COP2253 Zybooks Chapter Three

Question 1

branch

Answer 1

a program path taken only if an expression’s value is true

Question 2

if-else structure

Answer 2

two branches, one taken if an expression is true, else the other branch is taken (else may be ommitted)

Question 3

if statement

Answer 3

executes a group of statements if an expression is true

Question 4

braces

Answer 4

{}

Question 5

brackets

Answer 5

[]

Question 6

equality operator

Answer 6

==

Question 7

nested if-else

Answer 7

the branch of one if-else statement contains another if-else statement

Question 8

Boolean

Answer 8

a type that has just two values, true or false

Question 9

relational operator

Answer 9

checks how one operand’s value relates to another (, <=, >=)

Question 10

logical operator

Answer 10

treats operands as being true or false, and evaluates to true or false (include AND, OR, NOT)

Question 11

logical AND

Answer 11

&&

Question 12

logical OR

Answer 12

||

Question 13

logical NOT

Answer 13

!

Question 14

switch statement

Answer 14

executes the first case whose constant expression matches the value of the switch expression, executes the case’s statements, and then jumps to the end: break statement (if there is no matching case, then default statements are executed)

Question 15

equals method (equalsIgnoreCase)

Answer 15

used to compare strings, returns true if strings are equal

Question 16

index (starting at 0)

Answer 16

the position number of each character in a string

Question 17

charAt(x)

Answer 17

determines the character at index x of a string

Question 18

.length()

Answer 18

returns the length of a string

Question 19

exception

Answer 19

a detected runtime error that commonly prints an error message and terminates the program

Question 20

strings are immutable meaning:

Answer 20

they cannot be changed

Question 21

conditional expression

Answer 21

has the form

condition ? exprWhenTrue : exprWhenFalse

Question 22

short circuit evaluation

Answer 22

skips evaluating later operands if the result of the logical operator can already be determined