Operating System Question Paper

Operating System

Course:Higher Diploma In Information Technology

Institution: Inoorero University question papers

Exam Year:2012

operating system.

1.(a)Define the term Operating System (1marks)
(b)State and explain three objectives of an Operating System (6marks)
(c)State and explain the five services provided by operating system to the Convenience of the users (10marks)
(d)Define the following terms as used in the Operating system (4marks)
-kernel
-multiprogramming

2.(a)Define the following terms as used in process management (2marks)
-process control block
-process scheduling
(b)Differentiate between Turn Around Time and Response Time (2marks)

(c)A process goes through a series of discrete process states.List the five states.
(3marks)
(d)Consider the following set of process with the length of CPU burst given in milliseconds.
Process Burst time
P1 12
p2 3
p3 5
p4 2
p5 6
Assume process arrive in the order P1,P2,P3,P4,P5 all at time 0.
1.Draw three Gantt illustrating the execution of these processes using FCFS, preemptive),SJF(non preemptive) and RR quantum=1. (6marks)

2.Complete the turnaround time (TT) of each process for each of the alogarithms in (1)above (3marks)
3.compute the waiting time for each job in the 3 alogarithms. (3marks)

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