Just explain whole questions in one lines per part Consider the resource allocation graph shown in Figure 1:p1P2P3R4P4P5Figure 1 Processes and resources allocation grapha) Assume all processes makes no further requests. Is the current system state is deadlocked or not?Explain?b) If P5 requests one unit of R2 Is the resulting system state is deadlocked or not? Explainc) If P3 requests one more unit of R1 and P2 requests one unit of R4, Is the resulting system state isdeadlocked or not? Explaind) Assumes that p2 holds one unit resource of R4, is the resulting system state is deadlocked or not?Explain

Before answering the above question let us know what is deadlock Deadlock: Deadlock is a situation…

Answered: Just explain whole questions in one…

Engineering

Computer Science

Just explain whole questions in one lines per part

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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22. A system has two processes and three identical resources. Each process needs a maximum of two resources. Is deadlock possible? Explain your answer 23. Consider the previous problem again, but now with p processes each needing a maximum of m resources and a total of r resources available. What condition must hold to make the system deadlock free? please answer the second question...
We are dealing with 6 processes p1;p2; : : : ;p6:(a) Processes p1;p2 in p3 arrive at time 2 ms, respectively. Each of those processesneeds 5 ms of CPU time.(b) Process p4 arrives at time 10 ms and needs 3 ms of CPU time.(c) Processes p5 in p6 arrive at time 19 ms. Process p5 needs 7 ms, while process p6needs 4 ms of CPU time.Scheduling is preemptive, where there process switch takes 1 ms. For the Round-Robinalgorithms with quantum 2 ms illustrate the execution of those processes on a timeline.Then determine the average turnaround time.
There are 3 resources R1, R2 and R3 with one instance each and three processes P1, P2 and P3 in an operating system. A snapshot of the system resource allocation graph shows the following: R1 is allocated to P2; R2 is allocated to P1; R3 is allocated to P3; P1 requests R1; P2 requests R3; P3 requests R2. Which of the following is true about this system? answer ) a)Undetermined b)There is deadlock in the system c)Deadlock will never happen d)There is no deadlock in the system
In the following resource allocation graph, are the processes deadlocked? If “yes” explain why and state which processes are involved in deadlock. If “not” explain why.
Consider a system with three processes (P1, P2, and P3) and four resources (R1 has one instance, R2 has two instances, R3 has one instance, and R4 has three instances). The Snapshot at time Tx has the following situation: P1 holds one instance from Resource R2 and Request Resource R1 P2 holds Resource R1, one instance from Resource R2 and Request Resource R3 P3 holds Resource R3 and Request one instance from Resource R2 Draw the Resource Allocation Graph, then check if the system in safe state or not? If yes? What is the safe sequence?
Problem: A single process, with execution time of BT time units, is detected by the system that uses Round Robin algorithm with time quantum of QT time units. Every time the time quantum elapses; a context switch is always performed with CS time units. Assume that the process come at time equal to zero (0). 1) If BT is 25, QT is 10 and CS is 2, what is the CPU utilization of the system? a. Below 70% b. 70-79% c. 90- 100% d. 80-89% 2) If BT is 20, QT is 6 and CS is 1, what is the CPU utilization of the system? a. 95- 100% b. 90- 94% c. Below 85% d. 85-89% 3) What is the CPU utilization if BT is equal QT and QT is equal to CS? a. 100% b. 50% c. 75% d. 60% 4) What is the system’s throughput if BT is less than QT? a. 3/BT b. Undetermined c. 1/BT d. 2/BT 5) What is the system’s turnaround time (TAT) if BT is less than QT? a. BT/QT b. BT c. CS d. QT
assume a system has 6 identical resources and N processes competing for them. each process can request at most 2 resources. what is the maximum value of N for the system to be deadlock free?
Question 4 Execute SRT for the following group of processes and complete the following table: Process A B C D E TArrival 0 2 4 6 8 Ts 2 3 5 1 4 TFinish Answer Answer Answer Answer Answer TR Answer Â Answer Â Answer Â Answer Â Answer Â 1. If the process arriving has the same remaining execution time as the process in the CPU, then the process that is using the CPU will have the highest priority.Â 2. If there is no process in the execution state and two or more processes have the shortest remaining time, then you will use the lowest PID criterion (using lexicographical order). Question 5 Execute HRRN for the following group of processes and complete the following table: Process A B C D TArrival 0 2 4 6 Ts 3 5 4 1 TFinish Answer Answer Answer Answer TR Answer Â Answer Answer Answer Â If two or more processes in the ready queue…
Consider the following processes:Process Arrival Time Service Time A 0 4 B 1 3 C 2 3 D 2 2 E 3 1 F 5 3 Show (draw the schedule, x-axis is time, and one row for each CPU) how the aboveprocesses execute over time on a system with 2 CPUs. Compute the average turnaroundtime for all processes and the average utilization for each CPU under each of the following schedulers: (a) FCFS with a single Ready Queue. A process gets scheduled once one of the CPUsis available. When both CPUs are available, we select CPU1. (b) FCFS with a Ready Queue per CPU. Processes A, B, and C go to CPU1 and processesD, E, and F go to CPU2. (c) HRRN with a single Ready Queue. A process gets scheduled once one of the CPUsis available. When both CPUs are available, we select CPU1.
4. With a single resource, deadlock occurs a. if there are more than two processes competing for that resource b. if there are only two processes competing for that resource c. if there is a single process competing for that resource d. none of these
A system has three processes (P1, P2, P3) and three reusable resources (R1, R2, R3). There is one instance of R1, two instances of R2 and three instances of R3. P1 holds an R1 and an R3 and is requesting an R2. P2 holds an R3 and is requesting an R1 and an R2. P3 holds two R2 and an R3 and is requesting an R1. How many cycles are there? Does a deadlokc exist? Why?
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