OPERATING SYSTEMS-OCTOBER-2010

FOURTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY-OCTOBER, 2010

OPERATING SYSTEMS

PART-A

(Maximum marks:15)

v  Answer the following questions in one or two sentences:

1.Explain virtual memory.

2.Explain parallel systems.

3.Describe CPU bound process.

4.List the benefits of multithreaded programming.

5.Describe page table.

6.Explain Least Recently Used(LRU)page replacement algorithm.

7.Describe system call.

8.Describe index block.

9.Explain ‘fork’command.

10.Define ‘inode’table.

PART-B

(Maximum marks:60)

(Answer one full question from each unit)

Unit-1

v  (a)Explain client-server systems..(6)

          (b)Describe clustered systems..(6)

OR

v  (a)Explain the storage hierarchy in computersystems.(6)

(b)Give activities of operating system for main memory management.(6)

Unit-2

v  (a)Explain preemptive and non-preemptive scheduling schemes.(6)

(b)Describe different methods to handle the dedlock.(6)

         

OR

v  (a)Explain FCFS,SJF and priority CPU scheduling schemes.(6)

          (b)Explain resource allocation graph with an example(6)

UNIT-3

v  (a)Explain segmentation with segmentation hardware.(6)

          (b)Explain virtual memory concept with suitable diagram.(6)

OR

v  Explain different page replacement algorithms with suitable diagrams.Give advantages and disadvantages.(12)

UNIT-4

v  Describe different disk scheduling algorithms.(12)

OR

v  (a)Explain indexed and linked allocationschemes.(6)

          (b)Describe layered file system structure.(6)

UNIT-5

v  Explain the mechanism for process creation in Linux(12)

        

OR

v  (a)Describe internal,external commands(6)

(b)Explain fork,shell scripts in linux os.(6)

        

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