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[Spring 2015] ASSIGNMENT
PROGRAM BSc IT
SEMESTER SECOND
SUBJECT CODE & NAME BT0070,
Operating Systems
CREDIT
4 BK ID B0954 MAX. MARKS 60
Q1. Write short notes on:
1.
Process Creation
2.
Terminating Process 5+5= 10
Answer:
1.
Process
Creation
During the course of execution, a process may create
several new proceses using a create-process system call. The creating process
is called a parent process and the new processes are called the children of
that process. Each of these new processes may in turn create other processes,
forming a tree of processes.
A process in general needs certain resources (CPU
time, memory, I/O devices) to accomplish its task. When a
2. Write short notes on:
1. Critical section problem
2. Buffering 5+5 10
Answer:
1. The critical-section problem
A
critical-section is a part of program that accesses a shared resource
(data structure or device) that must not be concurrently accessed by more than
one process of execution. Consider a system
3 What are TLBs? Why they are
required in paging? 3+7 10
Answer:
A
translation lookaside buffer (TLB) is a cache that memory management hardware
uses to improve virtual address translation speed. The majority of desktop,
laptop, and server processors includes
4. Describe the techniques of free
space management of free space list. 10 10
Answer:
The
disk is a scarce resource. Also disk space can be reused. Free space present on
the disk is maintained by the operating system. Physical blocks that are free
are listed in a free-space list. When a
5 What are computer viruses? How do
they affect our system? 3+7 10
Answer:
A
computer virus is written with an intention of infecting other programs. It isa
part of a program that
6. List and explain the types of
multiprocessor OS.
Answer:
Three basic types of multiprocessor operating systems
are:
·
Master / slave
·
Symmetric
Separate supervisors
In
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