Download Operating System File

OPERATING SYSTEM CONEPTS AND PRACTISE
ASSIGNMENT 1 (10%)
DUE DATE: 18-02-2014
Total: 10 marks
Each question carries 1 mark.
1. Define an operating system. Explain two viewpoints of OS role.
2. What are Operating System operations? Explain?
3. Explain IPC mechanism. What are the different methods used for logical
implementation of message passing system? Explain one of them.
4. Discuss three common ways of establishing relationship between the
user and kernel thread?
5. What is a process? Draw and explain the process state diagram.
6. Write and explain the sequence of system calls for copying a file to
another (new) file.
7. What is multithreading? Explain the benefits of multithreaded
programming?
8. Consider the following set of process.
Process
Burst Time
P1
6
P2
3
P3
8
P4
1
a. Draw Gantt charts that illustrates the execution of these process using
first come first serve (FCFS), and Shortest Job first (SJF).
b. Calculate the average waiting time for each scheduling algorithm.
9. Draw Gantt charts that illustrate the execution of these processes given
below using Shortest Job First (SJF) preemptive and non-preemptive.
Process
Arrival time
Burst Time
P1
0.0
7
P2
2.0
4
P3
4.0
1
P4
5.0
3
a. Calculate the average waiting time for each algorithm and compare
the performance.
b. Using the above process draw Gantt chart and illustrate the
execution of priority scheduling, Assume the burst time to be the
Priority time and solve the algorithm.
10. Draw Gantt charts that illustrate the execution of these processes
using Round robin scheduling algorithm (RR) and calculate the average
waiting time.
Time quantum=3 milliseconds
Process
Arrival time
Burst Time
P1
0
5
P2
1
3
P3
2
8
P4
3
6