Question 28

What type of array has the same number of elements and corresponding data with another array?

A) twin array
B) shadow array
C) parallel array
D) shared array

Question 29

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

Question 30

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

Question 31

What will be the highest subscript value possible for an array with 15 elements?

A) 14
B) 15
C) 16
D) 17

Question 32

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

Question 33

What type of one-dimensional array contains another one-dimensional array in each element, with each array capable of being a different length?

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

Question 34

In order to use the Sort() method, what must the array name be passed to?

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

Question 35

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

Question 36

How can the Array methods such as BinarySearch() and Sort() be used without constantly referencing the Array class name?

A) Issue a using static System.Array(); statement.
B) Add include Array.*; to the beginning of your program.
C) Issue a using class Array; statement.
D) Place a copy of the System.dll file in your project.

Question 37

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?

Question 38

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

Question 39

What type of array utilizes the same number of columns in each row?

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

Question 40

When using an array in a GUI program, if array values will change based on user input, where must the array be stored?

A) It must be stored inside the method that processes the user's events.
B) It must be stored inside an event handler.
C) It must be stored outside the method that processes the user's events.
D) It must be stored outside of the main program.