Download GTU B.Tech 2020 Winter 7th Sem 2173208 Distributed Computing Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020

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Subject Code:2173208 Date:30/01/2021

Subject Name:Distributed Computing

Time:10:30 AM TO 12:30 PM Total Marks: 56

Instructions:

1. Attempt any FOUR questions out of EIGHT questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. Compare the pros and cons of microkernel and monolithic kernel approach. [03]
2. Network system protocols are unsuitable for distributed systems. Explain. [04]

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3. Explain issues related to designing of distributed operating system. [07]

Q.2

1. Can two computers on the internet have the same IP address? Justify. [03]
2. What is process addressing? Explain commonly used methods for process addressing. [04]
3. What is non-idempotent routine? How such routine creates problem with message passing? Also explain its solution with example. [07]

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Q.3

1. What is acknowledgement message? Why is it always needed for reliable communication? [03]
2. Explain orphan call. How are orphan calls handled in the implementation of various-call semantics? [04]
3. Explain FLIP protocol. [07]

Q.4

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1. What is the major difference between physical and logical clocks? [03]
2. Explain ‘happened-before’ relationship. [04]
3. What is the main difference between stateless and stateful servers? Which servers are used in distributed applications? [07]

Q.5

1. List out issues in designing a thread package. [03]

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2. Discuss the four necessary and sufficient conditions for a deadlock to occur. Give suitable examples to show that a deadlock cannot occur if any one of the four conditions is absent. [04]
3. Explain Client server Binding Mechanism. [07]

Q.6

1. Compare active replication and primary backup methods. [03]
2. Explain the address space transfer mechanism for process migration in brief. [04]

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3. Explain Global averaging distributed algorithm for clock synchronization. [07]

Q.7

1. Discuss the task assignment approach. [03]
2. Explain the following deadlock prevention techniques: [07]
   1. Collective requests
   2. Ordered requests

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Q.8

1. Can false sharing be completely eliminated? [03]
2. Write Short note on : DNS [04]
3. Explain the DSM system architecture. How does granularity affect DSM system performance? [07]

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