Write a short note on file organization and access, Operating System

Assignment Help:

Write a short note on file organization and access.

There are three methods to access files

  • 1Record Access
  • 2Sequential Access
  • 3Random Access

The record access method is dependent on the physical medium on which the file is stored. Magnetic tape is sequential by it's extremely nature to read a record you must start at the beginning of the tape and sequentially read every record until you get to the one you want. With disks, obviously random access is possible. It is the same as the difference between audio compact disc and audio cassette. With audio tape you have to begin at the beginning and run the tape forward until you get to the song you want to hear. With compact disc you are able to play the songs in random order or go directly to the track you want to hear.

Though, not only ought to the medium permit for random access to records, however the file itself must support going directly to the record you want to retrieve. This feature of the file is called as file organization.

 


Related Discussions:- Write a short note on file organization and access

Fork system call in unix, Forking is an important phase of Unix, critical t...

Forking is an important phase of Unix, critical to the support of its design strategies, which encourages the implementation of filters. In Unix, a filter is a process that reads i

How free-space is managed using bit vector implementation, How free-space i...

How free-space is managed using bit vector implementation? The free-space list is implemented as a bit map or bit vector. Each block is shown by 1 bit. If the block is free, th

Explain about input - output system management, Q. Explain about Input - Ou...

Q. Explain about Input - Output System Management? I/O System Management The module which keeps track of the status of devices is known as I/O traffic controller. Every

Major advantage of the layered approach to system design, Q. What is the ma...

Q. What is the major advantage of the layered approach to system design? What are the de-merits of using the layered approach? Answer: As in all cases of modular design as well

Effects of multiprogramming on resource utilization, Effects of multiprogra...

Effects of multiprogramming on resource utilization With the utilize of multiprogramming, batch processing is able to be quite efficient .Just as multiprogramming permits the

What is a thread, What is a thread? A thread or else called a lightweig...

What is a thread? A thread or else called a lightweight process (LWP) is a basic unit of CPU utilization, it comprises of a thread id, a program counter, a register set and a s

Objectives and functions of an operating system, Question: a) What is ...

Question: a) What is an Input/Output module and what are the five categories their functions fall into? b) What is an Operating System? Briefly describe the two objectives

Explain external fragmentation?, Explain external fragmentation? Extern...

Explain external fragmentation? External fragmentation is the process where the free space and the space still available for use, in a piece of storage become separated into ma

Changing the runlevel of system from 5 to 3 on startup, Front page We n...

Front page We need to continue or customization and documentation of our system. Currently our system boots into runlevel 5 and we need it to boot into runlevel 3. For future r

Example of semaphore, For example, by initializing a semaphore to 0, thread...

For example, by initializing a semaphore to 0, threads can wait for an event to occur, and impose an ordering constraint, similar to a monitor using condition variables, but with m

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd