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Pune University - Sem - II : Unix Internals, April 2010

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Total No. of Questions :5] [Total No. of Pages : 4 P1062 [3733]-202 M.Sc. - I COMPUTER SCIENCE CS - 202 : Unix Internals (2005 Pattern (Old) & 2008 Pattern (New)) (Sem. - II) Time :3Hours] [Max. Marks : 80 Instructions to the candidates: 1) All questions are compulsory. 2) All questions carry equal marks. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Assume suitable data, if necessary. Q1) Attempt all of the following : [ 8 2 = 16] a) What is callout table? What is its usage? b) What is inode reference count? What do you mean by inode reference count = 0 and inode reference count > 0? c) Define context of a process. d) Which system calls can be used in following situations? Give and explain its syntax. i) When a user wants to change a current directory of a process. ii) If a user wants to simulate the usual file system hierarchy and run processes there. e) What is signal? What do you mean by following? Signal (SIGINT, sigcatcher). f) Discuss the cases in which a process can incur protection fault. g) Give any four functions of line discipline. h) Justify. A buffer cannot be on both hash queue and on free list at the same time. P.T.O.

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Additional Info : M.Sc. COMPUTER SCIENCE, CS - 202: Unix Internals ( 2008 Pattern (New) & 2005 Pattern (Old) Course)) (Semister - II), Pune University
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