MCQ

1.What is operating system?
2. Explain PCB with neat diagram.
3.What is thread? Write three point to differentiate it from process.
4.Explain the state transition diagram of a process.
5.Difference between multilevel feedback queue and multilevel queue scheduling algorithm
6.Differentiate between process switching and context switching? [5]
7.Differentiate between process and program. [5]
8.Short note on round robin algorithm. [5]
9.Suppose that the process arrive for execute at the time indicated

Process Arrival
time

Burst time Priority

P 0 0 5 2
P 1 2 7 4
P 2 3 9 1
P 3 3 4 5
P 4 4 3 3

Draw the Gantt chart and calculate the average waiting time for:-
FCFS scheduling algorithm.
Priority scheduling algorithm.
Pre-emptive SJF scheduling algorithm.
Round robin scheduling algorithm. [2+2+2+2=8]

10.Differentiate between process Pre-emptive and non-Pre-emptive priority scheduling? [5]
11.Multiprogramming implies multitasking but vice versa is not true explain.
12.What is spooling?