Arrays C++

What is an array in C++?

• A collection of variables of different data types

• A collection of elements of the same data type stored in contiguous memory locations

• A collection of pointers

• A function that stores multiple values

What is the index of the first element in a C++ array?

• 1

• -1

• 0

• Depends on the array size

Which of the following is a valid way to declare an array in C++?

• int arr[];

• int arr[5];

• arr int[5];

• array[5] int;

How do you access the third element of an array `arr` in C++?

• arr[2]

• arr[3]

• arr(2)

• arr.get(2)

Which of the following statements is true about array size in C++?

• The size of an array can be changed after its declaration

• The size of an array is fixed once declared

• The size of an array is automatically doubled when full

• The size of an array can be dynamically changed at runtime

How do you initialize an array of size 5 with values 1, 2, 3, 4, and 5 in C++?

• int arr[5] = {1, 2, 3, 4, 5};

• int arr[5] = (1, 2, 3, 4, 5);

• int arr = {1, 2, 3, 4, 5};

• int arr[5] = [1, 2, 3, 4, 5];

What happens if you try to access an array element with an index outside its bounds?

• The program crashes

• The program will return a random value

• The program will return the last element in the array

• The behavior is undefined

Which of the following can be used to find the number of elements in a C++ array?

• length()

• sizeof(arr) / sizeof(arr[0])

• count(arr)

• size()

How do you initialize an array without specifying its size in C++?

• int arr[] = {1, 2, 3, 4};

• int arr[];

• int arr[0];

• int arr = {1, 2, 3, 4};

What is a two-dimensional array in C++?

• An array of arrays where elements are stored in a table with rows and columns

• An array that can store different data types

• An array with dynamic size

• An array that can change its size at runtime