Understanding CPU Scheduling Algorithms

What is the main principle behind First-Come, First-Served scheduling?

• Processes are executed in reverse order of arrival.

• Processes are executed based on priority levels.

• Processes are executed in the order they arrive.

• Processes are executed randomly without any order.

How does Shortest Job Next scheduling determine which process to execute next?

• It prioritizes processes based on their arrival time.

• It selects the process with the smallest estimated run time.

• It randomly selects any process to execute next.

• It selects the process with the longest estimated run time.

What are the advantages of using Round Robin Scheduling?

• Ineffective for batch processing

• Higher waiting time for processes

• Increased complexity in scheduling

• Fairness, reduced waiting time, simplicity, good response time, and effective for time-sharing.

In Priority Scheduling, how are priorities assigned to processes?

• Priorities are assigned based on factors like importance, expected execution time, or process age.

• Priorities are assigned randomly for fairness.

• Priorities are determined solely by the process name.

• All processes have the same priority level.

What is a potential drawback of First-Come, First-Served scheduling?

• Improved resource utilization for all tasks.

• Increased waiting time for shorter processes due to long processes being served first.

• Reduced complexity in scheduling processes.

• Equal waiting time for all processes regardless of length.

How does Shortest Job Next scheduling affect average waiting time?

• Shortest Job Next scheduling increases average waiting time.

• Shortest Job Next scheduling only benefits long jobs.

• Shortest Job Next scheduling reduces average waiting time.

• Shortest Job Next scheduling has no effect on average waiting time.

What is the time quantum in Round Robin Scheduling?

• The time quantum is the maximum time a process can wait in the queue.

• The time quantum is the total time a process can run before being terminated.

• The time quantum is variable and changes with each process.

• The time quantum is a fixed time slice allocated to each process.

What happens if two processes have the same priority in Priority Scheduling?

• The scheduler ignores the priority and executes randomly.

• The process with the lower ID is always executed first.

• The scheduler uses a secondary criterion to decide which process to execute.

• Both processes are executed simultaneously without any order.

Can First-Come, First-Served scheduling lead to starvation? Why or why not?

• Yes, FCFS can lead to starvation if processes arrive at different times.

• FCFS can cause starvation due to high-priority processes being delayed.

• Starvation is possible in FCFS if there are too many short processes.

• No, FCFS scheduling cannot lead to starvation.

What is the impact of context switching in Round Robin Scheduling?

• Context switching increases overhead and can reduce CPU efficiency in Round Robin Scheduling.

• Context switching is only relevant in priority-based scheduling, not Round Robin.

• Context switching improves overall system performance in Round Robin Scheduling.

• Context switching has no effect on CPU efficiency in Round Robin Scheduling.