Quiz 10
Name: Panther ID:
Please use 10 minutes to finish this quiz.
1. [2 pts] Which of the following are valid declarations?
a. int []primes = {2, 3, 4, 5, 7};
b. int[] scores = new int[5];
c. int[] primes = /* new */ {2, 3, 4, 5, 7};
d. float elapsedTimes[] = {11.47, 12.04, 11.72};
e. char[] grades = {‘a’, ‘b’, ‘c’, ‘d’, ‘f’};
a, b, c, and e
2. [4 pts] Please use new and initializer list to create the following array: “COP”,
“2250”, “Section 5” respectively.
String [] names = new String[3];
names[0] = “COP”;
names[1] = “2250”;
names[2] = “Section 5”;
or
String [] names = {“COP”, “2250”, “Section 5”};
// you could replace any String literal with new String constructor
3. [4 pts] Write a method called averageArray that accepts an array of double values
and returns the average of the values stored in the array.
public static double averageDouble(double [] nums)
{
if (nums.length == 0) return 0;
double result = 0;
for(int i = 0; i < nums.length; i++)
result += nums[i];
return result/nums.length;
}
