OPERATING SYSTEM 2007 - B.E

PART-A
1) Specify the critical factor to be strictly followed in real time system.
2) List out the three main advantages of multiprocessor system.
3) What is co-operating process?
4) What is bounded waiting in critical section?
5) What are the four necessary conditions a system should possess in order to be termed as deadlock?
6) What is segmentation?
7) Why should we use virtual memory?
8) What is meant by thrashing?
9) Name the entries that make up a File Control Block (FCB)?
10) State any two distinguishing features of UUNIX and Windows.

PART-B
11) a) i) Explain the facilities provided by the following operating systems
(1) Clustered system and 
(2) Real time system.
ii) List out the services provided by the operating system to programs and to the 
users of program.
(or)
b) i) Explain the process creation and process termination on process.
ii) Write short notes on co-operating processes and schedulers.
12) a) Describe the following scheduling algorithms
(i) Shortest job first scheduling
(ii) Round robin scheduling
(iii) Real time scheduling
(iv) Priority scheduling.
(or)
b) What is the important feature of critical section? State the dining philosophers 
problem and show how to allocate the several resources among several 
processes in a deadlock and starvation free manner.

13) a) i) How can deadlock be detected? Explain. 
ii) Write short notes on swapping.
(or)
b) Discuss the advantages of paging memory management and the conversion of 
logical address into physical address with necessary hardware.
14) a) Discuss the following page replacement algorithms, giving a suitable page 
reference string (i) LRU (ii) FIFO (iii) Optimal.
(or)
b) i) State the various attributes of a file and their purpose.Discuss the various file. 
operation
ii) Discuss about demand paging.
15) a) Describe in detail any three methods of implementing the file system.
(or)
b) write short notes on:
(i) Disk structure
(ii) Indexed allocation
(iii) Shortest Seek Time First (SSTF) scheduling.