What is difference between data and information?

The difference between data and information is as follows.



   1. Data is unprocessed raw facts about a particular entity.   1.  Information is processed form of data.
  2. Data is used as input in the computer.   2.  Information is the output of computer.
  3. Data is normally huge in its volume.   3.  Information is normally short is its volume.
  4.  Data is the asset of organizations and is not available to people for sale.   4.  Information is normally available to people for sale.
  5.  Data is difficult or even impossible to reproduce. For examples. If Government lose the data of census, if will be almost impossible to reproduce it.   5.  Information is easier to reproduce if lost. For example, if the list of illiterate citizens is lost, it can be reproduced easily because the data is still stored.
  6.  Data is used rarely.   6.  Information is used frequently.
  7.  Data is an independent entity.   7.  Information depends on data.

 Define file, record and field in detail.


A combination of one or more characters is called field. It is the smallest unit of data that can be accessed by the user. The name of each field in a record is unique. The data type of a field indicates the type of data that can be stored in the field. Each field contains one specific piece of information. A field size defines the maximum number of characters that can be stored in a field.


Figure 1. 1: Fields and Record


A collection of related fields treated as a single unit is called a record. For example, an employee’s record includes a set of fields that contains Employer Number, Employee Name, Grade and Designation etc.


A collection of related records treated as a single unit is called file. Field is also known as data set. Files are stored in disk like hard disk, CD-ROM or DVD-ROM etc. a student file may contain the records of hundreds of students. Each student’s record consists of same fielde but each field contains different data.


Figure 1.2: A File