L-4.5: Deadlock Avoidance Banker's Algorithm with Example |With English Subtitles

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Banker's algorithm is a deadlock avoidance algorithm. It is used in banking systems to determine whether a loan can be granted or not.
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[@golluunlimited]

I am struggling to resolve the questions like this..below any help please? Consider four resource types with the following profile in this system: Resource Type Rank Number of Instances RT1 4 2 RT2 7 4 RT3 8 3 RT4 10 2 Let the following sequence of resource requests be processed by the system (note that REQ(A, B, k) represents the request of k resources of type B by process A and REL(A, B, k) represents process A releasing k resources of type B): * REQ(P4, RT2, 3) * REQ(P3, RT3, 2) * REQ(P2, RT4, 1) * REL(P4, RT2, 3) * REQ(P4, RT1, 2) * REL(P2, RT4, 1) * REL(P3, RT3, 2) * REQ(P3, RT2, 3) * REQ(P2, RT3, 2) * REQ(P1, RT4, 2) Note that all of the above request and release operations can be processed without any violation of the deadlock-prevention policy of the system. For each of the following sequences of request/release operations, examine if it can or cannot be processed without violating the deadlock-prevention scheme above. Can you identify a sequence that is allowed by the scheme and consequently can be processed without leading to system deadlock? a) REL(P2, RT3, 2), REQ(P4, RT4, 2), REQ(P2, RT4, 2), REQ(P1, RT1, 2) b) REL(P2, RT3, 2), REQ(P4, RT2, 2), REQ(P3, RT3, 2), REQ(P2, RT2, 3) c) REQ(P2, RT4, 2), REL(P3, RT2, 3), REQ(P4, RT2, 2), REQ(P3, RT1, 2) d) REQ(P4, RT2, 3), REL(P2, RT3, 2), REQ(P2, RT4, 2), REQ(P3, RT1, 2) e) REQ(P3, RT3, 2), REL(P4, RT1, 2), REQ(P4, RT4, 2), REQ(P2, RT2, 3)

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Explaination bhi synchronize tha lol no deadlock no doubt