variables

Question 1

what happened when you declaration a variable

Answer 1

the compiler reserve portion of main memory space large enough to hold a particular type of value and indicate the name

Question 2

two pieces of information are used in the call to the println method

Answer 2

1-string

2-variable

Question 3

when you change the value of the variable

Answer 3

is called assignment that means that assignment statement overwrites the old data ‘

Question 4

constants

Answer 4

are to use English meaning of the words not variable their value doesn’t change

Question 5

when naming a constant to distingiush them from regular variable

Answer 5

using upper case and seperate by _

Question 6

PDA

Answer 6

personal digital assistenta

Question 7

what is the role of 8 bits

Answer 7

the first bit to the sign

Question 8

what happened if we put L at the end of the number

Answer 8

we mean that the type is long

Question 9

what happened if we put F at the end of the statement

Answer 9

it means that the number is float

Question 10

the difference between the number 607,”607is my data of birth day”

Answer 10

the first is number

the second is character

Question 11

what is ASCII stand for

Answer 11

American standard code for information interchange

Question 12

ASCII

Answer 12

upper case 
lower case 
. ; ,
digits 0-9
the space 
&
\ |

Question 13

if we put L in the end of the the number

Answer 13

that is mean that the number if LONG

Question 14

if we put F in the end of the the number

Answer 14

it means that the number is float

Question 15

ASCII

Answer 15

american standard code for inforamation interchange

Question 16

ASCII

Answer 16

upper case 
lower case 
. ; ,
the digts 0-9 
the space
&|\

Question 17

char c1 =”A” ; ​//”A”
char c2=”\u 00043”; //”A”
char c3=65; //”A”

Answer 17

A
A
A

Question 18

int code1=”A”;

int code2=56;

Answer 18

56

56

Question 19

how the character turn to binary

Answer 19

character to unicode to binary

Question 20

byte

Answer 20

-128 127

Question 21

short

Answer 21

-32,768 32,767

Question 22

int

Answer 22

-2,147,483,648 2,147,483,647