D 10000CS407122002 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Seventh Semester B.Tech Degree Regular and Supplementary Examination December 2021 (2015 Scheme)

Course Code: CS407
Course Name: DISTRIBUTED COMPUTING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 4 marks. Marks
1 Differentiate between tightly coupled and loosely coupled systems. (4)
2 Distributed system is characterized with no global clock. Explain. (4)
3 Define mobile code and give examples of applications where the use of mobile (4)

code is beneficial.

4 Distinguish between synchronous and asynchronous communication (4)
5 Explain the concepts of Domain Name space and Resource records. (4)
6 What do you mean by Network virtualisation? Illustrate with an example. (4)
7 Summarize serial equivalence with the help of an example. (4)
8 Explain why hierarchic locks are needed? Illustrate with example (4)
9 How does the Bully algorithm perform failure detection through time outs? (4)
10 Describe the working of Ring based election algorithm. (4)
PART ‏تا‎
‎Answer any two full questions, each carries 9 marks.
11 a) Write notes on evolution and trends in distributed systems. (5)

b) Distinguish between minicomputer model and processor pool model with neat (4)
diagram.
12 a) Explain the term threats in distributed systems.Describe the different threats (5)

exist and how it can be resolved.

b) What is meant by Omission Failure?List and explain its classes. (4)
13 a) Give brief description on the three types of communication paradigms by which (6)
the entities in a distributed system communicate.

b) Differentiate between client server and peer-peer architectural model. (3)

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