Exam Papers

Operating System 2018 – BSc Computer Science Part 2 (MJPRU)

Paper code: 13513
1513
B.Sc. (Computer Science) (Part 2)
Examination, 2018
Paper No. 2.1
OPERATING SYSTEM

Time: Three Hours] [Maximum Marks: 33

 

Note: Attempt five questions in all. Attempt one question from each unit.

Unit-I

1. (a) What are the services provided by the operating system ? Describe each of them in brief.

    (b) What is file ? Describe allocation methods of a file.

2. (a) There is a total memory of 64M in the system, and the total memory is equally divided in 8 parts of 8M each. The request process are 1M, 2M, 3M, 4M, 5m< 6M, 7M, 9M. Calculate :

         (i) Internal Fragmentation

        (ii) External Fragmentation

    (b) Explain the following :

         (i) Real-Time System

         (ii) Multitasking

         (iii) Distributed System

Unit-II

3. Describe page replacement algorithm. Find out total no. of page fault in the sequence with :

    (a) FIFO

    (b) LRU

    (c) Optimal

< 7, 0, 1, 2, 3, 4, 7, 0, 1, 2, 3, 4, 5, 7, 0, 1, 2, 3, 4, 5, 6 >

4. What is Segmentation ? Describe fragmentation with diagram and also define internal and external fragmentation.

Unit-III

5. Current situation of system is :

ProcessAllocationMaxAvailable
 A    B    CA     B     CA     B     C
P07     0     08     0     17     0     3
P12     0     03     0    2 
P20     0     32     2     0 
P35     4     34     4     4 

Find out :

(a) Need table

(b) Safe-Sequence and Intermediate Process request for process P3 (0, 2, 2).

6. What is CPU Scheduling ? Explain in brief with suitable example and diagrams.

Unit-IV

7. (a) What is PCB ? Explain its working.

    (b) Explain Memory Management Schemes in brief.

8. (a) What is Deadlock ? What are the prevention schemes of deadlock ?

    (b) Explain in brief :

         (i) Access Matrix

         (ii) Dynamic Protection Structure

         (iii) Resource Protection Policies

Unit-V

9. (a) What are applications and characteristics of windows NT ? Explain its installation scheme.

    (b) What is standalone server ? Explain its utility.

10. (a) Differentiate PDC and BDC in details with examples.

      (b) Write short notes on any three of the following :

           (i) Dhep

           (ii) Wns

           (iii) Web Server

           (iv) Router

……..End……..

Lokesh Kumar

Being EASTER SCIENCE's founder, Lokesh Kumar wants to share his knowledge and ideas. His motive is "We assist you to choose the best", He believes in different thinking.

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