Using boolean logic in Java

Question 1

what two values can a boolean expression have?

Answer 1

true or false.

Question 2

what is the difference between == and .equals

Answer 2

.equals is used to compare two strings it compares the values, == compares the memory address of two strings and not the actual values

Question 3

when does this comparison operator return? ==

Answer 3

this will return true if both sides are true

Question 4

what does this comparison operator return? !=

Answer 4

this will return true if expression is not equal.

Question 5

what does this comparison operator return? < or <=

Answer 5

the left side of the comparison must be true

Question 6

what does this comparison operator return? > or >=

Answer 6

the right side of the comparison must be true

Question 7

what does this logical operator mean? !

Answer 7

not

Question 8

what does this logical operator mean? &&

Answer 8

and

Question 9

what does this logical operator mean? ||

Answer 9

or

Question 10

what is short circuiting?

Answer 10

short-circuiting is the process of not having to evaluate the whole expression to know what the result is.

Question 11

how many statements does a simple conditional statement have?

Answer 11

one

Question 12

what conditions does a single branching conditional statement have to meet?

Answer 12

must use the else statement, will only run if false

Question 13

what conditions does a multiple branching conditional statement have to meet?

Answer 13

must use with an else if statement.

Question 14

what type of conditional statement is this

int number = 10;
if (number > 5) {
System.out.println(“Will run”);
}
if (number > 10) {
System.out.println(“will not run”)
}

Answer 14

simple conditional statement

Question 15

what type of conditional statement is this

boolean isHead = false;
if (isHead) {
System.out.println(“doing things”);
} else {
System.out.println(“not doing things”);
}

Answer 15

single branching conditional statement

Question 16

what type of conditional statement is this

String occassion = “Birthday”;
if (occassion.equals(“work”) {
System.out.println(“no”);
} elseif (occassion.equals(“Birthday”) {
System.out.println(“Happy Birthday”);
} else {
System.out.println(“no”);
}

Answer 16

multiple branching conditional statement