expressions

Question 1

expression

Answer 1

is combination of one or more operators and operands that usually performs calculation

Question 2

20/5
20.0/5
20/5.0
20.0/5.0

Answer 2

4

4. 0
5. 0
6. 0

Question 3

-/+

Answer 3

uniry or binary

Question 4

true or false

the assignment operator (=)has lower prcedence than any of arthmitic operators

Answer 4

true

Question 5

the evoluation of particular expression can be shown using an ……………….

Answer 5

expresion tree

Question 6

precdence page 106

Question 7

((19+8)%3)-4) ;

(19(+8%)3-4);

Answer 7

not valid

not valid

Question 8

how the compiler calculate this

count = count +1;

Answer 8

calculate this count +1

and then overwrite the old value

Question 9

increement(++) decrement–

Answer 9

without white space if there is white space then it is called string concatenation

Question 10

postfix and prefix

count ++.++count

Answer 10

in the first increase first

in the second increase after

Question 11

total+=5

mean

Answer 11

total=total +5;

Question 12

assignment conversion

Answer 12

when a value of one type is assigned to anthor variable during the value is converted to the new type

Question 13

casting is the most general form of conversion in java

dollars =(int )money ;

Question 14

the cast operator has a higher precedence than the division operator

Question 15

result =(float) total /count ;

the cast operators on the value of total not in the result of the division