Explain fifo page replacement, Operating System

Assignment Help:

FIFO page replacement

This is the easiest page replacement algorithm. At this juncture the 1st page entering is the 1st to leave that is the oldest page leaves. To execute this we use a queue and the page at the head of the queue is the one being removed. The new page is put in at the tail of the queue. The disadvantage is that its performance isn't always good. 

Example, Consider a three frame memory and if the sequence in which pages come into the memory is 1,2,3,4,1 then 1,2,3 are entered into the memory in order. While the page 4 is required then 1 is removed as well as the new page 4 is inserted at the tail end with the head being 2. Now if 1 comes then 2 is detached as it is the new head.

 


Related Discussions:- Explain fifo page replacement

What are batch systems?, What are batch systems? Early computers were p...

What are batch systems? Early computers were physically huge machines run from a console. The general input devices were card readers and tape drivers. The common output device

Explain process state with diagram, Question 1 Explain single Partition Al...

Question 1 Explain single Partition Allocation and Multiple Partition Question 2 What is PCB? What useful information is available in PCB? Question 3 Explain Preemptive and No

What are the objectives of operating system?, What are the objectives of op...

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

List the various file attributes, List the various file attributes. A f...

List the various file attributes. A file has particular other attributes, which vary from one operating system to another, but typically having of these:  Name, identifier, typ

Advantages and disadvantages of thread, OPERATING SYSTEM 1. Describe th...

OPERATING SYSTEM 1. Describe the term operating system. Write down the functions of operating system. 2. Explain Thread? Write down the advantages and disadvantages of threa

Batch oriented and interactive operating system., properies of Batch orient...

properies of Batch oriented and interactive operating system.

Explain the performance of demand paging, Performance of demand paging ...

Performance of demand paging Demand paging can have an important effect on the performance of a computer system. As long as there are no page faults, the effective access time

What are the different file operations?, What are the different file operat...

What are the different file operations? Create : - Space for the file in the file system update directory table. Write : - file name and data to be written is

How does dma raise system concurrency, Q. How does DMA raise system concurr...

Q. How does DMA raise system concurrency? How does it make difficult hardware design? Answer: DMA increases system concurrency by allowing the CPU to perform tasks while the

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