CPU Scheduling Algorithms MCQ Quiz: FCFS, SJF and Round Robin
Evaluate your knowledge of CPU scheduling algorithms with this MCQ quiz. Covering FCFS, SJF, Round Robin and more, test your understanding of essential concepts in process scheduling.
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📋 Total Questions: 30
⏳ Time Limit: 30 minutes
📝 Marking Scheme: +1 for each correct answer. No negative marking.
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1. In the First-Come, First-Served (FCFS) scheduling algorithm, which process gets executed first?
The process with the shortest burst time
The process with the highest priority
The process that arrives first
The process with the largest memory requirement
2. The Shortest Job First (SJF) algorithm selects processes based on:
Arrival time
Burst time
Priority
Waiting time
3. What is the main disadvantage of the FCFS scheduling algorithm?
It may lead to starvation of short processes
It leads to poor turnaround time for all processes
It is complex to implement
It does not consider priority
4. In the Round Robin (RR) scheduling algorithm, how is the CPU time allocated to each process?
In a continuous manner, without time slices
Based on priority
In fixed time slices or quantum
According to burst time
5. Which of the following is true about the Shortest Job First (SJF) algorithm?
It always provides the shortest turnaround time
It minimizes the waiting time for all processes
It is non-preemptive in its simplest form
It suffers from starvation for long processes
6. Which of the following is a characteristic of the Round Robin (RR) scheduling algorithm?
It is preemptive
It is non-preemptive
It runs processes without time slices
It uses priority to schedule processes
7. The FCFS algorithm is considered as:
Preemptive
Non-preemptive
Shortest job first
Priority-based
8. What is a major drawback of the Shortest Job First (SJF) algorithm?
It results in high waiting time for small processes
It can be difficult to implement in real-time systems
It can cause process starvation
It requires a large amount of CPU time to execute
9. In the Round Robin scheduling algorithm, if the time quantum is very large, it is equivalent to:
First-Come, First-Served (FCFS)
Shortest Job First (SJF)
Priority scheduling
Multiple-Queue scheduling
10. The primary advantage of the FCFS scheduling algorithm is:
It minimizes the average waiting time
It is easy to implement
It eliminates process starvation
It guarantees optimal throughput
11. What type of scheduling does the SJF algorithm use?
Preemptive
Non-preemptive
Priority-based
Multilevel Queue-based
12. Which of the following is a limitation of the Round Robin (RR) scheduling algorithm?
It may cause high turnaround time
It gives priority to short processes
It does not handle I/O-bound processes well
It requires high memory usage
13. The CPU burst time refers to:
The time a process spends in memory
The time a process waits in the queue
The time a process spends executing on the CPU
The time a process is blocked for I/O
14. Which algorithm suffers the most from the problem of starvation?
First-Come, First-Served (FCFS)
Shortest Job First (SJF)
Round Robin (RR)
Priority Scheduling
15. The waiting time of a process in the Round Robin algorithm is:
Constant for all processes
Dependent on the time quantum and process arrival
Equal to the burst time of the process
Zero for all processes
16. How can the problem of starvation in the SJF algorithm be addressed?
By using a priority queue
By implementing aging techniques
By using Round Robin scheduling
By giving priority to longer jobs
17. In the case of two processes with equal burst times, which scheduling algorithm executes them first?
First-Come, First-Served (FCFS)
Shortest Job First (SJF)
Round Robin (RR)
Priority Scheduling
18. What is the key advantage of the Round Robin (RR) algorithm compared to FCFS?
It prevents starvation by ensuring all processes get a turn
It reduces the CPU burst time for each process
It minimizes the turnaround time
It requires less memory
19. In the FCFS algorithm, how is the order of process execution determined?
By the priority level of each process
By the shortest burst time
By the order of arrival of processes
By the size of the process
20. What happens when the time quantum in a Round Robin system is set too low?
It results in context switching overhead
It increases CPU utilization
It improves process completion time
It decreases waiting time
21. What is the purpose of aging in scheduling algorithms?
To increase the priority of processes that have waited too long
To adjust the time quantum dynamically
To reduce the CPU burst time of each process
To allocate more CPU time to high-priority processes
22. What does a high waiting time in the FCFS algorithm usually result in?
A low turnaround time
A high throughput
Poor performance for short jobs
Faster process execution
23. Which of the following is a true statement about the Round Robin algorithm?
It is optimal for CPU-bound processes
It uses a fixed time quantum for each process
It gives priority to I/O-bound processes
It minimizes the average waiting time
24. The Turnaround Time in a scheduling algorithm is defined as:
The time taken by a process to execute on the CPU
The total time taken from the arrival to the completion of a process
The waiting time before a process starts executing
The time spent by a process in I/O operations
25. In the case of two processes with different arrival times and burst times, which algorithm would minimize the average waiting time?
First-Come, First-Served (FCFS)
Shortest Job First (SJF)
Round Robin (RR)
Priority Scheduling
26. In a system using Round Robin scheduling, what happens if there is no time quantum?
The process will execute without any interruption
The system will face high CPU utilization
The scheduling will become equivalent to FCFS
All processes will be suspended indefinitely
27. Which of the following scheduling algorithms is best suited for time-sharing systems?
First-Come, First-Served (FCFS)
Shortest Job First (SJF)
Round Robin (RR)
Priority Scheduling
28. Which CPU scheduling algorithm is used by UNIX and Linux operating systems?
First-Come, First-Served (FCFS)
Shortest Job First (SJF)
Round Robin (RR)
Multi-Level Feedback Queue
29. What is the primary disadvantage of using Shortest Job First (SJF) scheduling in a real-time system?
High context-switching overhead
Difficulty in predicting the burst time for each process
Poor memory management
It doesn't consider process priority
30. In which situation is the Round Robin (RR) scheduling algorithm least effective?
When all processes have equal burst times
When processes have very long burst times compared to the time quantum