DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE
Mid Semester Examination – March 2019
Course: S.Y. B.Tech (CSE)
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Subject Name: Operating Systems
Max Marks: 20
Date:- 13/03/2019
Sem: II
Subject Code: BTCOC403
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Duration:-1 Hr.
Instructions to the Students:
- Check that you have received a correct Question paper.
- Assume suitable data if necessary and mention it clearly
- Draw NEAT labeled diagrams wherever necessary
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Q.1. Attempt any Six Questions (1*6 = 6 Marks)
- Mention purpose of system call.
- Differentiate between batch system and time sharing system.
- What do you mean by PCB?
- Define turnaround time.
- What are cooperative processes?
- Define starvation.
- Draw labeled process state transition diagram.
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Q. 2. Attempt any Two of the following (2*3 =6 Marks)
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- What are differences between monolithic kernel and microkernel?
- What do you mean by process synchronization? Explain how semaphore can used as synchronization tool.
- What is scheduler? Describe different types of scheduler?
Q.3. Attempt any One of the following (1*8 Marks)
- Consider the following set of processes with the length of CPU burst time
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Process Burst Time Priority
P1 10 3
P2 1 1
P3 2 5
P4 1 4--- Content provided by FirstRanker.com ---
P5 5 2
The processes are assumed to have arrived in the order P1, P2, P3, P4, P5 all at time 0
Draw Gantt chart that illustrate the execution of these processes using preemptive
Priority scheduling (smaller priority number implies higher priority) and RR
scheduling (time quantum = 2)--- Content provided by FirstRanker.com ---
What is turnaround time of each process for each of the scheduling algorithm? - Evaluate performance of preemptive vs. non-preemptive SJF scheduling algorithm using
following set of processes.
Process Arrival Time Burst Time
P1 1 7--- Content provided by FirstRanker.com ---
P2 2 5
P3 3 1
P4 4 2
P5 5 8
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