Free Exam: Prog 1 - Chapter 4
Number of Questions in Test: 13
Number of Questions in Preview: 5
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The Random class was introduced in this chapter. It generates a random number of value 0 to n-1, where [b]n[/b] is passed into the generator to simulate random events like a roll of dice. What is the range of values generated by the following code?
[size=3]generator.nextInt(20);[/size]
[size=3]generator.nextInt(20);[/size]
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 2
The Math class contains library methods to calculate certain math values (absolute value, max or 2 numbers, min of 2 numbers, exponent (given the base and exponent), and square root. To [b]use[/b] them, we need to instantiate the Math class.
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | No |
Question 3
A Boolean expression is one that can be evaluated as being true or false. To properly use the if and while structures, you have to construct a Boolean expression that the computer can evaluate to determine program flow. Which of the below examples correctly demonstrates a Boolean expression that results in the program going into the if structure ?
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 4
When evaluating an expression, Java performs operations of higher _______first, unless overridden by ______________.
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 5
Loops are Java's way of executing a block of code multiple times. The two types of loops we learned are called:
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |