Unit 1 Quiz

Question 1

An array called myNums holds the following numbers. What is the value of element myNums[3]?

2

3

4

5

6

Answer 1

5

Question 2

What is the proper way to declare an array to hold movie titles?

Answer 2

String[] movieTitles;

Question 3

For a sequential search to work on an array, the array must be sorted? True of False

Answer 3

False

Question 4

What is the output of the below code when using the array declaration shown:

int[][] x = {{8, -2, 4}, {1, 0, 5} };

System.out.println(x[0][1]);

Answer 4

-2

Question 5

A For-Each loop is a handy way to iterate through an array.

True or False

Answer 5

True

Question 6

What is the output from the printline after the following code:

int[] myNums = {2, 3, 4, 5, 6};

for (int n : myNums)

System.out.println(n);

Answer 6

2

3

4

5

6

Question 7

For a binary search to work on an array, the array must be sorted.

True or False

Answer 7

True

Question 8

An Array element is accessed by its:

Answer 8

Index

Question 9

Which sorting method is more efficient?

Answer 9

API sort method

Question 10

What is the output of the below line of code for an Array of numbers called myNums. The array contains:

2

3

4

5

6

System.out.println(myNums.length);

Answer 10

5