Cochin University of Science and Techology (CUST) 2008 B.Tech Information Technology Distributed computing - exam paper
BTS(C) - VII- 08-053-A
B. Tech Degree VII Semester Examination, November 2008
IT 704 DISTRIBUTED COMPUTING
(2002 Scheme)
Maximum Marks: 100
How inter process communication operations are implemented in Unix System? (10)
What is an RMI? With the help of diagrams explain briefly how remote and local
method invocations take place in distributed object model. (10)
OR
Describe briefly about the challenges one may face in the design of a distributed system. (20)
What is Thread? How multithreading is different from multi processing? (10)
How synchronization among threads and scheduling between threads is taking
place in Java? (10)
OR
Discuss briefly about the different architectures of a kernel suitable for a distributed system. (10)
Describe the architecture of NFS briefly? How mount service is implemented in NFS? (10)
V. (a) What is the need of clock synchronization? Differentiate between external and
internal synchronization. (10)
(b) Describe briefly the characteristics of NTP. (10)
OR
VI. (a) Explain how clock synchronization is achieved in Christian method. (10) (b) What do you mean by mutual exclusion? Give any one algorithm for handling
mutual exclusion problem. (10)
VII. (a) What are the ACID properties of a data transaction? Explain. (10) (b) With the help of examples describe the characteristics and advantages of nested
transactions. (10)
OR
VIII. Write short notes on the following :
(i) Read lock and write lock (ii) Dirty Read
(iii) Lost update problem (iv) Pre-mature writes (5x4 = 20)
IX. (a) Define replication. Why replication is important in distributed systems? (10) (b) Describe briefly about virtual partition algorithm. (10)
OR
X. (a) Differentiate symmetric and asymmetric cryptographic techniques. (10) (b) Briefly describe the working principle of SSL protocol. (10)
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