Cochin University of Science and Techology (CUST) 2005-6th Sem B.Tech Computer Science and Engineering ,, OPERATING SYSTEMS - Question Paper

B.Tech Degree VI Semester Examination, November 2005
IT/CS 602 OPERATING SYSTEMS


Time: three Hours Maximum Marks: 100

I a) discuss the operating system structure? [Marks 8]
b) discuss various kinds of operating systems? [Marks 12]
OR
II Explain what do you meant by race condition. discuss the possible solutions to avoid race condition. [Marks 20]

III Briefly discuss any 3 page replacement algorithms with example. [Marks 20]
OR
IV a) What do you meant by associative memory? [Marks 8]
b) explain the different problems of paging system. [Marks 12]

V a) discuss DMA [(Marks 12]
b) Explain:
(1) Device controller.
(2) Device drivers. [Marks 8]
OR
VI a) explain the disk arm scheduling algorithm
(1) SSTF
(2) Elevator algorithm. [Marks 15]
b) describe the terms:
(1) Seek time
(2) Latency time. [Marks 5]

VII a) Differentiate ranging from safe and unsafe state. [Marks 5]
b) discuss Banker’s algorithm. [Marks 10]
c) What is starvation? [Marks 5]
OR
VIII a) discuss how deadlock detection and recovery are done. [Marks 12]
b) discuss 2 phase locking. [Marks 8]

IX Write short note on any four
a) Distributed operating system
b) Client server model.
c) RPC
d) Threads
e) Clock synchronization. [Marks 20]

*****

Earning:   Approval pending.