C++ Arrays Quiz

What is an array in C++?

• A collection of variables of different types

• A collection of variables of the same type

• A variable that holds multiple types

• A dynamic data structure

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

• 0

• 1

• -1

• Depends on the compiler

How do you declare an array of 10 integers in C++?

• `int arr[10];`

• `array arr(10);`

• `int arr = new int[10];`

• `int[] arr = new int[10];`

Which of the following accesses the 5th element of an array `arr` in C++?

• `arr[5]`

• `arr[4]`

• `arr[6]`

• `arr[0]`

What will happen if you try to print an element outside the bounds of an array in C++?

هيحصل ايه لو حاولت انك تطبع عنصر بره الرينج بتاع الاراي

• It will return 0

• It will return garbage value

• It will throw an error

• The program will stop executing

What is the size of an array declared as `int arr[10];` in C++?

• 9

• 10

• Undefined

• Depends on the elements

Which of the following best describes a 2D array in C++?

• An array of arrays

• A dynamic structure

• A collection of different data types

• A single-dimensional array

How do you declare a 2D array of size 3x3 in C++?

• `int arr[3,3];`

• `int arr[3][3];`

• `int[] arr = new int[3][3];`

• `int arr[] = {3,3};`

Which of the following can be used to find the size of an array in C++?

• `sizeof(arr)`

• `arr.size()`

• `arr.length()`

• `arr.getSize()`

What is the output of the following code in C++?

int arr[4] = {10, 20, 30, 40};

cout << arr[1] + arr[3];

• 30

• 40

• 50

• 60