CS1010 Lab 4

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

• 0

• 1

• 9

• 10

How do you initialize an array of size 5 in C?

• int arr[5] = {1, 2, 3, 4, 5};

• int arr[] = [5];

• int arr = {1, 2, 3, 4, 5};

• int arr[5] = (1, 2, 3, 4, 5);

Given an array arr[] = {10, 20, 30, 40}, what is the value of arr[1]?

• 10

• 20

• 30

• 40

Which of the following statements about arrays in C is true?

• The size of an array can be changed after it is declared.

• Array elements are stored in contiguous memory locations.

• An array can hold multiple data types.

• The array index starts from 1.

What will happen if you try to access an element out of the bounds of an array?

• Compilation error

• Runtime error

• The program will terminate with an error

• Undefined behavior

Given an array int arr[3] = {10, 20, 30};, what will arr[3] access?

• 30

• Compilation Error

• 0

• Undefined Behavior

What is the value stored in ptr?

• The value of x

• The memory address of x

• 10

• Compilation error

If int *p is a pointer, which of the following expressions assigns the value 20 to the memory location pointed to by p?

• p = 20;

• *p = 20;

• *p = &20;

• p = &20;

What does p[2] evaluate to?

• 1

• 2

• 3

• 4

What will be printed if we output x?

• 10

• 20

• address of x

• Compilation error