What is swapping?
explain the terms "swap in" and "swap out" with a neat diagram. Explain under which circumstances page faults occur and how they are resolved by the operating system.
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Answer the following questions a) If average page-fault service time is 9 milliseconds, a memory access...
Answer the following questions a) If average page-fault service time is 9 milliseconds, a memory access time is 202 nanoseconds, and the page fault rate is 0.2% then what is the effective access time (in nanoseconds) for a demand paging scheme. b) Under what circumstances do page faults occur? Describe the actions taken by the operating system when a page fault occurs.
Of the following, which is/are true about the process of swapping a page out of DRAM...
Of the following, which is/are true about the process of swapping a page out of DRAM and into disk:You can select more than one The Operating System chooses which page to move from DRAM to disk The program whose page is getting swap from DRAM to disk was the program that triggered the fault. The valid bit of the page that is moved from DRAM to disk is set to 1 The operation of swapping page will be faster if...
Show how many page faults are will occur if a process access the following page sequence...
Show how many page faults are will occur if a process access the
following page sequence (reference string). Assume OS is using a
fixed number of 4 pages allocated for the process and is using
First-In-First-Out (FIFO) algorithm.
Count the faults acquired in the page table initialization.
Show your work by completing the following table:
Show how many page faults are will occur if a process access the following page sequence (reference string). Assume OS is using a fixed number...
1. Given a reference string generated by a process, how many page faults occur with N...
1. Given a reference string generated by a process, how many page faults occur with N frames if page replacement is by LRU, or FIFO, or the optimal algorithm? please explain
<Operating System> 1. A process accesses pages in the following order (Assume all frames are initially...
<Operating System> 1. A process accesses pages in the following order (Assume all frames are initially empty): 1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6 Determine the number of page faults that will occur for the following algorithms: (Show your work!) Least Recently Used replacement algorithm with 5 frames available to the process. What is the minimum number of page faults that can occur for this process, regardless...
In a real world system, under what circumstances can a pure oscillatory response occur? Explain why,...
In a real world system, under what circumstances can a pure oscillatory response occur? Explain why, in general, a natural system won’t have pure continuous oscillatory responses.
Answer the following questions based on the Memory Management tasks of an Operating System. 5 Consider...
Answer the following questions based on the Memory Management tasks of an Operating System. 5 Consider the following sequence of page references: 5, 6, 7, 6, 8, 7, 9, 5, 9, 6, 8, 9 Assuming that all frames are initially empty, indicate the contents of memory after each reference, and how many page faults are found for each of the following page replacement algorithms: First In First Out (FIFO): [2 .5 M] Reference String 5 6 7 6 8 7...
Operating System a. What is the meaning of the term busy waiting? What other kinds of...
Operating System a. What is the meaning of the term busy waiting? What other kinds of waiting are there in an operating system? Can busy waiting be avoided altogether? Explain your answers. (5 pts) b. Explain why spinlocks are not appropriate for single-processor systems yet are often used in multiprocessor systems. (5 pts) c. Using the program shown below, explain what the output will be at lines X and Y. Assume that you have a pre-emptive priority system. (10 pts)...
Question 7 30 pts Consider the following page reference string: {1,2,3,4,1,5,6,2,1,2,3,7,6,3} Assume that the system has...
Question 7 30 pts Consider the following page reference string: {1,2,3,4,1,5,6,2,1,2,3,7,6,3} Assume that the system has 4 page frames allocated to these 7 pages. Follow the page placement and replacement using the following three replacement algorithms: • LRU replacement • FIFO replacement • Optimal replacement How many page faults will occur for these three algorithms? Assume that all frames are initially empty, so your first unique pages will all cost one fault each USE ENCLOSED TABLES! Show all calculations in...
Describe the steps a system takes to handle a page fault. How do page faults affect...
Describe the steps a system takes to handle a page fault. How do page faults affect the overall process completion time? Do you believe thrashing would have a significant effect on the process completion time? Explain.
Show how many page faults are will occur if a process access the
following page sequence (reference string). Assume OS is using a
fixed number of 4 pages allocated for the process and is using
First-In-First-Out (FIFO) algorithm.
Count the faults acquired in the page table initialization.
Show your work by completing the following table:
Show how many page faults are will occur if a process access the following page sequence (reference string). Assume OS is using a fixed number...
Question 7 30 pts Consider the following page reference string: {1,2,3,4,1,5,6,2,1,2,3,7,6,3} Assume that the system has 4 page frames allocated to these 7 pages. Follow the page placement and replacement using the following three replacement algorithms: • LRU replacement • FIFO replacement • Optimal replacement How many page faults will occur for these three algorithms? Assume that all frames are initially empty, so your first unique pages will all cost one fault each USE ENCLOSED TABLES! Show all calculations in...
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