Declaring and using constants and variable

Question 1

when the value of data item cannot be changed while running a program.

Answer 1

Constant

Question 2

___ can be refer as literal constant, numeric constant, unnamed constant or simply, hard-coded.

Answer 2

459

Question 3

a named memory location that can store a value. It can only hold one value but the value it hold can be changed.

Answer 3

Variable

Question 4

describes the type of data that can be stored, how much memory the item occupies and types of operation that can be perform on the data.

Answer 4

Data type

Question 5

– is a statement that reserves a named memory location

Answer 5

Variable declaration

Question 6

A ______ that identifies the type of data that the variable will store

Answer 6

data type

Question 7

An _____ that is the variable’s name

Answer 7

identifier

Question 8

begins with lowercase letter and capitalizing subsequent words within the identifier

Answer 8

Camel Casing

Question 8

An __________ , if you want a variable to contain an initial value

Answer 8

optional assignment operator (=) and assigned value

Question 9

contains unknown value (garbage value)

Answer 9

Uninitialized variable –

Question 10

– to declare 2 or more variables of the same type in a single statement, it is separated by a comma.

Answer 10

Multiple variable declaration

Question 11

the value of the location should not be changed during execution.

Answer 11

Named Constant

Question 12

All of integer data type are signed

Answer 12

(+ or -)

Question 13

Declaring integer data type:

Answer 13

• int (variable)
• byte (variable)
• short (variable)
• long (variable)

Question 14

BOOLEAN DATA TYPE

Answer 14

Only has 2 values (true or false)

Question 15

use to compare two items.
- also called “comparison operators”

Answer 15

Relational operator –

Question 16

Two floating-point data types

Answer 16

Two floating-point data types

Question 16

number contains decimal.

Answer 16

Floating-point –

Question 17

1. float
2. double

Answer 17

– data type that can hold values up to 6 or 7 significant accuracy
– data type that can hold values up to 14 or 15 significant accuracy

Question 18

data type to hold single character.

Answer 18

char

Question 19

– built-in class that provides the means for storing and manipulating character strings.

Answer 19

String

Question 20

special characters that begins with a backslash.

Answer 20

Escape Sequence

Question 21

is used for obtaining the input of the primitive data type.

Answer 21

Scanner –

Question 22

– retrieved value from an input device.

Answer 22

Token

Question 23

• Java supports two types of division

Answer 23

Floating-point division
Integer division

Question 24

Floating-point division
Integer divisiom

Answer 24

– occurs when either or both operands are
floating-point values. Example: 45.0 / 2 = 22.5
– occurs when both operand are integers.
Example: 45 / 2 = 22

Question 25

is the remainder operator
- it results the remainder of two integers.

Answer 25

Percent sign (%) or Modulo –

Question 26

is the process of converting one data type to another.

Answer 26

Type conversion –

Question 27

it automatically converts nonconforming operands to the unifying type. It is also called Promotions.

Answer 27

In implicit conversion

Question 28

is the type to which all operands in an expression are converted so that they are compatible to each other

Answer 28

Unifying type

Question 29

is the overriding the unifying type.

Answer 29

Explicit Conversion –

Question 30

forces the value of one data type to be used as a value of another data type

Answer 30

Type Casting

Question 31

– is created by placing the desired result type in parenthesis.

Answer 31

Cast Operator