Distributed System - May 2012

Information Technology (Semester 6)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Explain distributed, computing systems models with diagram.(10 marks) 1 (b) Explain desirable features of a good distributed file system.(10 marks) 2 (a) Compare and contrast Mutual Exclusion Algorithms(10 marks) 2 (b) Explain Failure handling mechanism in message passing.(10 marks) 3 (a) Discuss the issues in designing Load-balancing algorithm.(10 marks) 3 (b) Explain communication protocols for RPC.(10 marks) 4 (a) Explain Stateful file servers and stateless file servers and its advantages.(10 marks) 4 (b) Write a note on Group Communication.(10 marks) 5 (a) Write a note on System Oriented names and Human Oriented Names.(10 marks) 5 (b) Explain different distributed physical clock synchronization algorithms with their relative advantages and disadvantages.(10 marks) 6 (a) Explain various consistency models in DSM.(10 marks) 6 (b) Explain RPC implementation mechanism.(10 marks)

Write short notes on (any four)

7 (a) Thrashing(5 marks) 7 (b) Token Ring Algorithm(5 marks) 7 (c) DCOM(5 marks) 7 (d) File - Caching Schemes(5 marks) 7 (e) Process Migration(5 marks) 7 (f) Naming and security(5 marks)