C Arrays Quiz

How is an array with 5 integers declared in C?

• int a(5);

• int a[5];

• int[5] a;

• array a[5];

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

• 0

• 1

• First

• Start

To access the third element of an array named 'arr', you would use:

• arr[2]

• arr[3]

• arr(2)

• arr(3)

What will be the size in bytes of an array int arr[20]; if an integer requires 4 bytes of memory?

• 40

• 80

• 20

• 5

Which of the following is a valid declaration for a 2D array?

• int a[][] = {{1,2}, {3,4}};

• int a[2,2] = {{1,2}, {3,4}};

• int a[2][2] = {{1,2}, {3,4}};

• array a[2][2] = {{1,2}, {3,4}};

Which of the following is the correct way to declare a 3D array?

• int a[][][] = {{{1},{2},{3}},{{4},{5},{6}}};

• int a[3][3][3];

• int[3][3][3] a;

• Both A and B

In an array declaration int arr[5] = {1, 2, 3};, what will be the value of arr[3]?

• 1

• 2

• 3

• 0

Which function is used to determine the length of an array?

• sizeof()

• length()

• len()

• size()

Which statement about arrays in C is false?

• Arrays can store multiple values of different data types.

• The size of an array must be specified at the time of declaration.

• The elements of an array are stored in contiguous memory locations.

• The array index starts from 0.

Which of the following correctly initializes an array of size 5 with all values set to 0?

• int arr[5] = {0};

• int arr[5];

• int arr[5] = {};

• int arr[] = {0,0,0,0,0};