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CS2411 Operating System - Unit 4 and 5 - Monthly Test - Oct 2012 Question Paper

Anna University

Department of Electrical and Electronics Engineering

Subject Code  : CS 2411

Subject name :Operating Systems


Department :EEE

Duration: 3 Hour
Max Marks: 100
Answer All the questions
                                              Part – A                           (10 X 2 = 20)

1. What is a file?
2. What are the different accessing methods of a file?
3. What is Directory?
4. Define UFD and MFD.
5. What are the functions of virtual file system(VFS)?
6. What is low-level formatting?
7. What is the use of boot block?
8. What is sector sparing?
9. Define device drivers.
10. List out the components of Linux system?

                                                  Part – B                            (5 X 16 = 80)

1. (a)What are files and explain the access methods for files?                      (16)
   (b)Write notes about the protection strategies provided for files.              (16)

2. (a)What are the various methods for free space management?                 (16)
   (b)Explain in detail about file system implementation.                              (16)

3. (a)Explain the allocation methods for disk space.                                      (16)
   (b)Write notes about disk management and swap-space management.  (16)

4. (a)Explain on detail about RAID.                                                               (16)

   (b) Explain in detail about tertiary storage structure removable.                (16)

5. (a) Explain in detail about I/O hardware.                                                    (16)

(b)(i) Consider the request queue as [98,183,37,122,14,124,65,67]. Currently the
    Head pointer is at 53. Find the seek time using SST,SCAN and LOOK schemes.
    (ii) How many page faults occur for the LRU and Optimal algorithm for the following reference string for four page frames?     1,2,3,4,5,3,4,1,6,7,8,7,8,9,7,8,9,5,4,5,4,2                                                         (08)

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