Dr.A.P.J.Abdul Kalam University BE V SEM ALL BRANCH Operating System [CS-502] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University

Bachelor of Engineering

Fifth Semester Examination, December 2020

Operating System [CS-502]

Branch-CS

Time: 3:00 Hrs Max Marks 70

Note: (i) Attempt any five questions.

(ii) Answer should be precise & to be point only.

(iii) Assume suitable data if necessary & state them clearly.

Q.1 (a) What is operating system? Explain briefly about various types of operating system.

(b) Difference between -

i. Multitasking and Multi programming operating system

ii. Real time and time sharing operating system.

Q.2 (a) What is thread and what are the differences between user-level threads and kernel

supported threads?

(b) Define spooling and for it explain its working with necessary diagram?

Q.3 (a) Discuss various free space management techniques. Explain them in detail with their

advantages and disadvantages.

(b) What is distributed operating system? Discuss its types along with, design issues?

Q.4 (a) Explain different types of schedules along with the purpose of each.

(b) Write short notes:

i) Distributed shared memory

ii) Process management in LINUX

Q.5 (a) Discuss various security threats in file system of OS. What is fragmentation? Why

it is needed?

(b) Write a Semaphore solution for dining philosopher's problem

Q.6 (a) Differentiate among the following:

i) Physical address and logical address

ii) Paging and segmentation

(b) What is Deadlock? What are the four necessary conditions for a deadlock occur?

Q.7 Write short notes on the following (any 3)

i) Worms and viruses

ii) Key features of windows file system

iii) Parallel operating system

iv) RPC

Q.8 (a) Briefly explain the following:

i) Mutual exclusion

ii) Critical section problem

(b) What is meant by thrashing? Explain various causes of thrashing

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