a) State the Lamport's algorithm and its use and also the limitations and benefits.
Compare this with any two token based algorithms. (13) U 2
13. OR
b) E x p l a i n t h e s y s t e m m o d e l s w i t h i t s p r e l i m i n a r i e s
DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING a n d h o w i s i t characterized in the models of deadlock. (13) R 2
INTENSIVE COACHING TEST- 1 (UNIT 1&2) a) Explain the facts associated with agreement in failure-free systems of
CS3551– DISTRIBUTED COMPUTING both synchronous and asynchronous systems. (13) R 2
Category: A&B : FN 14. OR
Session
Year: I I I /V Section :A b) What are the different check pointing based recovery systems available?
Time: 3.00 Hours Max Marks : 100 A 2
Explain the coordinated check pointing algorithm with illustration. (13)
PART A (10×02=20 MARKS) a) A company like to have an advanced collaboration services like video,
chat and web conferences for their employees, but their system does not
Sl. NO Questions Blooms CO 15. support any of the IT resources due to insufficient infrastructure. If they
could leverage cloud computing technology in their system, suggest a R 1
1. State the differences from synchronous and asynchronous
suitable cloud type with proper justification. List the characteristic of cloud
communication along with the buffering strategy adapted in R 1
computing. (13)
both..
2. OR
List the role of shared memory systems. U 1
3. b) Explain the different cloud services and the platform that support these
How do you define the scalar time and the vector time? R 1 services. Give an example for application service adapted by any E 2
4. If the two events ei and e2 of two different processes occur at organization. (13)
same time, independently. What kind of relationship exist R 1
between ei and ez? PART C (1×15=15 MARKS)
5. What are the various deadlock detection in distributed systems?
U 1 a) Consider an ABC IT company wanted to provide services like scientific
State a common factor in detecting the deadlock.
6. How beneficial is the Chandy-Misra-Haas algorithm in the AND converter, data converter, currency converter and some of the business
A 2 logic as a server side component to the developer to tailor make the
model and OR model? AP 2
7. What is a checkpoint in the recovery system? How is it useful? E 2 application. Explain the various adaptable technologies to implement in an
distributed environment. State its merit and demerits. (15)
8. State the issues in failure recovery. State the means to identify the
R 2 OR
failure at an early stage. 16
9. What is virtualization? Why is it required in the larger An organization has planned to implement a client module that emulates a
U 2
organization? conventional file system interface for application programs, and server
10. State the relation of compute service with storage service in a modules, that perform operations for clients on directories and on files.
U 2
cloud environment. State the best distributed architecture to deploy and deliver the system. Also
PART B (5×13=65 MARKS) explain the suitable system model to avoid failures and adapt a recovery
a) Explain message passing systems and discuss on the message system for the same in case of unavoidable failures. A 1
oriented middleware and its types. Also explain their functionality in (15)
11. U 1
distributed computing.
(13)
OR
b) Analyze the concepts of heterogeneity, openness, security, scalability
impact of the distributed systems. How the standardization of them is make R- Remembering U-Understanding, Ap- Applying, A- Analyzing, E- Evaluating, C- Creating
R 1
them effective? (13)
a) Give a real time scenario where FIFO message queue is used. Write
and describe the snapshot algorithms for FIFO channels. (13) A 1
12.
OR
b) Describe the physical clock synchronization and logical clock
synchronization and explain the framework of a system of logical Ap 1 STAFF INCHARGE HOD PRINCIPAL
clock. (13)
