Download JNTUH MCA 4th Sem R15 2019 December 824AF Distributed Systems Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 4th Sem (Fourth Semester) Regulation-R15 2019 December 824AF Distributed Systems Previous Question Paper

R15

Code No: 824AF













JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA IV Semester Examinations, December - 2019

DISTRIBUTED SYSTEMS

Time: 3hrs













Max.Marks:75

S

Note: This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries
10 marks and may have a, b, c as sub questions.



PART - A



















5 ? 5 Marks = 25



1.a) What are the advantages and disadvantages of distributed systems?



[5]

b) What is Domain Name System? Give examples.









[5]

c) Discuss about Napster and its legacy.











[5]

d) Differentiate between flat and nested distributed transactions.





[5]

e) Explain about Kerberos and TLS.











[5]



PART - B

















5 ? 10 Marks = 50



2.

How distributed systems are characterized? Give examples of distributed systems and
their challenges.

















[10]

OR

3.

What is RPC? Write the features of RPC and explain how RPC is used in UNIX system.






















[10]



4.

What is Distributed File System? Explain about Distributed file system implementation.






















[10]

OR

5.

Discuss about the case study of SUN Network file system.





[10]


6.

What is Clock Synchronization? Write about Berkley algorithm.



[10]

OR

7.

What is the significance of mutual exclusion in distributed systems? Distinguish between
token-based solutions non-token based counterparts to distributed mutual exclusion.[10]



8.

What is group communication? Explain the design issues and categories of group
communication in detail.















[10]

OR

9.

Explain how deadlocks occur in distributed systems. Discuss their preventive methods.






















[10]


10.

Differentiate between page based and shared variable Distributed Shared Memories. [10]

OR

11.

Explain consistency models and make a comparison between release and entry
consistency models.















[10]



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