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1、UnixInternals(April/May-2012,Set-1)JNTU-AnantapurS.1CodeNo.:9A05602/R09Set-1B.Tech.IIIYearIISemesterRegularExaminationsApril/May-2012SolutionsUNIXINTERNALS(ComputerScienceandEngineering)Time:3HoursMax.Marks:70AnsweranyFIVEQuestionsAllQuestionscarryequalmarks---1.(a)Dr
2、awandexplainthearchitectureofUNIXsystems.(Unit-I,TopicNo.1.5.1)(b)Discussindetailthesleepandwakeupprocedures.(Unit-V,TopicNo.5.6)2.(a)Ifseveralprocessescontendforabuffer,thekernelguaranteesthatnoneofthemsleepforever,butitdoesnotguaranteethataprocesswillnotbestarvedout
3、fromuseofabuffer.Redesigngetblksothataprocessisguaranteedeventualuseofabuffer.(Unit-II,TopicNo.2.2)(b)Whataretheadvantagesofbuffercache?(Unit-II,TopicNo.2.5)3.(a)Givebriefdescriptionabouttheaccessingofinodes.(Unit-III,TopicNo.3.1)(b)Explainindetailthecontinuousfileall
4、ocationsystem.(Unit-III,TopicNo.3.7)4.(a)Whatisthepurposeoflinksystemcall?Writeandexplainthealgorithmforthesame.(Unit-IV,TopicNo.4.12)(b)Writeshortnotesonmaintenanceofthefilesystem.(Unit-IV,TopicNo.4.15)5.(a)Whatareregions?Explaintheirroleinthecreationofprocesses.(Uni
5、t-V,TopicNo.5.2)(b)Describeindetailaboutthecontextofaprocess.(Unit-V,TopicNo.5.3)6.(a)Explainthesecurityproblemsthatexistsifasetuidprogramisnotwriteprotected.(Unit-VI,TopicNo.6.6)(b)Writeaprogramthataparentandchildsharesafileaccess.(Unit-VI,TopicNo.6.1)7.(a)Discussind
6、etailabouttheschedulingparameters.(Unit-VII,TopicNo.7.1)(b)Whatisprofiling?Explainitindetail.(Unit-VII,TopicNo.7.3)8.(a)Explainclistsindetail.(Unit-VIII,TopicNo.8.3)(b)Writeaprogramforreadingdatafromriskbyusingblockandrawinterfaces.(Unit-VIII,TopicNo.8.3)B.Tech.III-Ye
7、arII-Sem.(JNTU-Anantapur)S.2SpectrumALL-IN-ONEJournalforEngineeringStudents,2013SOLUTIONSTOAPRIL/MAY-2012,SET-1,QPQ1.(a)Drawandexplainthearchitectureof(b)ExplainindetailthecontinuousfileUNIXsystems.allocationsystem.Answer:April/May-12,Set-1,Q1(a)Answer:April/May-12,Se
8、t-1,Q3(b)ForanswerreferUnit-I,Q10.Note:Ingivenquestion,thewordcontiguousismisprinted(b)Discussindetailthesleepandwakeupascon
