Unit 1: CS21 Review

Question 1

what are string literals

Answer 1

a sequence of characters enclosed in double quotes which is assigned to a variable

Question 2

data type

Answer 2

Determines what kind of data a variable can hold

Question 3

examples of primitive data types

Answer 3

int, double, boolean, and *char
*not mentioned on the AP test

Question 4

double is more bits than int

Answer 4

true

Question 5

athematic expressions

Answer 5

expressions with int or double formed by +,-,*,/, and %

Question 6

int + int

Answer 6

int

Question 7

int + double

Answer 7

double

Question 8

when doing mod does the big or small number go first?

Answer 8

big

Question 9

compound expressions

Answer 9

expressions with multiple arithmetic operators

Question 10

what is order precedence

Answer 10

PEMDAS

Question 11

what is the assignment operator

Answer 11

=

Question 12

what are the increment operators?

Answer 12

++,—

Question 13

what happens when a variable is declared as final?

Answer 13

the value can’t be changed once it’s initialized, any attempt results in an compilation error

Question 14

compound assignment operators

Answer 14

+=,-=,*=,=, %=

Question 15

casting

Answer 15

process of converting a variable from one data type to another

Question 16

rounding

Answer 16

modifies a double vale to the nearest integer value

Question 17

if you cast a double to an int what hapoens

Answer 17

anything after the decimal point in the double is cut off (without rounding)

Question 18

double rounded if positive

Answer 18

(int)(x+0.5)

Question 19

double rounded if negative

Answer 19

(int)(x-0.5)

Question 20

overflow

Answer 20

if a num surpasses the java max then it goes back the the same number. uh negative

Question 21

compiler

Answer 21

Software that translates to Java source into the job class while what can be run on the computer

Question 22

Compiler or syntax error

Answer 22

lAn those foundering the completion

Question 23

main method

Answer 23

where execution starts jv a java program

Question 24

compiler or syntax error

Answer 24

error during compile

Question 25

variable

Answer 25

name associated with a memory location in a computer

Question 26

declare a variable

Answer 26

spesficy the type and name

Question 27

data type

Answer 27

Determines the size of memory reserve for a variable

Question 28

camel case

Answer 28

One way to create a variable name by a pending several words together in uppercase the first letter of each word after the first (myScore)

Question 29

operator

Answer 29

Common mathematical symbols

Question 30

what happens if you attempt to divide an integer by zero?

Answer 30

The arithmetic exception error occurs

Question 31

the