Algorimt/program-2

What is an array in C++?

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

• A single variable that holds multiple values of different types
  

• A function that performs calculations

• A keyword for declaring variables

How do you declare an integer array of size 5 in C++?

• int array[5];

• array<int> arr(5);

• int array = {5};

• int array[];

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

• 0

• -1

• 1

• Depends on the array size

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

• It will return 0 by default

• The program will crash

• Undefined behavior
  

• Compiler error

Which of the following is NOT a valid array declaration?

• int arr[5];

• double data[] = new double[5];

• float numbers[10];

• char str[20];

Which statement correctly initializes an array?

• int arr[3] = {1, 2, 3};

• int arr = {1, 2, 3};

• arr[3] = {1, 2, 3};

• int arr[3]; arr = {1, 2, 3};

   

What will be the output of the following code? int arr[] = {10, 20, 30, 40}; cout << arr[2];

• 30

• 20

• 10

• 40

How can you find the size of an array in C++?

• length(arr)

• sizeof(arr) / sizeof(arr[0])

• size(arr)

• arr.length()

Which loop is commonly used to traverse an array?

• for loop
  

• if statement

• switch statement

• do-while loop

   

What does the following code output? int arr[3] = {1, 2}; cout << arr[2];

• 1

• 0

• 2

• Undefined behavior