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8/9/2019 Rr410502 Distributed Sytems
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Code No: RR410502 Set No. 1
IV B.Tech I Semester Regular Examinations, November 2007DISTRIBUTED SYTEMS
( Common to Computer Science & Engineering and Electronics &Computer Engineering)
Time: 3 hours Max Marks: 80Answer any FIVE Questions
All Questions carry equal marks⋆ ⋆ ⋆ ⋆ ⋆
1. (a) Define concurrency and parallelism. What opportunities for parallelism arisein distributed client-server systems?
(b) How can the design of a distributed system ensure that it will be scalable?[4+4+8]
2. Compare and explain times for Synchronous and Asynchronous Remote ProcedureCalls with suitable diagrams. [8+8]
3. (a) Explain the advantage of copy-on-write region copying for UNIX, where a callto fork is typically followed by a call to exec.
(b) What should happen if a region that has been copied using copy-on-write isitself copied? [8+8]
4. Explain about logical time and logical clocks. [8+8]
5. Explain how the conversation takes place between a client and a server in detail.[16]
6. Explain about two-phase commit protocol for nested transaction. [16]
7. Explain log for banking service with relevant diagram. [10+6]
8. Summarize the abstractions provided by the Mach Kernel in detail. [16]
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Seminar Topics - Scholarships - Admission/Entrance Exam Notifications
USA-UK-Australia-Germany-France-NewZealand Universities List
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Code No: RR410502 Set No. 2
IV B.Tech I Semester Regular Examinations, November 2007DISTRIBUTED SYTEMS
( Common to Computer Science & Engineering and Electronics &Computer Engineering)
Time: 3 hours Max Marks: 80Answer any FIVE Questions
All Questions carry equal marks⋆ ⋆ ⋆ ⋆ ⋆
1. Draw the diagrams of Distributed System with its components based on local net-work and centralized multi user system. Distinguish them. [8+8]
2. (a) What are multicast messages? Where is it implemented? And what are thecharacteristics of it?
(b) Explain about with respect to Group Communication:
i. Atomicity
ii. Ordering. [2+2+4+4+4]
3. (a) Can a server invoked by light weight procedure calls control the degree of concurrency within it? Explain.
(b) Explain why and how a client is prevented from calling arbitrary code within
a server under lightweight RPC. [8+8]
4. Explain Cristian’s method for Synchronising clocks. [16]
5. (a) Explain backward validation and forward validation.
(b) Compare forward and backward validation and explain about starvation.[8+8]
6. What are the operations for the two phase commit protocol? Explain with a dia-gram. [10+6]
7. What are various characteristics of faults. [16]
8. Summarize the abstractions provided by the Mach Kernel in detail. [16]
⋆ ⋆ ⋆ ⋆ ⋆
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Seminar Topics - Scholarships - Admission/Entrance Exam Notifications
USA-UK-Australia-Germany-France-NewZealand Universities List
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www.andhracolleges.com The Complete Information About Colleges in Andhra Pradesh
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Code No: RR410502 Set No. 3
IV B.Tech I Semester Regular Examinations, November 2007DISTRIBUTED SYTEMS
( Common to Computer Science & Engineering and Electronics &Computer Engineering)
Time: 3 hours Max Marks: 80Answer any FIVE Questions
All Questions carry equal marks⋆ ⋆ ⋆ ⋆ ⋆
1. (a) Are shared memory multiprocessors distributed systems? Explain
(b) Contrast the problems of implementing process migration between work sta-
tions and between processors within a shared memory multiprocessor.[2+6+4+4]
2. (a) What are three protocols involved in RPC Exchange Protocols? Explain.
(b) Explain about the following:
i. an Idempotent Operation
ii. Multipacket messages. [2+6+4+4]
3. Why should UFIDs be unique across all possible file systems? How is uniquenessfor UFIDs ensured? [8+8]
4. (a) Explain the central server algorithm.
(b) Explain distributed algorithm using logical clocks. [8+8]
5. (a) Explain backward validation and forward validation.
(b) Compare forward and backward validation and explain about starvation.[8+8]
6. How the virtual partitions are implemented ? [16]
7. Explain about Needham- Schroeder secret key authentication protocol. [16]
8. Discuss design and implementation issues of Distributed-Shared memory. [16]
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Seminar Topics - Scholarships - Admission/Entrance Exam Notifications
USA-UK-Australia-Germany-France-NewZealand Universities List
Engineering-MBA-MCA-Medical-Pharmacy-B.Ed-Law Colleges Information
www.andhracolleges.com The Complete Information About Colleges in Andhra Pradesh
www.andhracolleges.com
Code No: RR410502 Set No. 4
IV B.Tech I Semester Regular Examinations, November 2007DISTRIBUTED SYTEMS
( Common to Computer Science & Engineering and Electronics &Computer Engineering)
Time: 3 hours Max Marks: 80Answer any FIVE Questions
All Questions carry equal marks⋆ ⋆ ⋆ ⋆ ⋆
1. Draw the diagrams of Distributed System with its components based on local net-work and centralized multi user system. Distinguish them. [8+8]
2. Compare and explain times for Synchronous and Asynchronous Remote ProcedureCalls with suitable diagrams. [8+8]
3. Draw and explain NFS software architecture. [6+10]
4. Explain the following.
(a) Clock drift
(b) Coordinated Universal Time. [8+8]
5. Explain ACID properties and how the transaction are failure and how they are
recovered ? [16]
6. Explain the architecture for replicated transactions. [16]
7. Explain various methods of attacking and defenses. [16]
8. Summarize the abstractions provided by the Mach Kernel in detail. [16]
⋆ ⋆ ⋆ ⋆ ⋆
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