Q. Under what conditions do page faults occur? Explain the actions taken by the operating system when a page fault occurs. Answer: A page fault take places when an access to a page that has not been brought into main memory takes place. The operating system authenticates the memory access aborting the program if it is invalid. If it is valid a free frame is located as well as I/O is requested to read the needed page into the free frame. Upon completion of I/O the process table as well as page table are updated and the instruction is restarted. Posted Date: 7/29/2013 12:41:50 AM | Location : United States

Ask an Expert

Related Discussions:- Action taken by the operating system when a page fault occur, Assignment Help, Ask Question on Action taken by the operating system when a page fault occur, Get Answer, Expert's Help, Action taken by the operating system when a page fault occur Discussions

Write discussion on Action taken by the operating system when a page fault occur
Your posts are moderated

Write your message here..

Related Questions

What is an acyclic graph, What is an acyclic graph? A tree that has bee... What is an acyclic graph? A tree that has been corrupted by links to other branches, but does not have any cyclic paths in it.

Explain the real time operating system, Explain the Real Time Operating Sys... Explain the Real Time Operating System A real-time operating system comprises definite, fixed time constraints. Processing should be done in the defined constraints, or the sys

What are placement and replacement algorithms, Placement algorithms :calcu... Placement algorithms :calculate where in available real-memory to execute a program. Common functions are next-fit, first-fit, and best-fit. Replacement algorithms :are

Explain kernel activity for ults, KERNEL ACTIVITY FOR ULTS: The kernel... KERNEL ACTIVITY FOR ULTS: The kernel isn't aware of thread activity but it is still managing process activity. When a thread compose a system call the whole process will be bl

Define the main reason to encrypt a file, Define the Main reason to encrypt... Define the Main reason to encrypt a file Major reason to encrypt a file is secure it for transmission.

Describe demand-paged environment, Q. Which of the subsequent programming ... Q. Which of the subsequent programming techniques and structures are good for a demand-paged environment? Which aren't good? Describe your answers. a. Stack b. Hashed symbol

Explain the os/2 operating system, Explain the OS/2 Operating System Li... Explain the OS/2 Operating System Like NetWare, OS/2 manage resources at three levels, as shown in Figure 4.5 Resources may be maintained at the session, process, and thread le

Evicting pages from physical memory, When do we write a page from physical ... When do we write a page from physical memory back to the disk? In general, caches have two broad types of writing policies. One approach is a write-through cache. In this case,

Demand-paging system, Consider a demand-paging system with the following ti... Consider a demand-paging system with the following time-measured utilizations: CPU utilization: 10%, Paging disk: 98%, Other I/O devices: 5%. What does this imply? How to improv

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