Lesson 5 Quiz

1. Individual Arrays can hold
One type of variable
Two types of variables
Infinite types of variables
None of the above

2. T/F: To get to the fifth element in an array, you have to go through the first four.
True
False

3. T/F: In Java, Arrays can be expanded and contracted whenever you want.
True
False

4. The following code will make which array?

String[] tracks;
tracks = new String[4];
tracks[1] = "here";
tracks[3] = "there";

(null indicates that there is no element in that index)

5. In a array nums of ints with the following values: 2, 4, 1, 0, 6, 7, what does the following statements change the array to be?

nums[1] = nums[5] + 6;
nums[0]++;
nums[5] = nums[1] – 6;

6. What does the following loop change the array “grades” to be if grades starts out as
81, 67, 98, 93, 94, 83?

for (int k = 0; k < 6; k++)
{
    if (grades[k] < 90)
    {
       grades[k] += 5;
    }
    else
    {
       grades[k] += 2;
    }
}