Session 9

Which of the following correctly declares an integer array of size 5 in C?

• int arr(5);

• int arr[5];

• array<int> arr[5];

• int arr;

How do you access the third element of an array named numbers in C?

• numbers[3];

• numbers[2];

• numbers(2);

• numbers{3};

What is the index of the last element in an array declared as int arr[10];

• 9

• 10

• 0

• 1

Which of the following correctly initializes an integer array with values 1, 2, 3, 4, 5?

• int arr = {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 arr[10] in an array declared as int arr[5];?

• The program will always crash.

• The program will throw a syntax error.

• It causes undefined behavior.

• The value stored at arr[10] is always 0.

When passing an array to a function, how is it typically passed?

• By value

• By reference

• By copy

• It depends on the function

What does sizeof(arr) / sizeof(arr[0]) return when arr is declared as int arr[10];?

• 0

• 10

• 5

• 4

How do you correctly declare a 2D array with 3 rows and 4 columns?

• int arr(3,4);

• int arr[3][4];

• array<int,3,4> arr;

• int arr[4][3];

Which loop structure is most commonly used to iterate over all elements in a 1D array?

• while

• do-while

• for

• switch

Which of the following is true about arrays and pointers in C?

• The array name is a pointer to the first element.

• Arrays and pointers are completely unrelated.

• arr++ is valid for an array declared as int arr[5];

• Arrays in C are dynamically allocated by default.