CC3 MIDTERMS

Question 1

-Mechanism that enables one class to inherit behavior and attributes of another class

-Apply knowledge of general category to move specific objects

Answer 1

Inheritance

Question 2

Consists of many types of diagrams

Answer 2

Unified Modeling Language (UML)

Question 3

overview of a class

Answer 3

Class diagram

Question 4

Used as a basis for inheritance

Answer 4

Base class also called Super class and Parent class

Question 5

Inherits from base class and Always “is a” case or example of more general base class

Answer 5

Derived class

Also called:

Subclass
Child class

Question 6

Achieve inheritance in Java

Answer 6

Keyword extends

Question 7

Always refers to superclass

Answer 7

Keyword super

Question 8

Concept of keeping data private

Says can be altered only by methods you choose and only in ways that you can control

Answer 8

Information hiding

Question 9

Instances hold single character value

Defines methods that can manipulate or inspect single character data

Answer 9

Character

Question 10

Class for working with fixed string data

Unchanging data composed of multiple characters

Answer 10

String

Question 11

Class for storing and manipulating channels says composed of multiple characters

Answer 11

String builder and String buffer

Question 12

Sequence of characters enclosed within double quotation marks

Unnamed object, or anonymous object of string class

Answer 12

Literal string

Question 13

Named object of string class

Answer 13

String variable

Question 14

Defined in Java. Lang. String

Automatically imported into every program

Answer 14

Class string

Question 15

Objects that cannot be changed

Answer 15

Immutable

Question 16

Evaluates contents of two string objects to determine if they are equivalent

Answer 16

Equals()

Question 17

Ignores case when determining if two strings equivalent

Answer 17

EqualsIgnoreCase

Question 18

Compares two strings and returns

Answer 18

CompareTo()

Question 19

Only if two strings refer to same value

Answer 19

Zero

Question 20

If calling object “less than” argument

Answer 20

Negative number

Question 21

If calling object “more than” argument

Answer 21

Positive number

Question 22

Convert any string to uppercase or lowercase equivalent

Answer 22

toUppercase and to toLowercase

Question 23

Returns length of string

Answer 23

Length()

Question 24

Determines whether specific characters occurs within string

Answer 24

indexOf

Question 25

Requires integer argument

Indicates position of character that method returns

Answer 25

charAt

Question 26

Return true or false if string objects does or does not end to start with specified argument

Takes string into argument

Answer 26

endsWith() method and starts with()

Question 27

Replace all occurrences of some character within string

Answer 27

Replace()

Question 28

Join simple variable to string

Answer 28

Concatenation

Question 29

Part of Java. Lang
Automatically imported into programs
Convert string into integer

Answer 29

Integer class

Question 30

Takes string argument
Returns it’s integer value

Answer 30

parseInt

Question 31

Class or object “wrapped around” simpler element

Answer 31

Wrapper

Question 32

More efficient

Answer 32

String builder

Question 33

Thread safe
Use in multi threaded programs

Answer 33

String buffer

Question 34

Memory block

Answer 34

Buffer

Question 35

Actual length of buffer

Answer 35

Capacity

Question 36

Change length of string in string builder object

Answer 36

setLength

Question 37

Adds characters to end of String builder object

Answer 37

Append()

Question 38

Takes string argument
Returns double value

Answer 38

Double. ParseDouble

Question 39

Named list of data items

Answer 39

Array

Question 40

Integer contained within square brackets

Indicates one of arrays variables or elements

Answer 40

Subscript

Question 41

Primitive variable

Answer 41

Scalar

Question 42

Instance variable
Automatically assigned value for every array created

Answer 42

Field

Question 43

Compare value to endpoints of numerical ranges

Find category in which value belongs

Answer 43

Range match

Question 44

Objects holds memory address where values stored

Answer 44

Reference types

Question 45

Process of arranging series of objects in some logical order

Answer 45

Sorting

Question 46

Begin with object that has lowest value

Answer 46

Ascending order

Question 47

Start with object that has largest value

Answer 47

Descending order

Question 48

Smallest items “bubble” to top of list
Eventually creating sorted list

Answer 48

Bubble sort

Question 49

Elements accessed using single subscript

Picture as column of values

Answer 49

One dimensional or single dimensional array

Question 50

Contains many useful methods for manipulating arrays

Answer 50

Arrays class

Question 51

Arrays have a fixed size that is sweet when they are created, while arraylists can grow our shrink dynamically

Answer 51

Size

Question 52

Arrays can only store of the same type, while ArrayLists can store elements of any type

Answer 52

Type

Question 53

Arraylists provide many useful methods for manipulating the lists, while arrays have limited methods available for manipulating the elements

Answer 53

Methods