CSC Exam 2

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This is the typical number of comparisons performed by the sequential search on an array of N elements ( assuming the search values are consistently found).

N/ 2

All classes directly or indirectly inherit from this class.

Object

Assuming the following declaration exists: enum Seasons { SPRING, WINTER, SUMMER, FALL } what is the fully qualified name of the FALL constant?

Seasons. FALL

You cannot use the fully qualified name of an enum constant for this.

a case expression

When an object is passed as an argument to a method, this is actually passed.

a reference to the object

This is a method that gets a value from a class's field, but does not change it.

accessor

To insert an item at a specific location in an ArrayList object, you use this method. a. store b. insert c. d. get

add

Making an instance of one class a field in another class is called ___________.

aggregation

In a subclass constructor, a call to the superclass constructor must __________ .

appear as the very first statement

Abstract classes cannot __________ .

be instantiated

This search algorithm repeatedly divides the portion of an array being searched in half.

binary search

The process of matching a method call with the correct method is known as __________.

binding

A class is analogous to a( n) __________.

blueprint

Fields in an interface are __________ .

both final and static

When initializing a two- dimensional array, you enclose each row's initialization list in ___________. a. b. parentheses c. brackets d. quotation marks

braces

This is a collection of programming statements that specify the fields and methods that a particular type of object may have.

class

This is a method that is automatically called when an instance of a class is created.

constructor

This is automatically provided for a class if you do not write one yourself.

default constructor

With this type of binding, the Java Virtual Machine determines at runtime which method to call, depending on the type of the object that a variable references.

dynamic

This key word indicates that a class inherits from another class.

extends

This is a class member that holds data.

field

If a class has this method, it is called automatically just before an instance of the class is destroyed by the Java Virtual Machine.

finalize

The Java Virtual Machine periodically performs this process, which automatically removes unreferenced objects from memory.

garbage collection

An object is a( n) __________.

instance of a class

This operator can be used to determine whether a reference variable references an object of a particular class.

instanceof

This array field holds the number of elements that the array has.

length

This is a method that stores a value in a field or in some other way changes the value of a field.

mutator

This key word causes an object to be created in memory.

new

This enum method returns the position of an enum constant in the declaration.

ordinal

A method in a subclass having the same name as a method in the superclass but a dif-ferent signature is an example of __________ .

overloading

Abstract methods must be __________ .

overridden

A method in a subclass that has the same signature as a method in the superclass is an example of __________ .

overriding

A subclass does not have access to these superclass members.

private

These superclass members are accessible to subclasses and classes in the same pack-age.

protected

When a class implements an interface, it must __________ .

provide all of the methods that are listed in the interface, with the exact signatures and return types specified

To delete an item from an ArrayList object, you use this method. a. b. delete c. erase d. get

remove

This search algorithm steps through an array, comparing each item with the search value.

sequential search

When a local variable has the same name as a field, the local variable's name does this to the field's name.

shadows

To determine the number of items stored in an ArrayList object, you use this method. a. b. capacity c. items d. length

size

In an array declaration, this indicates the number of elements that the array will have.

size declarator

When the value of an item is dependent on other data, and that item is not updated when the other data is changed, what has the value become?

stale

This type of method cannot access any non- static member variables in its own class.

static

In an inheritance relationship, this is the specialized class.

subclass

Each element of an array is accessed by a number known as a( n) __________.

subscript

This key word refers to an object's superclass.

super

The following is an explicit call to the superclass's default constructor.

super();

In an inheritance relationship, this is the general class.

superclass

Two or more methods in a class may have the same name, as long as this is different.

their parameter lists

A class's responsibilities are __________.

things the class knows. actions the class performs

This is the name of a reference variable that is always available to an instance method and refers to the object that is calling the method.

this

If you write this method for a class, Java will automatically call it any time you con-catenate an object of the class with a string.

toString

Enumerated data types are actually special types of classes.

true

You can declare an enumerated data type inside a method.

true

enum constants have a toString method.

true

Array bounds checking happens __________.

when the program runs

The first subscript in an array is always ___________.

0

The last subscript in an array is always __________.

1 less than the number of elements

CRC stands for

Class, Responsibilities, Collaborations

A class may not have more than one constructor.

False

A class may only implement one interface.

False

A method cannot return a reference to an object.

False

A static member method may refer to non- static member variables of the same class, but only after an instance of the class has been defined.

False

A subclass reference variable can reference an object of the superclass.

False

A superclass has a member with package access. A class that is outside the superclass's package but inherits from the superclass can access the member.

False

All static member variables are initialized to - 1 by default.

False

An array's sitze declarator can be a negative integer expression.

False

An object of a superclass can access members declared in a subclass.

False

If a subclass constructor does not explicitly call a superclass constructor, Java will not call any of the superclass's constructors.

False

The first size declarator in the declaration of a two- dimensional array represents the number of columns. The second size declarator represents the number of rows.

False

To find the classes needed for an object- oriented application, you identify all of the verbs in a description of the problem domain.

False

When a method is declared with the final modifier, it must be overridden in a subclass.

False

When you write a constructor for a class, it still has the default constructor that Java automatically provides.

False

A superclass reference variable can reference an object of a subclass that extends the superclass.

True

A two- dimensional array has multiple length fields.

True

An ArrayList automatically expands in size to accommodate the items stored in it.

True

Both of the following declarations are legal and equivalent: int[] numbers; int numbers[];

True

By default all members of an interface are public.

True

Constructors are not inherited.

True

Each instance of a class has its own set of instance fields.

True

In a subclass, a call to the superclass constructor can only be written in the subclass constructor.

True

Java does not allow a statement to use a subscript that is outside the range of valid subscripts for an array.

True

The Java compiler does not display an error message when it processes a statement that uses an invalid subscript.

True

The new operator creates an instance of a class.

True

The subscript of the last element in a single- dimensional array is one less than the total number of elements in the array.

True

The superclass constructor always executes before the subclass constructor.

True

The values in an initialization list are stored in the array in the order that they appear in the list.

True

When a class contains an abstract method, the class cannot be instantiated.

True

When an array is passed to a method, the method has access to the original array.

True

When an object is passed as an argument to a method, the method can access the argument.

True


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