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2003 Course Computer Techniques & Applications

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Total No. of Questions : 12] [Total No. of Pages : 3 [3764]-290 P1439 B.E. (Instrumentation & Control) COMPUTER TECHNIQUES AND APPLICATIONS (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to candidates : 1) Answer any 3 questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) Four processes (P1, P 2, P 3, P 4) arrive at time 0, 2, 4, 5 with their CPU bursts of 7, 4, 1 and 4 respectively. For each of the following CPU scheduling algorithms, draw the Gantt chart and determine the average turn around time and average waiting time, showing all the calculations in detail. [12] i) First Come First Serve (FCFS). ii) Shortest Job First (SJF) (non preemptive). iii) Shortest Job First (SJF) (preemptive). iv) Round Robin (RR) with a time quantum of 4 CPU bursts. b) With neat diagrams explain the following Disk scheduling algorithms.[6] i) SCAN. ii) C-SCAN. iii) C-LOOK. OR Q2) a) b) Explain the different types of Operating Systems (any four): [8] Explain the following with respect to process management: [10] i) Job Queue. iii) Ready Queue. v) ii) Device Queue. iv) Mid term scheduler. Context Switch. P.T.O.

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