OS Unit-1 Types of AWSM packages and code script awsm1c2.pptxOS.pdf

AWSM packages and code script awsm1c2.pptxAWSM packages and code script awsm1c2.pptxAWSM packages and code script awsm1c2.pptxAWSM packages and code script awsm1c2.pptx

1. Shri Vaishnav Vidyapeeth Vishwavidyalaya, Indore (M.P.)
Shri Vaishnav Institute of Information Technology
Department of Computer Science and Engineering
Lecture
on
“Operating System Types”
.
Prepared By
Virendra Dani

2. Types of OS
❑AnOperatingSystem(OS)isasoftwarethatactsasan
interfacebetweencomputerhardwarecomponentsand
theuser.Everycomputersystemmusthaveatleast
oneoperatingsystemtorunotherprograms.
ApplicationslikeBrowsers,MSOffice,Notepad
Games,etc.,needsomeenvironmenttorunand
performitstasks.

3. OS Generation
I.TheFirstGeneration(1945toearly1955s)
II.TheSecondGeneration(1955-1965)
III.TheThirdGeneration(1965-1980)
IV.TheFourthGeneration(1980-PresentDay).

4. OS Generation

5. OS Generation

6. Types of OS
1)BatchOperatingSystem
2)MultiprogrammingOperatingSystem
3)MultitaskingOperatingSystem
4)RealTimeOperatingSystem
5)Time-SharingOperatingSystem
6)DistributedOperatingSystem
7)NetworkOperatingSystem
8)EmbeddedOperatingSystem

7. Batch Operating System
❑BatchOperatingSystem
❑Nodirectinteractionbetweenuserandthecomputer.
❑Eachuserprepareshisjobonanoff-linedevicelike
punchcardsandsubmitsittothecomputeroperator.
❑Tospeedupprocessing,jobswithsimilarneedsare
batchedtogetherandrunasagroup

8. Batch Operating System
❑BatchOperatingSystem

9. Batch Operating System
❑TheproblemswithBatchSystemsareasfollows−
➢Lackofinteractionbetweentheuserandthejob.
➢CPUisoftenidle,becausethespeedofthemechanical
I/OdevicesisslowerthantheCPU.
➢Difficulttoprovidethedesiredpriority.

10. Multiprogramming Operating System
❑Multiprogrammingisanextensiontobatchprocessing
wheretheCPUisalwayskeptbusy.
❑Eachprocessneedstwotypesofsystemtime:CPU
timeandIOtime.
❑Inamultiprogrammingenvironment,whenaprocess
doesitsI/O,TheCPUcanstarttheexecutionofother
processes.Therefore,multiprogrammingimprovesthe
efficiencyofthesystem.
❑Ifseveraljobsarereadytorunatthesametime,then
thesystemchooseswhichonetorunthroughthe
processofCPUScheduling.

11. Multiprogramming Operating System

12. Multitasking Operating System
❑Themultitaskingoperatingsystemisalogical
extensionofamultiprogrammingsystemthat
enablesmultipleprogramssimultaneously.
❑Itisallowingausertoperformmorethanone
computertaskatatime
❑Itallowsausertoperformmorethanonecomputer
taskatthesametime.
❑WhenyouopenyourWebbrowserandthen
openWordatthesametime,youarecausingthe
operatingsystemtodomultitasking.

13. Multitasking Operating System

14. Real Time Operating System
❑InReal-TimeSystems,eachjobcarriesacertain
deadlinewithinwhichthejobissupposedtobe
completed,otherwise,thehugelosswillbethere,or
eveniftheresultisproduced,itwillbecompletely
useless.
❑Thetimetakenbythesystemtorespondtoaninput
anddisplayofrequiredupdatedinformationistermed
astheresponsetime.
❑Areal-timeoperatingsystemmusthavewell-defined,
fixedtimeconstraints,otherwisethesystemwillfail.

15. Real Time Operating System

16. Real Time Operating System
❑Therearetwotypesofreal-timeoperatingsystems.
➢Hardreal-timesystems
➢Softreal-timesystems

17. Time-Sharing Operating System
❑Time-sharingisatechniquewhichenablesmany
people,locatedatvariousterminals,touseaparticular
computersystematthesametime.
❑Time-sharingormultitaskingisalogicalextensionof
multiprogramming.
❑Processor'stimewhichissharedamongmultipleusers
simultaneouslyistermedastime-sharing.
❑Atime-sharingoperatingsystemallowsmanyusersto
beservedsimultaneously,sosophisticatedCPU
schedulingschemesandInput/outputmanagementare
required

18. Time-Sharing Operating System
❑ThemaindifferencebetweenMultiprogrammedBatch
SystemsandTime-SharingSystemsisthatincaseof
Multiprogrammedbatchsystems,theobjectiveisto
maximizeprocessoruse,whereasinTime-Sharing
Systems,theobjectiveistominimizeresponsetime.
❑Thetime-sharingoperatingsystemprovideseffective
utilizationandsharingofresources.
❑ThissystemreducesCPUidleandresponsetime.

19. Distributed Operating System
❑Distributedsystemsusemultiplecentralprocessorsto
servemultiplereal-timeapplicationsandmultiple
users.
❑TheDistributedOperatingsystemisnotinstalledona
singlemachine,itisdividedintoparts,andtheseparts
areloadedondifferentmachines.
❑Theprocessorscommunicatewithoneanotherthrough
variouscommunicationlines(suchashigh-speed
busesortelephonelines).
❑Processorsinadistributedsystemmayvaryinsize
andfunction.Theseprocessorsarereferredassites,
nodes,computers,andsoon

20. Multitasking Operating System

21. Network Operating System
❑ANetworkOperatingSystemrunsonaserverand
providestheserverthecapabilitytomanagedata,
users,groups,security,applications,andother
networkingfunctions.
❑Theprimarypurposeofthenetworkoperatingsystem
istoallowsharedfileandprinteraccessamong
multiplecomputersinanetwork,typicallyalocalarea
network(LAN),aprivatenetworkortoother
networks.

22. Network Operating System

23. Embedded Operating System
❑Anembeddedoperatingsystemisacomputer
operatingsystemdesignedforuseinembedded
computersystem.
❑Theseoperatingsystemsaredesignedtobesmall,
resource-efficient,dependable,andreducemany
featuresthataren'trequiredbyspecialized
applications.
❑Embeddedhardwaresystemsaretypicallyquite
specific,anditmeansthatthesesystemsaredesigned
tocovercertaintasksduetolimitedresources.

24. Network Operating System

25. Thank -You