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Operating system mid term model paper for bs exam?

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Paper: Operating System
Time: One hour(60minutes)
Marks: Twenty(20)

Section"A"
Q1:Fill in the blanks. (4)

1._________is the set of programs that controls a computer.
2.A________is only one instant of a program in execution.
3.The process has finished execution is called_________state.
4._____________OS is used to execute more than one jobs simultaneously
by a single processor.

Q2:Write short answers for the given questions. (6)
1)What do you know about process scheduling?
2)What are the similarities between thread and process?
3)What is context switching?


Section"B"

Q2:Write long answers for the given questions.(10)
Q3:Explain different services of an operating system? (10)
Q4:Find Average waiting time and also draw the Gantt chart by using
SJF(non-preemptive) algorithm method?


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