SWE111_quiz 2

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

• int arr[];

• array<int> arr;

• int arr[5];

• arr = new int[5];

Which of the following is the correct syntax to initialize an array?

• int arr[3] = {1, 2, 3};

• int arr = {1, 2, 3};

• int arr[] = [1, 2, 3];

• int arr[3] {1, 2, 3};

How do you access the last element of an array arr of size n?

• arr[n]

• arr[n-1]

• arr[-1]

• arr[last]

What happens when an array is passed to a function?

• A copy of the array is created

• The base address of the array is passed

• The function cannot modify the array

• It results in a syntax error

Given int arr[5] = {1, 2, 3, 4, 5};, what does cout << arr; print?

• The first element

• The address of the first element

• The entire array

• Compilation error

Can an array size be changed after declaration in C++?

• Yes

• No

• Only for global arrays

• Depends on compiler

What is the output of the following code fragment:
int ar[] = {2, 4, 6, 8 };

ar[0] = 23;

ar[3] = ar[1];

cout << ar[0]<< "and" <<ar[3] << endl;

• 23 and 2

• 2 and 8

• 3 and 1

• 23 and 4

Which of the following correctly initializes an array of 3 integers to 0?

• int arr[3] = {};

• int arr[3] = {0, 0, 0};

• int arr[3] = {0};

• All of the above

What will be the output of the following code?

• 1 2 3

• 6 7 8

• 1 7 3

• Compilation error

What will be the output of the following code?

• 20 30 40 50

• 10 20 30 40

• 40 30 20 10

• Compilation error