Podcast
Questions and Answers
What is the average turnaround time for the given processes?
What is the average turnaround time for the given processes?
- 6.4 time units
- 8.2 time units
- 7.6 time units (correct)
- 5.8 time units
How is turnaround time calculated?
How is turnaround time calculated?
- Turnaround = Completion Time - Burst Time
- Turnaround = Completion Time - Arrival Time (correct)
- Turnaround = Burst Time + Arrival Time
- Turnaround = Arrival Time - Completion Time
Which of the following statements best describes the Shortest Remaining Time First (SRTF) algorithm?
Which of the following statements best describes the Shortest Remaining Time First (SRTF) algorithm?
- It runs processes based on their arrival sequence only.
- It treats all processes equally and runs them in a strict order.
- It always allows the longest job to run first.
- It chooses the process with the shortest remaining time to run next. (correct)
What happens when a process's quantum expires in a Round-Robin scheduling algorithm?
What happens when a process's quantum expires in a Round-Robin scheduling algorithm?
Which process has the highest turnaround time based on the given data?
Which process has the highest turnaround time based on the given data?
What is the formula for calculating response time in a scheduling algorithm?
What is the formula for calculating response time in a scheduling algorithm?
Which is a key characteristic of the Round-Robin scheduling algorithm?
Which is a key characteristic of the Round-Robin scheduling algorithm?
In the context of performance metrics, what does a lower average turnaround time indicate?
In the context of performance metrics, what does a lower average turnaround time indicate?
What is the main principle used in the Round-Robin scheduling algorithm?
What is the main principle used in the Round-Robin scheduling algorithm?
A quantum in the Round-Robin scheduling algorithm is defined as what?
A quantum in the Round-Robin scheduling algorithm is defined as what?
Which of the following statements about small quantum sizes in Round-Robin scheduling is true?
Which of the following statements about small quantum sizes in Round-Robin scheduling is true?
If a process has a service time of 6 ms and arrives at time 2 ms, how long will the process wait in the Ready Queue after its service starts?
If a process has a service time of 6 ms and arrives at time 2 ms, how long will the process wait in the Ready Queue after its service starts?
What is the average response time for processes that arrive at times 0 ms, 2 ms, and 4 ms with respective service times of 3 ms, 6 ms, and 4 ms?
What is the average response time for processes that arrive at times 0 ms, 2 ms, and 4 ms with respective service times of 3 ms, 6 ms, and 4 ms?
What is the purpose of calculating turnaround time in scheduling algorithms?
What is the purpose of calculating turnaround time in scheduling algorithms?
Which performance metric indicates the time from the completion of a process until the next one starts?
Which performance metric indicates the time from the completion of a process until the next one starts?
Which scheduling algorithm focuses on the process with the shortest remaining service time?
Which scheduling algorithm focuses on the process with the shortest remaining service time?
Which scheduling type would most likely lead to poor response times?
Which scheduling type would most likely lead to poor response times?
In Round-Robin scheduling, how can a larger quantum improve CPU efficiency?
In Round-Robin scheduling, how can a larger quantum improve CPU efficiency?
If Process P1 has a burst time of 4 and arrives at time 0, what is its response time if it starts executing immediately?
If Process P1 has a burst time of 4 and arrives at time 0, what is its response time if it starts executing immediately?
Which of the following statements is true regarding the Round-Robin scheduling method?
Which of the following statements is true regarding the Round-Robin scheduling method?
What is the average turnaround time for the processes given with a set of burst times of 4, 1, 6, 2, 5, and 2, in a Round-Robin schedule?
What is the average turnaround time for the processes given with a set of burst times of 4, 1, 6, 2, 5, and 2, in a Round-Robin schedule?
What criteria does the Shortest Remaining Time First scheduling algorithm use to select the next process to execute?
What criteria does the Shortest Remaining Time First scheduling algorithm use to select the next process to execute?
If a process has a burst time of 6 and arrives at time 3, how is its turnaround time affected in a Round-Robin scheduling scenario?
If a process has a burst time of 6 and arrives at time 3, how is its turnaround time affected in a Round-Robin scheduling scenario?
How is the average response time calculated across multiple processes?
How is the average response time calculated across multiple processes?
Study Notes
Shortest Remaining Time First Algorithm
- The shortest remaining time first algorithm is a preemptive scheduling algorithm which selects the job with the smallest remaining burst (or service) time.
- The algorithm is efficient as it provides the lowest average waiting time.
- Performance Metrics:
- Turnaround Time: The difference between completion time and the arrival time of a process; it is the amount of time a process is in the system.
- Average Turnaround: The average time it takes for a process to complete.
Round-Robin Algorithm
- The Round-Robin algorithm is a scheduling algorithm that assigns equal time intervals to each process, known as quantum.
- This algorithm uses preemption based on a clock.
- The algorithm runs in the following situations:
- When the currently running process is finished.
- When the CPU is available.
- When the quantum for the running process has expired.
- If a process is not finished after its quantum, it is added to the end of the ready queue and waits to run again.
Round-Robin Algorithm Performance Metrics
- Response Time: This is the amount of time it takes for a process to start execution after it arrives in the system.
- Average Response Time: This is the average time it takes for a process to start after arriving.
- Turnaround Time: Similar to the SRTF algorithm, this is the time it takes for a process to compete.
- Average Turnaround Time: The average time it takes for all processes to complete.
Exercises
- Exercise 1:
- The exercise requires the user to simulate CPU scheduling using SRTF and Round Robin algorithms as well as calculate turnaround and response time for six processes.
- Exercise 2:
- The exercise requires the user to simulate CPU scheduling using SRTF and Round Robin algorithms as well as calculate turnaround and response time for three processes.
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Description
This quiz covers essential scheduling algorithms in computer science, focusing on the Shortest Remaining Time First and Round-Robin methods. It explores their efficiency, turnaround times, and performance metrics. Test your understanding of these crucial concepts in process management!
