Consider the following state of a system consisting of four processes and four resources as shown...

 

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Consider the following state of a system consisting of four processes and four resources as shown in Figure 1 below. PA PB PC PD R1 R2 3 0 2 R3 2 2 3 2 1 3 Claim Matrix 1 2 2 R4 0 1 2 1 PA PB PC PD (a) Show the content of the available vector. (b) Show the content of the Need matrix. R1 R2 R3 R4 1 1 0 0 0 1 1 0 1 2 0 1 0 1 1 Allocation Matrix Figure 1 1 R1 3 R2 R3 R4 4 5 4 Resource Vector [4 marks] [8 marks] (c) Is the system currently in a safe or unsafe state? If it is in a safe state, give the order in which the five processes will finish, and if it is in an unsafe state, list processes that may become deadlocked. [8 mark] Consider the following state of a system consisting of four processes and four resources as shown in Figure 1 below. PA PB PC PD R1 R2 3 0 2 R3 2 2 3 2 1 3 Claim Matrix 1 2 2 R4 0 1 2 1 PA PB PC PD (a) Show the content of the available vector. (b) Show the content of the Need matrix. R1 R2 R3 R4 1 1 0 0 0 1 1 0 1 2 0 1 0 1 1 Allocation Matrix Figure 1 1 R1 3 R2 R3 R4 4 5 4 Resource Vector [4 marks] [8 marks] (c) Is the system currently in a safe or unsafe state? If it is in a safe state, give the order in which the five processes will finish, and if it is in an unsafe state, list processes that may become deadlocked. [8 mark]

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