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BTS C)— VII— 11.12 — 052 - 0

B T ech Degree V II Sem ester Examinat ion Novem ber 2012

CS/IT 704

DISTRIBUTED COMPUTING

 2006 Scheme)

Time : 3 Hours

aximum Marks : 100

PART A

 Answer ALL

questions)

  8 x 5 = 40)

I.

 

a) xplain inter process communication in UNIX.

Write short notes on external data representation and m arshalling.

Explain the design requiremen ts of a distributed file system.

Differentiate m onolithic kernel and micro kernel.

What is the ne ed for clock in distributed system? D ifferentiate clock skew an d clock drift .

Explain how clock synchronization is achieved in Christian method.

Explain distributed database design.

  h)

 

hat do you mean by optimistic concurrency control?

P RT B

 4 x 15

= 60)

IL

Discuss the challenges of distributed system.

  15)

 

HI. Explain client server comm unication.

  15 )

Describe processes and threads in detail.

  15 )

 

Explain SUN NFS in detail

15)

VI. What is mu tual exclusion? Explain any one algorithm to impleme nt mutual exclusion.   10 )

Explain the basic architectural model for the m anagem ent of replicated data.

  5)

 

VII.

Explain logical time an d logical clocks.

  10 )

What is network time protocol?

  5)

Explain the deadlocks in a distributed system in detail.   15)

 

Explain transaction recove ry in detail .   15 )

***

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BTS C) — VII S) — 06 .12 — 037 — 0

B T ech Degree V II Sem ester Special Supp lem entary

Examination June 2 12

CS IT 704 DISTRIBUTED COMPUTING

 2006 Scheme)

Time : 3 Hours

 

aximum Marks : 100

P RT

Answer

LL

questions)

 8 x 5 = 40)

I.

 

a)

 

efine the key cha racteristics of a distributed system.

Write a short note on client server comm unication.

Com pare process and threads.

What are the basic requirements for SN S?

Briefly explain the network time protocol.

Explain the mo tivations for replication.

Describe the problems involved in concurrent transaction.

  h)

 

hat do you mean by locks? Explain.

PART B

II .

  a)

 4x 15 =

Differentiate between R PC and conventional procedure calling.

Explain Sun RPC in detail.

OR

Explain 

he main categories of software

 

n istributed system 

nd their

dependencies.

60)

  7)

  b)

Describe the ba sic design issues for distributed services.

  8)

IV .

  a)

Explain the techniques used for the implementation of file services.

  7)

  b)

Discuss the requirements of a distributed file service

8)

OR

V.

  a)

Explain the design goals of Sun NFS

7)

  b)

Draw NFS software architecture and describe each of its components.

  8)

VI.   a) Write a short essay on the Berkeley algorithm.

  7)

  b)

Discuss the central server algorithm in detail

8)

OR

VII.   a)

Explain a basic architectural model for the management of replicated data.

  7)

  b) Enumerate a gossip replica manager with its state components.

  8)

VIII. Describe the two approaches used for increasing concurrency in locking schemes.

  5)

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