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RTOS Module 1 Q and A

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RTOS S7 ECE kerala university
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  08.705 RTOS (EL-III) Module 1 University Questions and Solutions  Part A Questions and Solutions 1.WhatarethefunctionsofanOS?(Nov.2012)Ans:Thebasicfunctionsofanoperatingsystem: ã OSprovideservicestoprogramsandtousersofthoseprograms.Itprovideenvironmentfortheexecutionof programs. ã Thecommonfunctionsare:1.Programexecution:Loadstheprogramintomemoryandexecutestheprogram.Alsoenditsexecutionnormallyorabnormally.2.I/Ooperation:OpenorcloseanyI/Odeviceoranyfile.3.Filesystemmanagement:Readafileorwriteafile.4.Communications:Sharethedatabetweendifferentprocesses.5.Errordetection:Todetectandmakeappropriateactiontocorrecttheerrorsforconsistentcomputing.  2. What are the benefits of a multiuser OS as against a single user OS? (Nov. 2012)Ans: Advantages of multi-user OS:-1.As the OS is handling multiple application at a time most of the CPU time is efficiently using .2.Resources like memory, CPU are utilizing at the maximum . 3. Multiple users can use a system at a time.4.Networked, distributed system can be implemented.  3.Describehowaresystemcallsusedwhileafileiscopiedfromasourcelocationtodestinationlocation?(Oct.2011)Ans: System call: ã Provides an interface to the OS services. ã Available as routines written in C and C++, also certain low-level tasks may be in assembly language instructions. ã Types of system calls:1. Process control2. File manipulation3. Device manipulation4. Information maintenance5. Communication6. Protection

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Jul 23, 2017
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