Arrays in C

What is an array in C programming?

• A method for sorting data

• A type of function

• A collection of different data types

• A sequential collection of similar data items

How is a single-dimensional array declared in C?

• size array_name[datatype];

• datatype array_name[size];

• array_name[size] datatype;

• datatype[size] array_name;

What is the index range for an array of size n?

• 0 to n

• 1 to n-1

• 0 to n-1

• 1 to n

Which of the following is a method to store values in an array?

• Initialization

• Declaration

• Function calling

• Memory allocation

What does the scanf() function do in C?

• Declares variables

• Prints output to the screen

• Allocates memory for arrays

• Reads input from the keyboard

What is the purpose of the NULL character in strings?

• To allocate memory

• To store the length of the string

• To initialize the string

• To indicate the end of the string

How do you initialize a string in C?

• char str[] = 'Hello';

• char str[5] = 'Hello';

• char str[5] = "Hello";

• char str[] = "Hello";

What is the output of printf("%d", a[0]); if a is an array of integers?

• The first element of the array

• The size of the array

• The address of the array

• The last element of the array

What is the main advantage of binary search over linear search?

• It requires less memory

• It is easier to implement

• It is faster on sorted arrays

• It works on unsorted arrays

Which of the following is a characteristic of a two-dimensional array?

• It can only be declared with a fixed size

• It is organized in rows and columns

• It is a linear list of data

• It can only store integers