Manipal University 2009 B.E Computer Science and Engineering University: ; : ; Title of the : Distributed Systems Make up - Question Paper

MANIPAL INSTITUTE OF TECHNOLOGY
(Constituent Institute of Manipal University)
MANIPAL 576104

7th SEMESTER B.E DEGREE EXAMINATIONS-2009
DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING
DISTRIBUTED SYSTEMS [CSE 401]

Note: (i) ans ANY 5 FULL ques.
(ii) All sub ques. caries 5 Marks every


TIME: 03 HOURS] [MAX.MARKS: 50


Summary: This is a make up ques. paper of year 2009 of Distributed Systems subject and it will help the students expertise on the subject and will add to their knowledge.

Reg. No

MANIPAL INSTITUTE OF TECHNOLOGY

(Constituent Institute of Manipal University) MANIPAL576104

SEVENTH SEMESTER BE DEGREE EXAMINATIONS-2009 DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING DISTRIBUTED SYSTEMS [CSE 401]

Note: (i) Answer ANY FIVE FULL questions

(ii) All sub questions caries FIVE Marks each TIME: 03 HOURS]    [MAX.MARKS: 50

Q1.

a)    Explain different variations of basic client and server model.

b)    Discuss the various failure models in Distributed Systems.

Q2.

a)    What is the need for External Data Representaion in Distributed Systems? Explain CORBA's Common Data Representaion(CDR).

b)    Present a Case study of interprocess communication in Unix covering Datagram communication and Stream communication.

Q3.

a)    Explain various RMI invocation sematics and thier failure models.

b)    Draw the architecture of distributed event notiication and explain the roles of each participating object.

Q4.

a)    A file server uses caching, and achieves a hit rate of 80%. File operations in the server costs 5 ms of CPU time when the server finds the requested block in the cache, and takes an additional 15 ms of disk I/O time otherwise. Explaining any assumptions you make, estimate the server's throughput capacity(average request/sec) if it is

(i)    single-threaded

(ii)    two-threaded, running on a single processor.

b)    Explain how authenticated communication with a file server takes place using shared secret key(session key)

Q5.

a)    Explain SUN Network File System Architecture with a neat diagram.

b)    With suitable diagram explain different navigation schemes for name resolution.

Q6.

a)    Explain the lost update problem and inconsistent retrival problem. How this can be solved? Explain with suitable examples.

b)    What is Distributed Database Management System? What are its components? List the services provided by DDBMS and Discuss the types of access to DDB.

Attachment: manipal-university-2009-b-e-computer-science-and-engineering-3373-1.pdf

Earning:   Approval pending.