Download JNTUH MCA 2nd Sem R09 2017 August F3202 Operating Systems Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 2nd Sem (Second Semester) Regulation-R092017 August F3202 Operating Systems Previous Question Paper

R09

Code No: F3202















JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA II Semester Examinations, August - 2017

OPERATING SYSTEMS

Time: 3hrs











Max.Marks:60

Answer any five questions

All questions carry equal marks

- - -



1.a)

Define Batch operating system and time sharing operating system, giving the essential
properties of each of them.

b)

List and explain various layers of an operating system.







[6+6]


2.a)

Distinguish between user mode and kernel mode of operations in operating systems.

b)

List the difference between preemptive and non-preemptive scheduling.

[6+6]


3.a)

State the requirements that a solution to the critical section problem must satisfy.

b)

What are the different principles which must be considered while selection of a scheduling
algorithm?



















[6+6]


4.

Why should page replacement be performed? Compare FIFO, Optimal and LRU page
replacement algorithms with an example.











[12]


5.a)

What is segmentation? How it differ from paging?

b)

What is disk scheduling? Give SCAN disk scheduling algorithm.



[6+6]


6.

List and briefly discuss the most common schemes for defining the logical structure of a
directory.



















[12]


7.

How does deadlock avoidance differ from deadlock prevention? Write about deadlock
avoidance algorithm in detail.













[12]


8.a)

Why protection is required for a system? Explain the principles of protection.

b)

Illustrate the design principles of UNIX system.









[6+6]




--ooOoo--