Recognize the impact of the interaction between design decisions and operating system features on the performance and robustness of the programs

Recognize the impact of the interaction between design
decisions and operating system features on the performance and
robustness of the programs

For the following resource-allocation graph draw the corresponding wait-for graph and confirm if there exist a deadlock or not.

P1

R1

R2

R3

P2

P3

P4

Question Two

1 Mark

Learning Outcome(s):
LO 2: Identify the services of modern operating systems and use system calls.

More than one process can be executed by a single processor using
multi-programing or multi-tasking. How can this be achieved on a
uniprocessor system?

Question Three

2 Mark

Learning Outcome(s):
LO 5: Assess the performance of the programs through well designed measurements using OS timings features.

Following table contains five processes with their length of the CPU burst given in milli seconds. (1 + 0.5 + 0.5 = 2 Marks)

Processes Burst Time (ms)
P1 17
P2 8
P3 12
P4 5
P5 9

Answer the following questions using Round-Robin scheduling
algorithm with a time quantum of 4 milli seconds and show all the
calculations.

a) Draw a Gantt chart to show round-robin scheduling.

b) Calculate the waiting time for each process using round-robin scheduling.

c) Calculate the average waiting time.

Question Four

1.5 Mark

Learning Outcome(s):
LO 1: Describe the OS mechanism for process management, timing, memory, I/O, file and concurrency management

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