Biju Patnaik University of Technology 2010 M.C.A Distributed systems - Question Paper

Fifth Semester Examination- 2010
DISTRIBUTED SYSTEMS
Time:3 Hours
Max. Marks:70

ans ques. No. one which is compulsory and any 5 from the rest.
The figures in the right-hand margin indicate marks.

1. ans the subsequent :- [2*10=20]

(a) describe fault tolerance in distributed system.

(b) What is a resource manager in distributed system ?

(c) Name 4 basic design problems of a distributed system.

(d) What tech. factors led to the displacement of multi-user-minicomputer ?

(e) How does the client discover the identity of the servers ?

(f) Distinguish ranging from buffering and caching.

(g) Distinguish ranging from multicast and broadcast in communication.

(h) Write any 4 role of the kernel.

(i) Write any 2 advantages of blocking form of send.

(j) Write the 2 classes of RPC system.

2. (a) What characteristics of UNIX made it more open than the systems that preceeded it ? [5]

(b) explain any 5 characterstics of distributed system. [5]

3. (a) explain suitable design goals for file service with respect to the reliability, scalability, consistency and security problems. [5]

(b) Are shared memory multiprocessor distibuted system ? discuss with example. [5]

4. (a) explain the broad characteristics of a distributed operating system. [5]

(b) What is meant by kernel ? explain the function of a kernel suitable for a distributed system. [5]

5. What is RPC ? explain the invocation performance ranging from address space i.e. [4+6]

(i) System call

(ii) RPC within 1 computer

(iii) RPC(between computers)


6. (a) explain the components of the file service and their relationships of the distributed system. [5]

(b) What is meant by SNS ? explain the basic requirements and limitations of design of SNS. [5]

7. (a) Why is computer clock Synchronization necessary ? define the design requirements for a system to synchronize the clocks in a distributed system. [5]

(b) explain the factors to be taken into account when deciding to which NTP(Network Time Protocol) server a client should synchronize ? [5]

8. Write notes on any 2 of the subsequent : [5+5]

(a) DNS

(b) Distributed mutual exclusion

(c) Thread scheduling

(d) IDL(Interface Definition Language).

Earning:   Approval pending.