Deck 10: Introduction to Arrays

Question 1

The items in an array are called ____.

A) elements
B) values
C) variables
D) objects

Answer 1

A

Question 2

When an array is not full, one must replace the array's logical size with its physical length in the loop.

Answer 2

False

Question 3

When referring to an array element, the subscript operator is ____.

A) .
B) { }
C) [ ]
D) < >

Answer 3

C

Question 4

When referring to an array element, the method selector is ____.

A) .
B) { }
C) [ ]
D) < >

Question 5

Once an array is instantiated, its size cannot be changed. ____________________

Question 6

When setting up an array, you need to instantiate an array object and assign it to the array declaration. ____________________

Question 7

An item's position within an array is called its ____.

A) index
B) subscript
C) path
D) both a and b are true.

Question 8

In an array, the first element is numbered 1.

Question 9

Array variables are blank before they are assigned array objects. ____________________

Question 10

The JVM checks the values of subscripts before using them and throws an exception if they are out of bounds.

Question 11

Each array variable must be declared in its own statement.

Question 12

For any particular array, all of the elements must be of the same type.

Question 13

An array with elements numbered 0 to 99 has a length of 99. ____________________

Question 14

It is important to remember the length of an array when working with it.

Question 15

The basic syntax for referring to an array ____ has the form [].

A) length
B) element
C) name
D) initializer

Question 16

In order to set up an array, you need to declare an array variable.

Question 17

The index of an array cell ranges from 1 to the length of the array minus 1. ____________________

Question 18

To have two variables refer to two separate arrays that happen to contain the same values, copy all of the elements from one array to the other.

Question 19

The detection of a range-bound error is similar to the JVM's behavior when a program attempts to divide by zero.

Question 20

An enhanced for loop is simpler to write than a standard for loop with an index.

Question 21

Ravi must indicate an array's ____ in the loop when the array is not full.

A) logical size
B) first value
C) last value
D) physical length

Question 22

When an object is used as a(n) ____ to a method, what gets passed is a reference to the object and not the object itself.

A) variable
B) element
C) initializer
D) parameter

Question 23

To access the ____ cell in an array, use the expression .length - 1

A) first
B) last
C) second to last
D) None of the above

Question 24

Arrays can be declared, instantiated, and initialized in one step. The list of numbers between the braces is called a(n) ____________________ list.

Question 25

Arrays are ____ and must be instantiated before being used.

A) values
B) variables
C) objects
D) strings

Question 26

The Boolean variable ____ is used to break out of a loop if a particular number is in an array.

A) break
B) found
C) stop
D) true

Question 27

An array with 20 ints that receives 5 ints from interactive input has a(n) ____ size of 5.

A) actual
B) physical
C) logical
D) variable

Question 28

An array with 20 ints that receives 5 ints from interactive input has a(n) ____ size of 20.

A) actual
B) physical
C) logical
D) variable

Question 29

A(n) ____ loop visits each element in an array from the first position to the last position.

A) enhanced for
B) initializer
C) logical
D) parallel

Question 30

Organizing code into two classes called the ____ and the view splits the code between managing the interface and manipulating the database.

A) model
B) GUI
C) application
D) widget

Question 31

FIGURE 10-2
Alex is trying to find the first location of a value in the array. The variable loc initially equals ____.

A) null
B) -1
C) 0
D) 1

Question 32

FIGURE 10-2
In Figure 10-2 above, all of the following is true EXCEPT ____.

A) The method changes the student's name to Bill.
B) After the method finishes executing, the name is still Bill.
C) The actual and formal parameters do not refer to the same object.
D) Changes the method makes to the object's state are still in effect after the method terminates.

Question 33

The ____ symbol on a button in a GUI interface moves to the first record in the database and displays its data.

A) 1
B) <<
C) >>
D) <

Question 34

FIGURE 10-1
Figure 10-1 above shows ____.

A) two values referring to the same array variable
B) an array with two strings of values
C) an array with two names
D) two variables referring to the same array object

Question 35

The ____ symbol on a button in a GUI interface moves to the last record in the database and displays its data.

A) [end]
B) <<
C) >>
D) <

Question 36

The simplest way to add a data element to an array is to ____.

A) place it after the last available item
B) place it before the first available item
C) increase the physical size
D) increase the logical size

Question 37

A(n) ____________________ is a data structure consisting of an ordered collection of similar items.

Question 38

If you want to keep a list of peoples' names and ages, you can use two arrays in which corresponding elements are related by using ____ arrays.

A) logical
B) double
C) duplicate
D) parallel

Question 39

A(n) ____________________ is a loop that iterates through an array one element at a time.

Question 40

In a GUI, you should define a separate ____ class for each command button.

A) array
B) variable
C) listener
D) initializer

Question 41

When an array is instantiated, each cell is ____________________ until reset to a new object.

Question 42

Identify the letter of the choice that best matches the phrase or definition.
a.Index
b.Range
c.Null
d.Count
e.Break
A subscript of a value of -1 results in a(n) ____-bound error.

Question 43

Identify the letter of the choice that best matches the phrase or definition.
a.Index
b.Range
c.Null
d.Count
e.Break
An item's position in an array.

Question 44

Identify the letter of the choice that best matches the phrase or definition.
a.Index
b.Range
c.Null
d.Count
e.Break
Failure to assign an array object can result in a(n) ____ pointer exception.

Question 45

In a GUI, the ____________________ sets the title of the window, sets its closing action, and adds the widgets to the panels.

Question 46

Identify the letter of the choice that best matches the phrase or definition.
a.Index
b.Range
c.Null
d.Count
e.Break
This statement can be used to terminate an enhanced for loop early.

Question 47

Identify the letter of the choice that best matches the phrase or definition.
a.Index
b.Range
c.Null
d.Count
e.Break
This variable could be used to track the number of items input.