Dr. A.P.J. Abdul Kalam University MCA I SEM (Second Year) Operating System and Architecture [MCA103] Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Computer Application

First Semester Main Examination, Dec-2020

Operating System and Architecture [MCA103]

Time: 3:00 Hrs Max Marks 70

Note : Attempt any five questions.

All question carry equal marks.

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

system.

(b)What is thread and what are the differences between user-level threads and

kernel supported threads?

Q.2 (a) Explain different types of schedules along with the purpose of each.

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

Q.3 (a) Briefly explains the following: i) Mutual exclusion ii) Critical section

problem

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

Occur?

Q.4 (a) Define Distributed Shared Memory.

 (b) Write in brief about DMA.

Q.5 (a) What is meant by thrashing? Explain various causes of thrashing.

 (b) Differentiate between external and internal fragmentation.

Q.6 (a) Differentiate among the following:

 (i) Physical address and logical address

 (ii) Paging and segmentation

(b) What is paging? Explain Paging Principle. How is it different from

Segmentation?

Q.7 (a) Define spooling and for it explain its working with necessary diagram?

(b) Discuss various security threats in file system of OS. What is

fragmentation? Why it is needed? Explain differences between

external and internal fragmentation.

Q.8 Write short note on the following:

 (i) Turnaround Time

 (ii) Process management in LINUX

 (iii) Key feature of windows

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