# on Expressions

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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)

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.

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

4. 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 );
}
}
```
 a. cost per item: .5 b. cost per item: 0 c. cost per item: 1 d. cost per item: +6/12

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

6. What is the result of evaluating the following expression?

```-32 / 6
```
 a. -2 b. -5 c. -5.3333 d. +6

7. What is an expression?

 a. 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.

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

9. What is the value of

```-32 % 6
```
 a. 5 b. -5 c. 2 d. -2

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 ;

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