Q.1: What is a multitasking operating
system?
Ans: Any system that is capable of running
more than one program at a same time is called multitasking operating system.
Q.2: If you have a PC, identify some
situation in which you can take advantage of its multitasking capabilities
Ans: If one process crashes, it will not
affect the other running program due to multitasking OS. For example, If we are
in the middle of writing a paper in a word processing program and our Web
browser Unexpectedly quits, we don’t lose our work.
Q.3: What is the role of the user
interface of an operating system?
Ans: User interface OS play role of
interaction between the user (human) and the machine.
Q.4: Define the term “process”?
Ans: The activity of executing a program under the
control of the operating system is known as a process.
Q.5: What is difference between
virtual memory and main memory?
Main Memory
|
Virtual Memory
|
1- Main memory, also called RAM, is the physical memory
unit in the computer.
2- Computers use
as much main memory as possible when storing data to be accessed by the processor.
|
Virtual memory also serves as computer memory, but
is actually hard drive space acting as temporary storage for computer
processes.
virtual memory space set aside on the
hard drive.
|
Q.6: Write down the steps of booting
process?
i.
The power supply performs a self test
ii.
The microprocessor timer chip receives the “Power Good” signal
iii.
The CPU starts the ROM BIOS code
iv.
The BIOS searches for adapter
v.
The ROM BIOS checks to see if this is a cold boot or a warm boot
vi.
Power on self test
vii.
The BIOS locates and reads the configuration info stored in CMOS
viii.
Shadow RAM
Q.7: Difference between hardware and
software?
Ans:
Hardware
|
Software
|
Computer hardware is any physical device used in or
with your machine.
e.g. monitor, mouse etc.
we can touch, see and feel hardware.
Hardware is constructed using physical material or
components.
User cannot make new duplicate copies of the
hardware.
Hardware cannot be transferred from one place to
another electronically through network.
Hardware is not affected by computer viruses.
Hardware operates under control of software.
If hardware is damaged, it is replaced with new one.
|
Software is a
collection of code installed onto your computers.
e.g. internet
browser, operating system etc.
You can not
touch and feel.
Developed by
writing instructions in programming lang.
User can make
many new duplicate copies of the software.
It transferred
electronically through network.
It is
affected by computer viruses.
The operation
of comp are controlled through software.
If it is
damaged or corrupted , its backup copy can be reinstalled.
|
Q.8: Explain the hardware devices
with example. 1) Input 2) Output 3) Storage 4) Communication
Ans: Input Devices:
The devices
that send data or instructions into a computer, allowing you to interact with
and control he computer are called input devices e.g. keyboard, mouse, Digital
camera, Microphone, Card reader etc.
Output Devices:
An output device
is any peripheral that receives data from a computer, usually for display,
projection, or physical reproduction e.g. Printer, Monitor, Headphone,
Projector, Speakers etc.
Storage Devices:
A storage device is
any hardware capable of holding information either temporarily or permanently
e.g. Memory Card, SSD, Flash drive, Hard drive, Floppy diskette, Blu-Ray disk
etc.
Communication Devices:
A hardware devices capable of transmitting an analog or
digital signal over the telephone, other communication wire, or wirelessly are
called communication devices e.g. Bluetooth devices , Modem, Wi-Fi devices etc.
Q.9: Explain who is the brain of the
computer?
Ans: The CPU is the brain of computer
where most calculations take place. Everything you do on your computer must
first be processed by your processor. The CPU does not remember things. Our
Hard drive and RAM are the ones doing all the remembering. Using brain
terminology, Our CPU does thinking, and your hard drive remembering.
Q.10: Difference between browsers and
operating system? Explain them with example.
Ans: Operating System:
An operating
system is the software that makes the basic functions of your computer
possible. E.g. Mac OS X, Windows etc.
Browser:
A browser is the
program you use to access the internet and view websites. e.g. Internet
Explorer, Firefox, Chrome etc.
Q.11: Explain the two parts of ALU
(Arithmetic Logic Unit)?
An arithmetic
logic unit (ALU) is a digital circuit used to perform arithmetic and logic
operations. It represents the fundamental building block of the central
processing unit (CPU) of a computer.
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