Data Hierarchy and Troubleshoot

Data Hierarchy

Data refer to raw facts and figures, and consist of alphabet, numbers, sounds, pictures, images etc. A computer system processes data and gives information that is used for various purpose. The data is stored in the form of bits and bytes in a computer database.

Bit – A bit is short form of Binary digit. A computer system represents data using the digits 0 and 1. These digits show the computer circuits are ON are OFF. A bit is therefore represented by an electronic circuit that is either ON or OFF.

Byte- A byte is the collection of 8 bits. A byte of information is stored by using several bits in a predefined combination called Bit patterns. Two such bit patterns are ASCII and EBCDIC.

Bit -> Byte -> Field -> Record -> File -> Database

Field – A Field is a collection of bytes that contain data about an item. For Example, the name of student, his/her age, his/her class etc.

Record – A Record is a collection of interrelated fields. For example, a student’s record may contain fields such as name, age,  class, subjects etc.

Database – A database is a collection of all the files in an organization. For Example, files of students, teachers and other staff members of your school make the school database.

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Trouble Shoot

A Computer system normally runs well, and performs all required functions for you. But there are times when some parts of the computer do not work well.

Sometimes the display is not proper, at other times the speakers or mouse are not working. Problems exist in a computer system. These problems can be repaired by trained people and can be fixed by these.

Detecting the problems in a computer system when it is not working properly is called Troubleshooting.