In the resource allocation graph below the letters A, B,..., I represent processes whilenumbers 1, 2,..., 9 represent resources. An arrow going from a resource to a processmeans that the process holds the resource.F23B69 (E)74H8(a) Find all processes (in the graph above) which are in a deadlock.(b) We may kill one or more processes to break the deadlock. Which process should bekilled?(c) Assume that there are four processes labeled A, B, C, D and four resources labeled1, 2, 3, 4. Draw the resource allocation graph for the following sequence of requests.(The resource is assigned to the first process that requested it.)process B requests resource 2;process C requests resource 1;process A requests resource 2;process C requests resource 4;⚫process A requests resource 3;⚫process D requests resource 4;⚫process B requests resource 3;process D requests resource 1.Which of the above processes are in a deadlock? Justify your answer.

(c) Process B requests resource 2:B→2Process C requests resource 1:C→1Process A requests resource 2…

Answered: In the resource allocation graph below…

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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Given that there are FIVE (5) processes (A, B, C, D and E) and FOUR (4) resources (R1, R2,R3 and R4) involved in a project. Assume that all the resources are non-sharable and the number of instances for each resource is 2, 3, 2, 3 respectively. *Process A holds one instance of R1, R2 and R4. It requests one instance of R3.* Process B holds one instance of R1 and R3. It requests one instance of R4.* Process C holds one instance of R2 and R4.* Process D holds one instance of R2 and R4. It requests one instance of R1.* Process E holds one instance of R3. It requests one instance of R2. (i) Draw a directed resources allocation graph for the above scenario and Are these five processes in a deadlock state? Justify your answer.
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