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Code No: 824AF Rl 5
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
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MCA 1V Semester Examinations, June/July - 2018
DISTRIBUTED SYSTEMS
Time: 3hrs Max.Marks:75
Note: This question paper contains two parts A and B.
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Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
5 x 5 Marks =25
- a) Describe the limitations of distributed systems. 5
- b) Explain RML 5
- c) Define cast communication. 5
- d) Mention the locking rules for nested transaction. 5
- e) With an example discuss about digital signature. 5
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PART -B
5 x 10 Marks = 50
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- a) Discuss design issues of Distributed Systems.
b) Discuss Network Technologies and Protocols in Distributed Systems. [5+5]
OR - Explain Interprocess communication in detail. [10]
- a) Distinguish between processes and Threads.
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b) Explain various distributed file System components in detail. [5+5]
OR - a) Discuss about X.500 Directory structure.
b) Explain the concept of Process creation and communication. [5+5] - Explain following Synchronizing physical clocks.
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a) Cristian’s method for synchronizing clocks.
b) The Berkeley algorithm. [5+5]
OR - a) Explain Atomic commit protocol.
b) Explain Network Time Protocol. [5+5] - a) Explain distributed deadlocks.
b) Explain Hierarchical and group masking of faults. [5+5]
OR - a) Distinguish cache consistency from replica consistency.
b) Characterize a distributed system. Explain the term — Transparency. [5+5]
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- a) Discuss digital signatures with public keys and with secret keys.
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b) Write about key distribution. [5+5]
OR - Explain the following
a) Nested transactions
b) Release consistency and Munin. [5+5]
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