Chapter 4: Fundamental Data Types

Question 1

How many primitive types are in java?

Answer 1

8

Question 2

How many integer types are there?

Answer 2

4

Question 3

How many floating-point types in java?

Answer 3

2

Question 4

What is Integer.MAX_Value?

Answer 4

2.14 billion

Question 5

What is Integer.MIN_VALUE

Answer 5

-2.14 billion

Question 6

What is a number literal?

Answer 6

any number in a java program

Question 7

What happens when a numeric computation overflows?

Answer 7

the result falls outside the range for the number type

Question 8

T/F There is a warning when a numeric computation overflows?

Answer 8

False

Question 9

What is the simplest remedy for numeric computation overflows?

Answer 9

Use the long type

Question 10

T/F: It is legal to assign an integer type to a floating-point variable

Answer 10

true

Question 11

When does a rounding error occur?

Answer 11

when an exact representation of a floating-point number is not possible

Question 12

T/F: it is legal to assign a double value to an int value?

Answer 12

false - it is an assignment error

Question 13

What are numerical constants?

Answer 13

values that do not change and have special significance for a computation

Question 14

What happens when you tag a variable final?

Answer 14

You can never change after it has been set

Question 15

What do many programmers name constants?

Answer 15

All upper case, separating words with underscores

Question 16

How are constants declared?

Answer 16

public

Question 17

What is an expression

Answer 17

The combination of variables, literals, and/or method calls

Question 18

What does integers and floating-point values in an arithmetic expression yield?

Answer 18

a floating-point value

Question 19

What does the ++ operator do?

Answer 19

adds 1 to a variable

Question 20

What does the – operator do?

Answer 20

subtracts 1 from a variable

Question 21

If both arguments are integers, and the mathematical result is a floating-point number, what happens to the remainder?

Answer 21

It is discarded

Question 22

What does the modulus operator compute?

Answer 22

the remainder of an integer division

Question 23

What is the modulus operator?

Answer 23

%

Question 24

How do you take the square root of a number?

Answer 24

Math.sqrt(x)

Question 25

How do you take a number to the power?

Answer 25

Math.pow(x, y)

Question 26

How do you take the sin of a number?

Answer 26

Math.sin(x)

Question 27

How do you take the cosine of a number?

Answer 27

Math.cos(x)

Question 28

How do you take the tangent of a number?

Answer 28

Math.tan(x)

Question 29

How do you find the closest integer to x?

Answer 29

Math.round(x)

Question 30

How do you find the smallest integer greater than x

Answer 30

Math.ceil(x)

Question 31

How do you convert degrees to radians?

Answer 31

Math.toRadians(x)

Question 32

How do you take the absolute value of a number

Answer 32

Math.abs(x)

Question 33

How do you find the larger of two numbers

Answer 33

Math.max(x, y)

Question 34

How do you find the smaller of two numbers

Answer 34

Math.min(x, y)

Question 35

How do you find e to the power of x

Answer 35

Math.exp(x)

Question 36

How do you find the log of x, given that x is greater than 0?

Answer 36

Math.log(x)

Question 37

How do you find the decimal log of x?

Answer 37

Math.log10(x)

Question 38

How do you find the largest int that is less than x

Answer 38

Math.floor(x)

Question 39

How do you convert radians to degrees?

Answer 39

Math.toDegrees(x)

Question 40

How do you convert a value to a different type?

Answer 40

use a cast(typeName)

Question 41

What does text consist of?

Answer 41

characters

Question 42

What are characters?

Answer 42

letters, numbers, punctuations, spaces, and so on

Question 43

What is a string?

Answer 43

a sequence of characters

Question 44

What does a string literal do?

Answer 44

denote a particular string

Question 45

What does it mean to concatenate two strings?

Answer 45

to combine two strings into one large string

Question 46

What operator do you use to concatenate strings?

Answer 46

+

Question 47

Can you concatenate a int?

Answer 47

Yes - as long as one of the arguments of the + operator is a string

Question 48

How do you include a quotation mark in a literal string

Answer 48

A backslash (\) e.x.: "He said \"Hello\""

Question 49

What is this sequence called: \"

Answer 49

escape sequence

Question 50

How do you use a backslash in a string

Answer 50

Use this escape sequence: \\

Question 51

What does \n denote?

Answer 51

A newline character

Question 52

What are strings sequences of?

Answer 52

unicode characters

Question 53

What type are characters?

Answer 53

char

Question 54

How are characters formatted?

Answer 54

enclosed by singular quotation marks e.x. 'a'

Question 55

What method returns the char value of a string

Answer 55

charAt

Question 56

What position is the first character of a string at?

Answer 56

0

Question 57

What does the substring method do?

Answer 57

extracts a part of a string

Question 58

What is the syntax of the substring method?

Answer 58

str.substring(start, pastEnd)