Class 11 ,12 computer science full explanation and notes pdf
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IT is a salware that works as an interface between a user and the computer hardware. The primary objective of an operating systernis to make computer system convenient to use and lo ulilize computer hardware in an cicient manner. The operating system performs the basic tasks such as rebotNotes pdfing input from the keyboard, processing instructions and sending output to the screen
We'll be covering the following topics in this
tutorial:
🔴What is Operating System
🔴Functions of operating system
🔴 Different type of operating system
🔴How Operating System Work
🔴Characteristics of Operating System
What is Operating System
The Sottware is the Non-Touchable Parts of the Computer and Softwares are those which are used for Performing an Operation so That Software are just used for Making an Application but hardware's are those which are used for performing an Operation
Note copy pdf
https://photos.app.goo.gl/ZeiTKJMwFMY9UvYw6Computer note pdf
nerating system software that is required in order to nin application programs .works as a bridge lo perform beller interaction between application programs and laruware of the computer. Examples of operating system are UNIX, MS-DOS, MS-Windows - 98/XP/Vista,
Windows NT/2000, OS/2 and Mac OS
Functions of operating system
Operating System Moans that Rosource Manager, that manage all the Resources those are Attached to the Systein like Memory. Processor, Inpulloutput Devices. Storage Management manage all the Sloving and Acressing Files and Directories
Reading Writing Operations
Operational system anges overall aclivlies of a compuler and the inpuloulpul devices allached to the computer. It is the first software you see when you turn on the computer, and the last software you see when the compuleristumer offllis ile solare al enables all the programs you use. AI is simplest level, an operating system does two things . The first it manage the hardware and software recourse of computer system . These resources include the processor, memory, disk space, etc. The second, il provides a slabe, cursistent way ſor applications loceel with the aware will out having-lukka alu dekis hardware .The frutask is very important le managing the hardware and software resources, as various processes composto cach other for getting the CPU ime and memory space to complete the task in this regard the operating system acts as a manager to allocate the available resources to 'sahisty the require whoThe second task .. providing a consistent application Interface is especially important. A consistent application program interface (API, allows a user for SW developer to win an action program on any computer and an ibis program ter compiler, even if the different types of memory of CPU cr slurage disk. I. shields the use of the machine From Vie low-level Jells Chemische's operation and provides frequenly needed laciles.
Process Management Il manage all the Used Am Piace.
Memory Management Operating System als Manages the Corpuler Memory that is provided to Ure luce Extended Machine. It is belaves like an Extended Machine Le Provides us Sharing of Files between Muluge Users
Mastermind: It performs Many Functions sats why we can cay that Operatng System is
Differen types of operating system
There are different type of Operating system foee are organized by their working
Serial Processing: In Scral Processing operating system that use FIFO (Fist in First oft) technique
for processing the process
Multi-Programming: In Nulli programming Ouersing
System Multiple Programs
are Execuled on
Batch Processing. Inbal processing a simlar type of jobs prepared and processed.
the System at a Timo
Real Time System: Rame System are used the Hoqureshiger and Timely Response
Distributed Operating System: In this craing system Data is stored and Frocessed on M. Hile Locations
Multiprocessing: In this type of oocrating system there are two ar Mors CPU in a single OS
Paralel operating systems angepaald alcuning resources of the compuler salon.
How Oporating System Work
Wilier you luin on le cunipuler, te uperady vysler program is ugueu role in Tery. This
programs called the kanel. Once Initialized the system program is prepared to run the user
programs and permits them to use the hartwars cicienty Windows SerXP is an excellent example
to supports de types of Hardware configurations from thousands ock and
accommodates thousands of different v devices like printers, disk drives, scanners and cameres.
Onerating systems may be classted based on it multiple tasks can be partament simultaneously
aid if the sys.com can be used by mudipeuses. It can lead sings muli-. OS
and single lasking or muli-tasking OS.A multi-user System must be muls-lasking. MS-DOS and
Windows 3x are examples of side user operating system. Whereas JNIX is an example of mill-
LEHnd muldking operating sylwn
For Example if we want to Port Some Paimings on the Sonce then we must use the Application
Software as Paint and Hanwan na a Mouse for ring an Object Bur how the System Knys what
tado when M Meves en Pecican and When the sad Dwa Line on the Balth
Onerating System is Nocessary which Interact between or wish Communicates with the Hardware
and the Software For Better understanding you can so the Working at the Operating System
Charactenstics of Operating System
11 Operating System is a collection of Programs those are Responsible for the Execution of other
Programa
zi Onerating Systems that which Responsible is for Contraling all the input and Output Dedos
me are innocid to the System
31 Operating System is that which Responeble is for Running al die Application Software's.
41 Operating System is that which Pruvides Scheduling to the various Processes Means Allocales
the Memory to varouc Prococcthaco Wants to Excoute.
51 Operating System is the which provides the Cormu'ication between the user and the Systerit.
Bj Operaing System is Sored nl ne JS Means in the Basic Inpul and Oulpul System means
ween a ser Starts His System than this wil Read all the instructions those are Nossary for
Execuring the System Mens running the Operating System Operating System Must be loaded
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