Latest B.Tech question paper of Distributed Operating System, Himachal Pradesh University

B.Tech VIIth Semester Examination, Distributed Operating System, HPU, December 2009

Note: Attempt five questions in all, selecting one from each Section A, B, C and D and all parts of Section E. All the sections carry equal marks (each question=20 marks).

Section- A

1.(a) Compare Network operating system and Distributed operating system.
(b) Describe in brief the various Inter-process Communication and Co-ordination mechanisms.

2.(a) Describe the ‘Name and Directory Services’.
(b) Explain Distributed Mutual Exclusion algorithm.

Section- B

3.What is the Real-Time Scheduling? How is dynamic load sharing and balancing done?
4.What are the characteristics of the Distributed File Systems? How is concurrency control achieved in DFS?

Section- C

5.Describe in detail Non-uniform memory access architecture.

6.How does authentication take place in distributed security? How is the key distribution done in this scenario?

Section- D

7.How can Deadlocks be prevented in distributed systems?

8.What are the various Consistency models? How are they implemented?

Section-E

9.All questions are compulsory. Write short answers for the following:

(a) Describe the purpose of pipes.
(b) Name any two co-operative autonomous applications.
(c) What is Load balancing?
(d) What are Memory Consistency models?
(e) Describe ‘Cryptography’.
(f) What are the ACID properties of a transaction?
(g) What are immutable files?
(h) Name any two deadlock detection algorithms for distributed environment.
(i) What are Nested transactions?
(j) What purpose do the locks serve in distributed systems?

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