2. Consider the following snapshot of a system with four resource types R1, R2, R3and R4, and four processes A, B, C and D:AllocationR₁R₂RsRRiRaRequestRaAvailableRAR₁R₁₂Ra R₁A101101000000B11000110C10110000D00001Steasejak00Is the system in a deadlock state? If the system is in a deadlock state, list allprocesses that are involve in a deadlock. Show your computation step-by-step;

When two or more processes or threads are stuck in a position where they are waiting for each other…

2. Consider the following snapshot of a system with four resource types R1, R2, R3 and R4, and four processes A, B, C and D: Allocation Request R₁ R2 Rs RA R1 R₂ Rs B RA R1 Available R₂ R3 Ra A 1 0 1 1 0 1 0 0 0 0 0 0 B 1 1 0 0 0 1 1 0 C 1 0 1 1 0 0 0 0 D 0 0 0 0 1 0 1 0 Is the system in a deadlock state? If the system is in a deadlock state, list all processes that are involve in a deadlock. Show your computation step-by-step;

2. Consider the following snapshot of a system with four resource types R1, R2, R3 and R4, and four processes A, B, C and D: Allocation Request R₁ R2 Rs RA R1 R₂ Rs B RA R1 Available R₂ R3 Ra A 1 0 1 1 0 1 0 0 0 0 0 0 B 1 1 0 0 0 1 1 0 C 1 0 1 1 0 0 0 0 D 0 0 0 0 1 0 1 0 Is the system in a deadlock state? If the system is in a deadlock state, list all processes that are involve in a deadlock. Show your computation step-by-step;

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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Suppose a system has 5 processes, P = {P1, P2, P3, P4, P5}, and 4 resources, R = {R1, R2, R3, R4}, where there are 2 instances of R1, 1 instance of R2, 3 instances of R3, and 3 instances of R4. The current state of the system is defined by the following requests and assignments: P1 is requesting an instance of R3 and has been assigned an instance of R2; P2 is requesting an instance of R1 and has been assigned an instance of R3; P3 is requesting an instance of R4 and has been assigned an instance of R1 and an instance of R3; P4 is requesting an instance of R3; P5 is requesting an instance of R2 and has been assigned an instance of R4. Is there deadlock in this system? (Explicitly state yes, there’s deadlock or no, there isn’t.) If applicable, draw a wait-for graph or resource-allocation graph, and use the appropriate graph to justify your answer. If you conclude there is no deadlock, your justification should contain a sequence of execution for the processes which shows that…
Hey, I have already received a good answer to this question but I am looking for greater detail to be provided. There are three processes P1, P2 and P3 are running in a system with 3 instances of a resource R1, 2 instances of a resource R2, and 2 instances of a resource R3. At a given time the allocation matrix is: A = [{1, 1, 1} { 0, 1, 0} { 1, 0, 0 }] Assume that the maximum matrix is M = [ {2,2,1} {1,1,1} {3,1,0}] While in this state, a new process P4 is created which requires at most 2 instances of R1 and one instance of R2. This process initially requests one instance of R1 to be allocated to it. Using the Banker’s algorithm, determine whether this request can be granted or must be refused.
A system has three processes (P1,P2, P3) and three resources (R1,R2, R3). There is one instance of R1 and R2. There are three instances of R3. P1 holds an R1 and is requesting an R3. P2 holds an R3 and is requesting an R1. P3 holds two instances of R3 and an R2. Does a deadlock exist? Justify your answer.
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?
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Consider a system consisting of four processes and a single resource. The total resource before any allocation occurs is 20. The current state of the claim vector is C = (3, 2, 8, 6) and the allocation vector is A = (1, 1, 3, 2). If "Process Initiation Denial" is used as the Deadlock Avoidance policy, should a new process with 2 maximum claim be initiated? O Yes O No
Consider a computer system which has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in any way that is, two in one shot or one by one. The system always satisfies a request for a resource if enough resources are available. If the processes don't request any other kind of resource, show that the system never deadlocks?
Consider a system with five processes, PO →P4, three resource types, A, B, C. Type A has 9 instances, B has 6 instances, C has 6 instances. At time To the following snapshot of the system is taken. Available В С 1 Max Need Allocated A A PO 2 2 P1 7 C 1 2 1 4. 3 P2 4 2 P3 4 3 2 1 P4 3 2 (You may write down the steps and all answers in a paper and upload) a) Is the system in a safe state? b)Write the Sequence c)Calculate Need matrix d)Write the steps, that leads to your conclusion.
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Consider a system with five processes and three resource type. Resource type X has 7 instances, resource type Y has 10 instances and resource type Z has 5 instances. Suppose that at time 0, the following snapshot of the system has been taken. Is the process safe? If yes, what is the safe sequence? If not, which process is unsafe?
Consider a system with five processes, PO →P4, three resource types, A, B, C. Type A has 9 instances, B has 6 instances, C has 6 instances. At time To the following snapshot of the system is taken. Max Need Available Allocated |A В С A В С А В с 1 1 3 2 2 PO P1 2 7 2 4 1 P2 P3 P4 0 2 4 3 O 2 O 2 1. 20 5 3 3 3 2 0 (You may write down the steps and all answers in a paper and upload) a) Is the system in a safe state? b)Write the Sequence c)Calculate Need matrix d)Write the steps, that leads to your conclusion.