Register No.
SNS COLLEGE OF ENGINEERING
Kurumbapalayam(Po), Coimbatore – 641 107
Accredited by NAAC-UGC with ‘A’ Grade
Approved by AICTE & Affiliated to Anna University, Chennai
INTERNAL ASSESMENT EXAMINATION - III
COURSE: B.E – EEE
CS2411 – OPERATING SYSTEM
Class: IV Sem EEE
Duration: 3 Hours
Date: 08 October 2015
Maximum: 100 Marks
Answer ALL questions
1.
List the various essential requirements for long term information storage?
2
2.
Define seek time and latency time.
2
3.
Discriminate How free-space is managed using bit vector implementation.
2
Predict is the maximum size of disk which contains following parameters?
2
4.
Cylinder=1024, heads=16 and sector per track is 63.
5.
State the functions of file organization module in file systems.
2
6.
Illustrate the reason for not considering the rotational latency disk scheduling?
2
7.
State about daisy chain?
2
8.
Indicate the importance of swap space management.
2
9.
List the pros and cons of sector sparing and sector slipping?
2
10.
Classify the services provided by kernel I/O subsystems.
2
PART B - (3 X 12 = 36 marks)
11.
12.
(a)
(i)
(b)
(i)
(a)
(i)
(b)
13.
(a)
Summarize a detailed note on various file access methods with neat sketch
OR
Describe briefly about file attributes, operations, types and structure.
16
16
Discuss in detail about file allocation methods.
OR
(i) Explain the following: Issues in designing a file system.
(ii) Free space Management
(iii) File Protection
16
(i)
8
Demonstrate that how file system is implemented in windows XP.
(ii) Examine how file system management is done in Linux.
8
4
4
8
OR
(b)
(i) Write a brief note on the steps involved in DMA transfer.
(ii) Explain the data structures supported by kernel I/O subsystem
8
8
14.
(a)
Suppose that a disk drive has 5000 cylinders. The drive is currently serving a request at
cylinder 143 and the previous request was at cylinder 125. The queue of pending
request is: 86, 1470, 913, 1774, 948, 1509, 1022, 1750, 130. What is the distance to
satisfy these requests using the following scheduling algorithms?
FCFS, SSTF, SCAN, C-SCAN, LOOK, C-LOOK
8
(ii) Review about tertiary storage devices.
OR
(i) Classify and assess the various types of I/O buffering schemes.
(ii) Associate the disk performance parameters.
8
(a)
(i)
16
(b)
(i)
(b)
15.
(i)
Criticize the important concepts of application I/O interface
OR
Determine the different levels of RAID
*****
8
8
16