Download AKTU B-Tech 8th Sem 2016-17 NCS082 Real Time System Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2016-17 NCS082 Real Time System Question Paper

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B. TECH.
THEORY EXAMINATION (SEM?VIII) 2016-17
REAL TIME SYSTEM
Max. Marks : 100
Note : Be precise in your answer. In case Ofnumerical problem assume data wherever not provided.
1. Attempt all parts of the following questions:
(a)
(b)
(e)
(d)
(e)
(f)
(g)
(h)
(i)
(i)
2. Attempt any five of the following questions:
(a)
(b)
(e)
(d)
(e)
(f)
(g)
(h)
SECTION ? A
10 X 2 = 20
What do you mean by a real?time system?
Discuss issues in real?time system scenario.
What is an Embedded system? Differentiate between embedded system and real?time
system.
Define TargetOS.
Compare open system compare with a close system?
What is the hard and soft
communication supported by a network
difference between real-time
Distinguish traffic shaping and policing.
What is meant by QOS routing?
Are all hard real-time systems usually are safety-critical in nature?
Scheduling decisions are made only at the arrival and completion of tasks in a non-pre
emptive event-driven task scheduler. J ustify your answer.
SECTION ? B
5 X 10 = 50
What is the difference between a performance constraint and a behavioral constraint in
real-time system?
Can we consider EDF as a dynamic priority scheduling algorithm for real-time tasks?
A real-time system consists of three tasks T1, T2, and
T3.Their characteristics have been shown in the following table.
Task
Phase (ms)
Execution
Time (ms)
Relative
Deadhne
(m5)
Period (ms)
T1
20
10
20
20
T2
40
10
50
50
T3
70
20
80
80
Suppose the tasks are to be scheduled using a table-driven scheduler. Compute the
length of time for which the schedules have to be stored in the precomputed schedule
table of the scheduler.
Why are which
multiprocessors not satisfactory to schedule real-time tasks on distributed systems?
What are the drawbacks in using Unix kernel for developing real-time applications?
How does dynamically changing the priority levels of tasks property affect real-time
systems?
Discuss which category of concurrency protocol is best suited under what
r?Irr?nmcfanr?F-r)
Traditional 2PL protochrgv?gbl?egoEW in real-time databases. Why?
algorithms can satisfactorily schedule real-time task on

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SECTION ? C
Attempt any two of the following questions: 2 x 15 = 30
What are the distinguishing characteristics of periodic, aperiodi, and sporadic real-time tasks?
What is it required to synchronize the clocks in a distributed real-time system? Compare
the advantages and disadvantages of centralized and the distributed clock synchronization.
What is the difference between synchronous and asynchronous
I/O? Which one is better suited for use in real-time applications?
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