Operating system mcqs cpu scheduling algorithms
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Question 1 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
The portion of the process scheduler in an operating system that dispatches processes is concerned with .....
assigning ready processes to CPU
assigning ready processes to waiting queue
assigning running processes to blocked queue
all of the mentioned
Question 2 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
What is Scheduling?
allowing a job to use the processor
making proper use of processor
all of the mentioned
none of the mentioned
Question 3 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
Preemptive Shortest Job First scheduling is sometimes called .....
Fast SJF scheduling
EDF scheduling - Earliest Deadline First
HRRN scheduling - Highest Response Ratio Next
SRTN scheduling - Shortest Remaining Time Next
Question 4 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
Which of the following statements are true? (GATE 2010) I. Shortest remaining time first scheduling may cause starvation II. Preemptive scheduling may cause starvation III. Round robin is better than FCFS in terms of response time
I and III only
II and III only
I, II and III
Question 4 Explanation:
I) Shortest remaining time first scheduling is a preemptive version of shortest job scheduling. It may cause starvation as shorter processes may keep coming and a long CPU burst process never gets CPU. II) Preemption may cause starvation. If priority based scheduling with preemption is used, then a low priority process may never get CPU. III) Round Robin Scheduling improves response time as all processes get CPU after a specified time.
Question 5 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
Which of the following scheduling algorithms gives minimum average waiting time?
Round - robin
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