Download JNTUA MCA 2017 Nov Reg-Supply 4th Sem 9F00405a Distributed Systems Question Paper

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Code: 9F00405a

MCA IV Semester Supplementary Examinations November/December 2017

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DISTRIBUTED SYSTEMS

(For students admitted in 2012, 2013, 2014 & 2015 only)

Time: 3 hours Max. Marks: 60

Answer any FIVE questions

All questions carry equal marks

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1. (a) Discuss the various challenges to be met in designing a distributed system.
   (b) What are the main types of network that are used to support distributed system?
2. (a) Explain the issues relating to datagram communication and Java API for this.
   (b) What is a multicast communication? How is it useful in constructing a distributed system?
3. (a) Discuss RMI invocation semantics as the design issue.
   

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   (b) Explain the architecture for distributed event notification.
4. (a) Describe how middleware is supported by the operating system facilities at the nodes of a distributed system.
   (b) What is the cost of creating a new thread in an existing execution environment?
   (c) Make a comparison of monolithic and microkernel approaches.
5. (a) Explain the characteristics of file system.
   

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   (b) Describe the architecture of SUN network file-system.
6. What are the main types of uniform resource identifier?
   (a)
   (b) Discuss different types of DNS queries.
   (c) Explain Cristian’s method for synchronizing clocks.

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7. (a) Discuss the phases of two-phase commit protocol and its performance.
   (b) How are deadlocks handled in distributed system?
8. (a) Describe the advantages of shared — memory programming model over message — based models.
   (b) Explain in detail design goals and chief design features of Mach.

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