Answered: Let the processes P1, P2, P3, P4, and…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Let the processes P1, P2, P3, P4, and P5 be given. They arrive in the system at the same time in this order. The processes have the attached service times (in time units) and priorities. For each of the scheduling methods (First Come, first served (FIFO), Shortest Job First, Round Robin, and Priority Scheduling), specify the execution order of the processes and the average execution time (average turnaround time) for all processes. First, determine and state the execution times of the individual processes and then calculate the average value. Note: • For Shortest Job First, If the required service time (CPU time) is the same for two or more processes, use First Come, first served to resolve the conflict. • For Round Robin, the time quantum q = one time unit. • For Priority Scheduling, low integer priority values signify high priorities, with O being the highest possible priority. If multiple processes have the same priority, use First Come, first served to resolve the conflict. Also, remember that RR is pre-emptive. • You do not have to draw Gantt charts.

**Table: Process Scheduling Data**

| Process | P1 | P2 | P3 | P4 | P5 |
|---------|----|----|----|----|----|
| Service time (CPU burst) | 10 | 1 | 3 | 1 | 2 |
| Priority | 3 | 1 | 3 | 4 | 2 |

This table displays information relevant to process scheduling in computing. Each process (P1, P2, P3, P4, P5) has an associated service time, also known as the CPU burst, which indicates the amount of time required for execution. Additionally, each process is assigned a priority number, which might be used in scheduling algorithms to determine the order of execution, with a higher number potentially indicating higher priority.

This data can be utilized to explore concepts such as scheduling algorithms and process management strategies in operating systems.

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