Describe the three levels of data abstraction, Operating System

There are three kinds of Data Abstraction:

  • Physical level: The minimum level of abstraction defines how data are saved.
  • Logical level: The next bigger level of abstraction, defines what data are saved in database and what relationship among those data.
  • View level: The biggest level of abstraction defines only part of whole database

 

1217_Data Abstraction.png

Posted Date: 7/30/2012 1:28:24 AM | Location : United States







Related Discussions:- Describe the three levels of data abstraction, Assignment Help, Ask Question on Describe the three levels of data abstraction, Get Answer, Expert's Help, Describe the three levels of data abstraction Discussions

Write discussion on Describe the three levels of data abstraction
Your posts are moderated
Related Questions
Device Drivers Communicates straight with peripheral devices (disks, tapes, etc.). Responsible for begin physical I/O operations on the device. Pro

What are the objectives of operating system? Objectives of OS 1.      Convenience: An OS makes a computer more suitable to use. 2.      Efficiency : An OS allows t

CONTROL PROGRAMS Control Programs are those programs which control & maintain the operation of computer. They provide basic facilities. Control program are further divided into


What is the essence of facility location in production operation management


Q. Explain the File-system manipulation? File-system manipulation there is several details in file allocation, creation, deletion and naming that users should not have to perfo

To evade race condition, the maximum number of processes that may be at the same time inside the critical section is The maximum number of processes which may be at the same t

A system consists of 10 units of resource class Ru. The resource needs of three user processes P1, P2 and P3 are like this                     Using Banker's algorithm, de