Java Programming Itis 1213 Gaddis Test1

Front 1

How is a Java class defined?

Back 1

public class Name{

}

Front 2

How is the main method written?

Back 2

public static void main(String[] args){

}

Front 3

What is the extension for a java source code file?

Back 3

.java

Front 4

How do you execute a Java program?

Back 4

Bytecode in .class

java Simple // executes program

Front 5

What statement is used for output?

Back 5

System.out.println(" Your statement!"); or

System.out.print(" Your statement!");

Front 6

What is the difference between print and println methods?

Back 6

print will not use a carriage return on the statement.

Front 7

What special character is used to end a Java statement?

Back 7

;

Front 8

What is considered to be the standard output device in java?

Back 8

Console monitor

Front 9

What is considered to be the standard input device in java?

Back 9

keyboard

Front 10

What are the escape sequence characters?

Back 10

\n
\t
\b

Front 11

List the 8 java primitive types:

Back 11

byte
float
short
int
long
double
boolean
char

Front 12

How is a constant created in Java?

Back 12

final double CALC_SALES_TAX = 0.07;

Front 13

How is a string created in Java?

Back 13

String income;

Front 14

What are some useful methods from the String class?

Back 14

charAt(int index), length(), toUpperCase(), toLowerCase()

Front 15

What is the difference between a primitive variable and a reference variable?

Back 15

primitives actually store a value.
int number;

reference variable stores the address of where it was stored.

Front 16

What class is used for reading keyboard input?

Back 16

Scanner

Front 17

How do you create a Scanner object?

Back 17

Scanner keyboard = new Scanner(System.in);

Front 18

What import statement do you use to access the Scanner class?

Back 18

import java.util.Scanner;

Front 19

List the methods of the Scanner class?

Back 19

nextInt
nextDouble
nextLine
nextFloat
nextByte
nextLong
nextShort

Front 20

What is a class?

Back 20

is a collection of programming staements that specify the instance fields and methods an object can have

Front 21

What is the difference between a class and an instance class?

Back 21

Instance of the class means the object

Front 22

What is an accessor method?

What is a mutator method?

Back 22

Access retreives data (getter)

mutator stores data (setter)

Front 23

Is it a good idea to make fields private?

Back 23

yes, so no other classes can access it.

Front 24

What is the purpose of the "new" keyword?

Back 24

it creates an object

Front 25

What are the members of a class which will hold data when an object is created?

Back 25

instance fields

Front 26

Object-oriented programming (OOP) is centered on creating _______ rather than procedures.

Back 26

objects

Front 27

Data in an object are known as ______.

Back 27

fields

Front 28

Procedures in an object are know as ______.

Back 28

methods

Front 29

I object-oriented programming, we create the class and then from that class we create _______.

Back 29

objects

Front 30

A ______ can specify the fields and methods that a particular type of object may have.

Back 30

class

Front 31

A class is a "blueprint" that _______ may be created from.

Back 31

objects

Front 32

A class is not an object, but it can be a __________.

Back 32

description of an object

Front 33

An object created from a class is called an ______ of the class.

Back 33

instance

Front 34

An ________ is a Java keyword that indicates how a field or method can be accessed.

Back 34

access specifier

Front 35

When the _____ access specifier is applied to a class member, it can be accessed by code inside the or outside.

Back 35

public

Front 36

When the _____ access specifier is applied to a class member, the member cannot be accessed by code outside the class. The member can be accessed only by methods that are members of the same class.

Back 36

private

Front 37

_______ fields and instance methods require an object to be created in order to be used.

Back 37

Instance

Front 38

Instance methods are methods that are not declared with a special keyword, ____.

Back 38

static

Front 39

Classes can have special methods called ______.

Back 39

constructors

Front 40

Constructors are methods that are automatically called when an object is _______.

Back 40

created

Front 41

Constructors are used to perform operations at the time an object is ______.

Back 41

created

Front 42

Constructors have a few special properties that set them apart from normal methods:

Back 42

have the same name as the class.
have no return type (not even void).
may not return any values.
are typically public.

Front 43

When an object is created, its constructor is ______ called.

Back 43

always

Front 44

If you do not write a constructor, Java provides one when the class is compiled. The constructor that Java provides is known as the _____.

Back 44

default

Front 45

default constructor which does the following:

Back 45

sets all of the object’s numeric fields to 0.
sets all of the object’s boolean fields to false.
sets all of the object’s reference variables to the special value null.

Front 46

The _______ constructor is a constructor with no parameters, used to initialize an object in a default configuration.

Back 46

default

Front 47

A parameter variable is, in effect, a _______.

Back 47

local variable

Front 48

Within a method, variable names must be _____.

Back 48

unique