(A) What are the reasons for providing interprocess communication?

A car manufacturing company manufactures 10 cars. The process that goes into manufacturing a car involves various stages. Let's assume the car number C31, starts its assembling process for each of its parts. There is proper system counter maintained for each car that basically represents the five phases During each phase, the counter points to the next level of the assembling process and currently the counter is pointing to Phase 4. The company is maintaining a policy of Priority Scheduling to complete the task. Considering the car number as the process id and the phases as the instruction numbers, design the process control block for the car.

Given in Table 1 is a set of five (5) processes with the priority, length of the CPU-burst time, and arrival time. Table 1 Process Arrival Time (ms) Burst Time (ms) Priority* P1 3 P2 1 2 1 P3 3 P4 7 P5 8 8 4. *Note: • A smaller priority number implies a higher priority. a) Compute the Waiting Time (WT) of each process in Table 1, and also compute their Average Waiting Time, for each of the following scheduling algorithms. i. Shortest Job First (SJF). ii. Pre-emptive Priority (PP) iii. Round Robin (RR) with quantum = 3 (ms).

Consider the following set of processes, with the length of the CPU-burst time given in milliseconds, Process CPU Burst Time P1 P2 1 P3 P4 1 P5 7 The processes are assumed to have arrived in the order P1, P2, P3, P4, P5 all at time 0. Draw four Gantt charts illustrating the (i) execution of these processes using SJF and RR (quantum = 1) scheduling. (ii) What is the waiting time of each process for each of the scheduling algorithms in part (i)? %3D