Chapter 2

Question 1

What is x after the following statements?
int x = 1;
x *= x + 1;

Answer 1

x is 2.

Question 2

To assign a value 1 to variable x, you write

Answer 2

x = 1;

Question 3

What is the exact output of the following code?
double area = 3.5;
System.out.print(“area”);
System.out.print(area);

Answer 3

area3.5

Question 4

Suppose x is 1. What is x after x -= 1?

Answer 4

0

Question 5

The __________ method returns a raised to the power of b.

Answer 5

Math.pow(a, b)

Question 6

Suppose x is 1. What is x after x += 2?

Answer 6

3

Question 7

___________ is the Java assignment operator.

Answer 7

=

Question 8

Which of these data types requires the most amount of memory?

Answer 8

long

Question 9

Which of the following is incorrect?
int x = 9;
long x = 9;
float x = 1.0;
double x = 1.0;

Answer 9

float x = 1.0;

Question 10

What is x after the following statements?
int x = 2;
int y = 1;
x *= y + 1;

Answer 10

x is 4.

Question 11

If you attempt to add an int, a byte, a long, and a double, the result will be a __________ value.

Answer 11

double

Question 12

What is the value of (double)5/2?

Answer 12

2.5

Question 13

According to Java naming convention, which of the following names can be variables?
FindArea
findArea
totalLength
TOTAL_LENGTH
class

Answer 13

totalLength

Question 14

Which of the following is a constant, according to Java naming conventions?
MAX_VALUE

Test

read

ReadInt

COUNT

Answer 14

MAX_VALUE

COUNT

Question 15

-25 % 5 is _____

Answer 15

0

Question 16

Which of the following are correct ways to declare variables?Which of the following are correct ways to declare variables?

int length; int width;

int length, width;

int length; width;

int length, int width;

Answer 16

int length, width;

Question 17

Which of the following assignment statements is incorrect?

i = j = k = 1;
i = 1; j = 1; k = 1;
i = 1 = j = 1 = k = 1;
i == j == k == 1;

Answer 17

i == j == k == 1;

Question 18

What is the result of 45 / 4?

Answer 18

11

Question 19

To assign a double variable d to a float variable x, you write

Answer 19

x = (float)d;

Question 20

Every letter in a Java keyword is in lowercase?

Answer 20

true