Please, i need Unique answer, Use your own words (don't copy and paste).

*Please, don't use handwriting.

Q1: For the following resource-allocation graph draw the corresponding wait-for graph and confirm if there exist a deadlock or not.

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Q2 : 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?

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Q3:

Following table contains five processes with their length of the CPU burst given in milli seconds.

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.

1. Draw a Gantt chart to show round-robin scheduling.
2. Calculate the waiting time for each process using round-robin scheduling.
3. Calculate the average waiting time.

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Q4

Describe the operating system's two modes of operation. Distinguish between system and application programs.

P2 R2 R3 P3 P4