Mahatma Gandhi University (MGU) 2008 M.C.A Computer Aplications - Question Paper

M.C.A. (AFFILIATED COLLEGE) DEGREE EXAMINATION, OCTOBER 2008
ans any 5 ques..
every ques. carry 15 marks.
1 (a) discuss the characteristics of multi programmed systems and time sharing systems? Under what circumstances would a user be better using a time sharing system, rather than PC or single user work station ? (8 marks)
(b).What do you mean by serial processing and batch processing? (7 marks)

2 (a) Distinguish ranging from process based and thread based multiprogramming. How the Operating System manages these multiprogramming methods. discuss. (7 marks)
(b)What is a process?Write and discuss all possible states of a process? (8 marks)

3 (a) Do you think scheduling is fundamental Operating System function ? provide a detailed explanation for substantiating your ans. (8 marks)
What is a dispatcher?Write the role of dispatcher in scheduling? (7 marks)

4 (a) What is dining Philosopher's issue and how it is related with operating systems? (6 marks)

(b) Inter Process Communication is a good mechanism in modern Operating Systems. How this mechanism help the Operating system to run more efficiently. discuss. (9 marks)

5 (a) Can a system detect that a few of its processes are starving? If you ans yes, discuss how it can? If you ans no, discuss how the system can deal with the starvation issue. (5 marks)
(b) What is deadlock? How it will affect the system seriously? Is there any solution for this problem? discuss. (10 Marks)


6 (a) Under what circumstances do page faults occur? define the actions taken by the operating system when a page fault occurs? 10 Marks

(b) What is paging? Why page size is always power of two ? five Marks
7 (a) discuss the segmentation with paging schema in detail (12 Marks).
(b) What is- thrashing? elaborate the causes of thrashing ? (3 marks)



8 (a) elaborate the basic file operations? What the operating system must do for every of these file . operations? eight Marks
(b) Why rotational latency is usually not considered in disk scheduling? How would you replace SSTF, SCAN and C-SCAN to include latency optimization? (7 marks)

(5 x 15 = 75 marks)

Earning:   Approval pending.