Chapter 10 JAVA

Question 1

Which one of the following is NOT a correct arithmetic expression?

A. alpha

B. (alpha / momentum) - 12.4

C. alpha ( / momentum - 12.4 )

D. ((alpha / momentum) - 12.4)

Answer 1

C. alpha ( / momentum - 12.4 )

Question 2

What is an operand?

A. Another name for number

B. Another name for integer

C. One of the arithmetic symbols like *, +, -, and /

D. A value that is acted upon by an operator

Answer 2

D. A value that is acted upon by an operator

Question 3

Assume the following declarations:

short a=12 ;
int b=33 ;

float x = 2.3;
double y = 3.14;
Which one of the following expressions will NOT be evaluated using double precision floating point?

A. a + x

B. 1.5 + 8.6

C. a + b

D. x / y

Answer 3

C. a + b

Question 4

What does the following program output?

public class question4
{
  public static void main ( String[] args )
  {
    int totalCost = 6;    
    int items     = 12;
    System.out.println("cost per item: " + totalCost/items );
  }
}
 A.    cost per item: .5

B. cost per item: 0

C. cost per item: 1

D. cost per item: +6/12

Answer 4

B. cost per item: 0

Question 5

What is the result of evaluating the following expression?

( 1/2 + 3.5) * 2.0
A. 8.0

B. 8

C. 7.0

D. 0

Answer 5

C. 7.0

Question 6

What is the result of evaluating the following expression?

-32 / 6
A. -2

B. -5

C. -5.3333

D. +6

Answer 6

B. -5

Question 7

What is an expression?

A. An expression is the same thing as a statement.

B. An expression is a list of statements that make up a program.

C. An expression is a combination of literals, operators, variables, and parentheses used to calculate a value.

D. An expression is a number expressed in digits.

Answer 7

C. An expression is a combination of literals, operators, variables, and parentheses used to calculate a value.

Question 8

Given the following expression:

(a - x)/(13 - z)
Which of the following is NOT a subexpression?

A. (a - x)

B. (13 - z)

C. a - x

D. x ) / (13

Answer 8

D. x ) / (13

Question 9

What is the value of -32 % 6

A. 5

B. -5

C. 2

D. -2

Answer 9

D. -2

Question 10

Which of the following declarations works for the constant pi (assume that the numerical value is correct)?

A. final pi = 3.14159265358979 ;

B. final double pi = 3.14159265358979 ;

C. constant double pi = 3.14159265358979 ;

D. double pi = 3.14159265358979

Answer 10

B. final double pi = 3.14159265358979 ;