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2003 Course Distributed Systems

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Total No. of Questions :12] P1107 [Total No. of Pages : 2 [3864] - 424 B.E. (Information Technology) DISTRIBUTED SYSTEMS (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer question 1 or 2, 3 or 4, and 5 or 6 from section - 1 and question 7 or 8, 9 or 10, and 11 or 12 from section - II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Assume suitable data, if necessary. SECTION - I Q1) a) b) Q2) a) b) Q3) a) b) Q4) a) b) Q5) a) b) List and explain advantages and disadvantages of distributed systems over centralized system. [8] Explain with neat diagram architectural Models of distributed systems.[8] OR What are the various challenges for designing distributed systems? [8] What are the services offered by middleware in a distributed system? [8] Describe working of Remote Procedure Call in client server communication with suitable diagram. [8] What is group communication? Explain different types of group communication. [8] OR What is RMI? Explain types of RMI invocation semantics. [8] What is Call Back RPC? How does a server handle Call Back to the client? [8] Highlights desirable features of a good distributed file system. List the functions of distributed file system. [10] Explain different types of file sharing semantics. [8] OR P.T.O. Q6) a) b) Q7) a) b) Q8) a) b) c) Q9) a) b) Q10)a) b) Q11)a) b) Q12)a) b) Draw and explain NFS architecture and give detail functions of layers. [10] Write a short note on CODA file system. [8] SECTION - II Explain the following: [8] i) Physical Clock. ii) Network Time Protocol. iii) Drift Rate. iv) Happened before relation. What is a distributed Deadlock? What are the necessary conditions for deadlock to occur in distributed environment? [8] OR Explain the reasons for drift in computer clocks. [4] Enumerate the various issues in clock synchronization. [6] What is Election Algorithm? Explain in brief about Bully algorithm? [6] What is Fault tolerance? Explain different types of failures. [8] What is check pointing? Explain independent check pointing and coordinated check pointing. [8] OR What is message ordering? Explain FIFO order and causally ordered multicast. [8] What is recovery? What is backward and forward recovery? [8] Draw and explain CORBA architecture. [10] Explain : OBV, CCM, GIOP, DDS. [8] OR Explain cluster computing system with working, types of clusters and how it can be used as an alternative to traditional super computers. [10] Write short note on Grid Computing. [8] jjj [3864]-424 2

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