Exercise

Set - 1

Question 6 :

Multitasking ?

Answer :

An Operating system that is capable of allowing multiple software processes to run at the same time. Below are some examples of multitasking Operating Systems.

Unix
Windows 2000
Windows XP
Mac OS X


Question 7 :

Multithreading ?

Answer :

Operating systems that allow different parts of a software program to run concurrently. Operating systems that would fall into this category are:

Linux
Unix
Windows 2000
Windows XP
Mac OS X


Question 8 :

What are the basic functions of an operating system?

Answer :

Operating system controls and coordinates the use of the hardware among the various applications programs for various uses. Operating system acts as resource allocator and manager. Since there are many possibly conflicting requests for resources the operating system must decide which requests are allocated resources to operating the computer system efficiently and fairly. Also operating system is control program which controls the user programs to prevent errors and improper use of the computer. It is especially concerned with the operation and control of I/O devices.


Question 9 :

Why paging is used?

Answer :

Paging is solution to external fragmentation problem which is to permit the logical address space of a process to be noncontiguous, thus allowing a process to be allocating physical memory wherever the latter is available.


Question 10 :

While running DOS on a PC, which command would be used to duplicate the entire diskette?

Answer :

diskcopy