SAD-File Structure

Some of the basic terms used to describe the file hierarchy are as follows Byte: A byte is an arbitrary set of eight bits that represent ...

Some of the basic terms used to describe the file hierarchy are as follows

Byte: A byte is an arbitrary set of eight bits that represent a character .It is the smallest addressable unit in today’s computers.

Data item (element): One or more bytes are combined into a data item to describe an attribute of an object. Sometimes referred as a field.

Record: The data items related to an object are combined into a record. There are two types of records
  •   Logical record maintains o logical relationship among all items in the record.
  •    Physical record is the way in which records are stored in a storage medium.
File: A collection of related records makes up a file. The  size of  a file is limited by the size of memory or the storage medium. There are two characteristics denoting the way files are organized
  •   Activity specifies the percentage of actual records processed in a single run.
  •   Volatility addresses the properties of record changes.
Data base: The highest level in the hierarchy is the database. It is a set of interrelated files for real time processing.
Name

ADO,131,ASP,3,C++,61,CORE JAVA,1,CSS,115,HTML,297,index,5,JAVASCRIPT,210,OS,47,PHP,65,SAD,53,SERVLETS,23,SOFTWARE ENGINEERING,245,SQL,71,TCP/IP,1,XHTML,9,XML,18,
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SAD-File Structure
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