Question

Explain the concept of virtual memory and its importance in modern operating systems. Describe the working of demand paging and how page faults are handled. Provide an example to demonstrate the process.

10 Feb 2025
Answer :
Word Count : 589

Virtual memory is a fundamental concept in modern operating systems that allows a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to disk storage. This enables the system to run larger applications and multitask more efficiently than it could with physical memory alone. It creates an "idealized" memory space, where each process appears to have its own contiguous block of memory, even though the physical memory is limited and fragmented. Virtual memory is made possible by a combination of hardware and software, utilizing the memory management unit (MMU) in the ________ ______ _______ ____ _________ ___ ________ ____ ______ __________ ______ _________.
_____ _______ ______ _______ __________ ______ __________.
_____ _______ _______ _________ ____ ______ __________ __________.
_____ ____ __________ ______ ___ _______.
_______ ___ ________ _______ _____ _____ __________ ____.
__________ _____ _____ _______ _________ ______ _________ __________ ___ _______ _________ ____.
_________ ____ ______ _______ __________.
__________ _______ _____ ____ ____ _________ _____ _______ ___ _________ ___.
_______ _________ _____ ___ ________ _________ _______.
_____ ____ _____ ________ ____ ___ ______ ______ _________ _______ ________ __________.
_____ ____ _________ ____ ____ __________.
________ _____ _______ ________ _______ ______ _____ ____ _____ ___ _____.
____ ___ ___ __________ ______ _______ _________.
____ ________ ____ ____ ___ ____.
____ ____ _______ _____ ___ ________ _____ ___ ____ _____ ___ _____.
___ __________ ____ ____ ______ __________ ___ _____ _________ __________ ________ _______.
_____ _________ ________ _________ _________ _______ ___.
_________ _____ ______ ____ ___ _________ _______ ________ ____ ____ ___ _____.
____ _______ _________ _______ _________ _______ ___.
_____ _______ __________ ______ _________ _________ _____ _______ __________ _____.
____ ______ _______ _________ ___.
___ ________ _________ _________ ____ _______ ________.
_________ ____ _________ _____ ____.
__________ ____ _______ ________ _______.
_______ ____ __________ _________ _________ ____ ___ ______ __________.
______ __________ _____ ___ _________ ________ ________ ________ ____.
_________ ______ ____ _____ __________ ______ ________ ______ _______ ________ _________.
____ _______ _____ ___ ______ __________ ______ _____ ________.
________ __________ _________ _______ __________ ____ ________.
_____ ____ _________ ___ ________ ___ _______ ______.
__________ ______ ____ ___ _______ _____ ___.
___ ________ _____ _________ ______ _______ _______ _______ ____ ___.
______ _____ ___ _____ ____ ___.
__________ _____ _______ ______ _____ ______ __________ ______ _________ ____.
_______ _____ _______ _____ ______ _______ ___.
____ ________ _________ __________ __________ _____ ____ __________ _________ ______.
_____ _______ ____ ________ _____ ______.
______ ___ ____ ___ ____ ______ ________ _______.
____ _____ ____ __________ __________ ____ ____ __________.
________ _________ _____ ______ __________ _______ _________ _____ _____ __________ _________ _____.
_________ __________ __________ ___ ___ _________ ______ _____ ________ ____ ________ ______.
____ ______ _________ ____ _______ ________ ________ _____ _________.
_______ ______ _______ _________ _____ __________ ____ _____.
__________ ________ _____ ____ _____ ___.
________ _____ ____ ____ ______ ______ __________.
______ ___ _______ ______ _____ ________ ________ ________ ___.
____ __________ _________ ___ __________ _______ ____ ________ ___ __________ ________.
______ __________ ____ __________ ___ ______ _______ _______.
_______ ___ __________ __________ ______ ______ ____ ________ ____ ___ ___ _______.
___ ____ _______ __________ _____ ________ ________.
___ __________ ________ ___ _________ ____ _____ ____ _____ ____ _________ ____.
_________ _____ ___ ___ ____ _______ ______ ____ _________ ______ ____ _____.
______ __________ ______ ____ __________ ____ ___ _________ __________ _______ _______.
_______ ____ ______ __________ _________ _______ ______ _____ ___ __________ __________ ______.
_______ _____ ___ ________ _______ ________ __________ ____ ____ _________ ___.
____ _________ _____ ___ ___.
_________ ______.
Get Full Answer on WhatsApp

Related Questions

 

Discuss the different techniques for I/O management in an operating system. Explain how buffering, spooling, and caching improve I/O performance. Give examples to illustrate their practical applications.

 

Describe the architecture of a mobile operating system such as Android or iOS. Discuss the key features, differences from desktop operating systems, and challenges associated with mobile OS development.

Describe the structure of a disk in an operating system and explain the concept of disk scheduling. Compare the FCFS, SSTF, and SCAN scheduling algorithms. Provide an example to demonstrate the working of these algorithms.

Explain the concept of virtual memory and its importance in modern operating systems. Describe the working of demand paging and how page faults are handled. Provide an example to demonstrate the process.

Consider the following page-reference string: 1, 3, 4, 2, 7, 8, 6, 2, 3,9, 6, 4, 2, 1, 3, 5, 9, 10, 4, 1, 5, 3, 4

 

How many page faults would occur for following replacement algorithms assuming four frames? Remember that all frames are initially empty, so your first unique pages will all cost one fault each.

 

i. FIFO replacement.

 

ii. LRU replacement.

 

iii. Optimal replacement.

Consider the following jobs.
 

Job# Arrival time Run time
A 0 4
B 2 5
C 3 6
D 5 5

 

a) Using the SRTF method, compute the completion times of the above jobs, average turn around time and average waiting time.

 

b) Using the SJF (Shortest Job First) method, compute the completion times of the above jobs, the average turn around time and the average waiting time.

 

c) Using the Round Robin method (with Quantum2), compute the completion times of the above jobs and the average waiting time.

Compare and contrast contiguous and non-contiguous memory allocation methods. Explain the First-Fit, Best-Fit, and Worst-Fit algorithms for memory allocation with examples. Which method is more efficient and why?

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers
Login Cart
IGNOU NEWS
Assignment Submission Last Date Extended Till 30 June 2026 Click Here★★★IGNOU June 2026 TEE Date Sheet Released Click Here★★★
Top
📞
Call Support Instant phone assistance Explain the concept of virtual memory and its importance in modern ope
→
🟢
WhatsApp Chat Fast live messaging
→
Email Us Business enquiries & support
→