Chapter 3

Question 1

method

Answer 1

a program module that contains a series of statements that carry out a task

Question 2

Invoke/call a method

Answer 2

execute it

Question 3

client method

Answer 3

a method that calls another

Question 4

Abstraction

Answer 4

The programming feature that allows you to use a method name to encapsulate a series of statements

Question 5

Method header

Answer 5

The first line of the method and contains information about how other methods can interact with it

Question 6

Declaration

Answer 6

Another name for a method header

Question 7

method body

Answer 7

Set of statements between curly braces that follow the header and that carry out the method’s actions

Question 8

Implementation

Answer 8

describes the actions that execute within a method, method body

Question 9

Stub

Answer 9

A method that contains no statements, programmers create stubs as temporary placeholders during the program development process

Question 10

Access modifier (another term)

Answer 10

Access spesifier

Question 11

return type

Answer 11

Indicates the type of data that is send back to its calling method ofter completion of the method

Question 12

To return a call

Answer 12

is to send a call from a called method back to the calling method

Question 13

A fully qualified identifier

Answer 13

Includes a class name and a dot before the identifier

Question 14

Arguments

Answer 14

Are data items sent to methods in a method call

Question 15

Parameters

Answer 15

Data items received by a method

Question 16

Implementation hiding

Answer 16

Is a principle of object-oriented programming that describes the encapsulation of method details within a class

Question 17

Interface to a method

Answer 17

includes the methods return type, name, arguments. Is the part that the client sees and uses

Question 18

A black box

Answer 18

Device that you can use without understanding how it works

Question 19

Local variable

Answer 19

Known only within the boundaries of a method

Question 20

A methods signature

Answer 20

The combination of the method name and number, types and order of arguements

Question 21

Actual parameters

Answer 21

Arguments in a method call

Question 22

Formal parameters

Answer 22

The variables in a method declaration that accept the values from actual parameters

Question 23

Return statement

Answer 23

ends a method and frequently sends a value from a called method back to the calling method

Question 24

Method type

Answer 24

Its return type

Question 25

Unreachable statements

Answer 25

those that cannot be executed because the logical path can never encounter them; an unreachable statement causes a compiler error

Question 26

Dead code

Answer 26

Is a set of statements that are logically unreachable

Question 27

is-a-relationship

Answer 27

Is the relationship between an object and the class of which it is a member

Question 28

Instantiation of a class

Answer 28

Is an object; iow, it is one tangible example of a class

Question 29

A class client /class user

Answer 29

Is an application or class that instantiates objects of another prewritten class

Question 30

Data fields

Answer 30

Data variables declared in a class outside of any method

Question 31

Instance variables

Answer 31

Data components of a class

Question 32

Assigning private access to a field

Answer 32

No other classes can access the field’s values, and only methods of the same class are allowed to set, get, or otherwise use private variables

Question 33

Information hiding

Answer 33

The object-oriented programming principle used when creating private access for data fields; a class’s private data can be changed or manipulated only by a class’s own methods and not by methods that belong to other classes

Question 34

Mutator methods

Answer 34

Set values

Question 35

Accessor methods

Answer 35

retrieve values

Question 36

Non-static methods

Answer 36

those methods used with object instantiations are called instance methods

Question 37

Primary key

Answer 37

is a unique identifier for data within a database

Question 38

New operator

Answer 38

Allocates the memory needed to hold an object

Question 39

Reference to an object

Answer 39

The name for a memory address where the object is held

Question 40

Constructor

Answer 40

is a method that establishes an object

Question 41

Default constructer

Answer 41

Is one that requires no parameters; if you do not write one, a default constructor is created for a class automatically by Java compiler

Question 42

Abstract data type(ADT)

Answer 42

A type whose implementation is hidden and accessed through its public methods

Question 43

Programmer-defined data type

Answer 43

One that is created by a programmer and not built into the language