Scjp 5 Study Guide Ch. 4

Front 1

___ operators always result in a boolean value (true or false)

Back 1

relational

Front 2

there are six relational operators: >, >=, <, <=, ==, and !=. The last two (== and !=) are sometimes referred to as ___ operators

Back 2

equality

Front 3

when comparing characters, Java uses the ___ value of the character as the numerical value

Back 3

Unicode

Front 4

equality operators

Back 4

there are two equality operators: == and !=
four types of things can be tested: numbers, characters, booleans, and reference variables

Front 5

when comparing reference variables, == returns true only if ___

Back 5

both references refer to the same object

Front 6

___ is for reference variables only, and checks for whether the object is of a particular type

Back 6

instanceof

Front 7

the ___ operator can be used only to test objects (or null) against class types that are in the same class hierarchy

Back 7

instanceof

Front 8

for interfaces, an object passes the instanceof test if any of its superclasses implement the interface on the ___ side of the instanceof operator

Back 8

right

Front 9

there are four primary math operators: ___ ___ ___ ___

Back 9

add, subtract, multiply, and divide

Front 10

the ___, returns the remainder of a division

Back 10

remainder operator (%)

Front 11

expressions are evaluated from ___, unless you add parentheses, or unless some operators in the expression have higher precendence than others

Back 11

left to right

Front 12

the *, /, % operators have ___ precendence than + and -

Back 12

higher

Front 13

if either operand is a ___, the + operator concatenates the operands

Back 13

String

Front 14

if both operands are ___, the + operator adds the operands

Back 14

numeric

Front 15

prefix operators (++ and --) run before/after the value is used in the expression

Back 15

before

Front 16

postfix operators (++ and --) run before/after the value is used in the expression

Back 16

after

Front 17

in any expression, both operands are ___ ___ before the operator is applied

Back 17

fully evaluated

Front 18

variables marked ___ cannot be incremented or decremented

Back 18

final

Front 19

returns one of two values based on whether a boolean expression is true

Back 19

ternary

Front 20

returns the value after the ? if the expression is true

Back 20

ternary

Front 21

returns the value after the : if the expression is false

Back 21

ternary

Front 22

the exam covers six "logical" operators

Back 22

&, |, ^, !, &&, and ||

Front 23

logical operators work with two expressions (except for !) that must resolve to ___ values

Back 23

boolean

Front 24

the && and & operators return true only if ___

Back 24

both operands are true

Front 25

the || and | operators return true if ___

Back 25

either or both operands are true

Front 26

the ___ and ___ operators are known as short-circuit operators

Back 26

&& and ||

Front 27

the && operator does not evaluate the right operand if the left operand is ___

Back 27

false

Front 28

the || operator does not evaluate the right operand if the left operand is ___

Back 28

true

Front 29

the & and | operators ___

Back 29

always evaluate both operands

Front 30

the ^ operator (called the "logical XOR"), returns true if ___

Back 30

exactly one operand is true

Front 31

the ! operator (called the "inversion" operator), returns ___

Back 31

the opposite value of the boolean operand it precedes