Explain enhanced second-chance algorithm, Operating System

Assignment Help:

Enhanced second-chance algorithm.

When we increase the second-chance algorithm by considering both the reference bit and the modify bit as an order pair. We have the following four possible classes.

a) (0,0) neither recently used nor modified - best page to replace.

b) (0,1) not recently used but modified - not quite as good.

c) (1,0) recently used but clean - it probably will be used again soon.

 


Related Discussions:- Explain enhanced second-chance algorithm

Cache replacement policies, The physical memory acts as a cache backed by t...

The physical memory acts as a cache backed by the disk. When the physical memory is full, and we want to read in another page from disk, we have to evict a page from physical memor

Compute the effective instruction time on the system, Q. An operating syst...

Q. An operating system sustains a paged virtual memory using a central processor with a cycle time of 1 microsecond. It costs an additional one microsecond to access a page other

Single-level page tables, As mentioned above, page tables, are lookup table...

As mentioned above, page tables, are lookup tables mapping a process' virtual pages to physical pages in RAM. How would one implement these page tables? The most straightforward

Determine the minimum number of units of resource, An operating system invo...

An operating system involves 3 user processes each one requiring 2 units of resource R .The minimum number of units of R like no deadlocks will ever take place is The minimum

What are the different accessing methods of a file, What are the different ...

What are the different accessing methods of a file? The different types of accessing a file are: Sequential access: Information in the file is accessed sequentially

Major advantages of microkernel approach to system design, Q. What are the ...

Q. What are the major advantages of the microkernel approach to system design? Answer: Benefits usually include the following (a) Adding a new service doesn't require modify

Define properties of time sharing operating system, Define properties of Ti...

Define properties of Time sharing operating system Time sharing:- T his systems uses CPU scheduling and multiprogramming to provide economical interactive use of a system. The

Explain the main functions of an operating system, Question: a) What sp...

Question: a) What special measures must be taken to ensure the reliability, availability, and security of electronic commerce and digital business process? b) What are the c

What are conditions under which a deadlock situation arise, What are condit...

What are conditions under which a deadlock situation may arise? A deadlock situation can arise if the following four conditions hold simultaneously in a system: a. Mutual ex

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