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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER M.TECH DEGREE EXAMINATION, DECEMBER 2017
Computer Science and Engineering
(Common to M.Tech CSE/Cyber Security)
(07-CS-6111 DISTRIBUTED AND MOBILE OPERATING SYSTEMS)
Max. Marks: 60 Duration: 3 Hours
Answer all six questions. Part of each question is compulsory.
Answer either part or part of each question
Q.no. Module 1 Marks
1a Compare and contrast distributed system over centralized system. 4
Answer b or c
b Discuss in detail about sweep algorithm. Also discuss how it overcome the flaws of
the existing system
5
c You need to send a common message to your friends Which mechanism is active
to solve this situation in distributed system, explain its working
.
5
Q.no. Module 2 Marks
2a Why logical clock is required? Point out the conditions to be satisfied by logical
clocks?
4
Answer b or c
b Show how wait-die and wound-wait protocol ensures prevention of deadlocks. 5
c Explain in detail about the mechanisms used to handle deadlocks in distributed
systems
5
Q.no. Module 3 Marks
3a How thread is implemented in user space? 4
Answer b or c
b "Dynamic scheduling is a good fit for an event triggered design" Comment on the
statement.
5
c Illustrate with diagrams, explain about system models in distributed systems 5
Q.no.
Module 4
Marks
4a Compare and contrast on-chip memory and switched multiprocessors. 4
Answer b or c
b How shared-variable distributed shared memory offers advantages over the pagebased
distributed shared memory methods.
5
c How page-based distributed shared memory works with the concepts of replication
and how it achieves sequential consistency?
5
Q.no. Module 5 Marks
5a What is the role of resource manager and with diagram explain service life cycle 5
Answer b or c
b The main building blocks are componets that you use as an application developer to
build Android apps, Substantiate this statement with example.
7
c You are going to create a whatsapp app. You need to override some callback
methods that handle key aspects of the activity life cycle. What are they?
7
Q.no. Module 6 Marks
6a Note down the importance of AndroidManifest.xml file. 5
Answer b or c
b While you are developing a sms based app for time table management in android,
what should be its building blocks
7
c Explain Android architecture in detail. 7