RGPV Computer Science (Semester 5)
Operating System
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1(a) What is Bare machine?
2 M
1(b) What is the purpose of system calls?
2 M
1(c) How a time sharing operating system differs from batch operating system?
3 M
Solve any one question from Q.1(d) & Q.1(e)
1(d) How many types of operating system are there? Explain each of them.
7 M
1(e) Discuss different structures of operating system with advantages and disadvantages.
7 M

2(a) What is kernel I/O subsystem?
2 M
2(b) Define the term Disk Reliability.
2 M
2(c) Explain free space management technique.
3 M
Solve any one question from Q.2(d) & Q.2(e)
2(d) Compare file system in windows and Linux.
7 M
2(e) Explain various methods of accessing file with examples
7 M

3(a) Define deadlock
2 M
3(b) Write the use of Process Control Block and discuss its contents.
2 M
3(c) What is hard and soft semaphore?
3 M
Solve any one question from Q.3(d) & Q.3(e)
3(d) What resources are used when a thread is created? ?How do they differ from those used when a process is created?
7 M
3(e) Describe about how recovery from deadlock.
7 M

4(a) What is thrashing?
2 M
4(b) Compare paging and segmentation.
2 M
4(c) Differentiate between external and internal fragmentation.
3 M
Solve any one question from Q.4(d) & Q.4(e)
4(d) What advantages does segmentation offer over multiple variable partitions?
7 M
4(e) Explain Cache Memory organization
7 M

5(a) What is Parallel Processing ?
2 M
5(b) Define Distributed Shared Memory.
2 M
5(c) Give the difficulties which can be encounter while implementing a distributed operating system.
3 M
Solve any one question from Q.5(d) & Q.5(e)
5(d) Explain the major issues in implementing the Remote Procedure Call (RPC) mechanism in distributed operating system.
7 M
5(e) Write a brief notes on parallel operating system.
7 M



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