Functions

  Functions of data stored in computer

Bit: Bit means binary digit.  A bit represents the smallest unit of data that a computer can handle. 

Bit can either 0 or 1.

Byte: A group of 8 bits called a byte that represents a single character, which can be a letter, a number or another symbol. bits in a byte are represents from 0 to 7 .

8 bits can represents 256 different binary combination (8 power of 2 =256).

   -128 to +127

Field:  A field is made up of bytes. A Combination of one or more characters is called field. It is the smallest unit of data that can be accessed by the user. eg. - RollNo, StudentName, Address etc.

Record:   A collection of related fields and each field containing only one value. record is a group of interrelated fields, as a student's name, the course, addresses etc.

File: The Collection of related records that a file. File is also known as a data set. A student file may contain the records of hundreds student.

                            Ascending order of data organized into:  
                              Bit- byte- fields-records- files