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