CC 102-Computer Programming I

1. Which of the following declares an array of integers?

• A. int array;

• B. int[] array;

• C. int array[];

• D. Both B and C

2. What is the index of the first element in an array?

• A. -1

• B. 0

• C. 1

• D. None of the above

How can you access the length of an array arr?

• A. arr.size

• B. arr.length

• C. arr.length()

• D. arr.getSize()

What will happen if you try to access an array index that is out of bounds?

• A. The program will run normally.

• B. An ArrayIndexOutOfBoundsException will be thrown.

• C. The program will skip that index.

• D. None of the above

What will this code print?

int[] arr = {10, 20, 30, 40, 50};

System.out.println(arr[2]);

• 10

• 20

• 30

• 40

Which of these is a valid for loop to iterate over an array arr?

• A. for (int i : arr)

• B. for (int i = 0; i < arr.length; i++)

• C. for (int i = 0; i <= arr.length; i++)

• D. Both A and B

Given int[] arr = {5, 10, 15};,

what does System.out.println(arr.length); output?

• 2

• 3

• 4

• 5

What will this code print?

int[] arr = {1, 2, 3};

for (int i = 0; i < arr.length; i++)

{ arr[i] *= 2; }

System.out.println(arr[1]);

• 2

• 4

• 6

• 8

What does the following code snippet output?

• 20

• 10

• 8

• 18

What is printed by the following code?

• 3

• 6

• 9

• 12