Department Of Computer Science & engineering  And IT
Class : CSE V & IT
Subject: Principals Of Operating Systems

Tutorial Sheet –6

Q1   What is layered architecture for the file system?

Q2  Differentiate between various file allocation methods

Q3  What are Acyclic _Graph Directories.

Q4  Write merits and Demerits of following Directories

Q5   Suppose that a disk drive has 5000 cylinders, numbered 0 to 4999-Tbe drive is currently serving a request at cylinder 143, and the previous request was at cylinder 125.The queue of pending requests, in FIFO order is 86,1470,913,1774,948,1509,1022,1750,130
a) FIFO
b) SSTF
c) SCAN
d) LOOK
e) C-SCAN
f) C-LOOK

Q6  Explain various techniques for free space management?
a) One level Directory
b) Two level Directory

Q7  Why is rotational latency usually is not considered in disk scheduling

Q8.  Explain the  following : ( B.E.,May-2000 )
a) Attributes of a file
b) File Access methods