B4 - Expressions and Arithmetic Operators

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

• alpha

• (alpha / momentum) - 12.4

• alpha ( / momentum - 12.4 )

• ((alpha / momentum) - 12.4)

What is an operand?

• Another name for number.

• Another name for integer.

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

• A value that is acted upon by an operator.

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+x

• 1.5 + 8.6

• a+b

• x / y

What does the following program output?

class question4

{

public static void main ( String[] args )

{

int totalCost = 6;

int items = 12;

System.out.println("cost per item: " + totalCost/items );

}

}

• cost per item: .5

• cost per item: 0

• cost per item: 1

• cost per item: +6/12

What is the result of evaluating the following expression?

( 1/2 + 3.5) * 2.0

• 8.0

• 8

• 7.0

• 0

What is the result of evaluating the following expression?

-32 / 6

• -2

• -5

• -5.3333

• +6

What is an expression?

• The same thing as a statement.

• An expression is a list of statements that make up a program

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

• An expression is a number expressed in digits.

Given the following expression:

(a - x)/(13 - z)

Which of the following is NOT a subexpression?

• (a - x)

• (13 - z)

• a - x

• x ) / (13

What is the value of

-32 % 6

• 5

• -5

• 2

• -2

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

• final pi = 3.14159265358979 ;

• final double pi = 3.14159265358979 ;

• constant double pi = 3.14159265358979 ;

• double pi = 3.14159265358979 ;