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*Assume that there are three processes P1, P2, P3and P4 and four resources R1, R2, R3 and R4. The processes make the requests for resources in the following order: P1 requests R1 P2 requests R2 P3 requests R3 P4 requests R4    P1 requests R2 P2 requests R3 P3 requests R4 P4 requests R1 Assume that there is only one instance of resources R1, R2, R3 and R4.   Draw a resource allocation graph and find out if the above processes will deadlock or not? and What are the four necessary conditions for a deadlock to happen?

*Assume that there are three processes P1, P2, P3and P4 and four resources R1, R2, R3 and R4. The processes make the requests for resources in the following order: P1 requests R1 P2 requests R2 P3 requests R3 P4 requests R4    P1 requests R2 P2 requests R3 P3 requests R4 P4 requests R1 Assume that there is only one instance of resources R1, R2, R3 and R4.   Draw a resource allocation graph and find out if the above processes will deadlock or not? and What are the four necessary conditions for a deadlock to happen?

Database System Concepts
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
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*Assume that there are three processes P1, P2, P3and P4 and four resources R1, R2, R3 and R4. The processes make the requests for resources in the following order:

  • P1 requests R1
  • P2 requests R2
  • P3 requests R3
  • P4 requests R4   
  • P1 requests R2
  • P2 requests R3
  • P3 requests R4
  • P4 requests R1

Assume that there is only one instance of resources R1, R2, R3 and R4.

 

  • Draw a resource allocation graph and find out if the above processes will deadlock or not? and What are the four necessary conditions for a deadlock to happen?                                                                              
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Draw the wait-for graph for the following resource allocation graph, and find is there a possibility of deadlock or not. 

P1 R1 P2 R: R4 R3 P3 P4
Transcribed Image Text:P1 R1 P2 R: R4 R3 P3 P4
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