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GO Classes CS Test Series | Operating Systems | Subject Wise Test 3 | Question: 2

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1 1 vote

A system shares $12$ resources of the same type between $3$ processes P1, P2 and P3. The current allocation and maximum requirements of the processes are shown below:
$$
\begin{array}{|c|c|c|}
\hline
\text{Process} & \text{Current Allocation} & \text{Maximum Requirement} \\
\hline
P1 & 3 & 4 \\
P2 & 4 & 9 \\
P3 & 4 & 8 \\
\hline
\end{array}
$$
Which of the following best describes the current state of the system?

  1. Safe, Deadlocked
  2. Safe, Not Deadlocked
  3. Not Safe, Deadlocked
  4. Not Safe, Not Deadlocked

1 Answer

1 1 vote
$$
\begin{array}{|c|}
\hline
\text{Need} \\
\hline
1 \\
5 \\
4 \\
\hline
\end{array}
$$

$\mathrm{P} 1 \rightarrow \mathrm{P} 3 \rightarrow \mathrm{P} 2$

- First P1 can satisfy, and after Completion the system will have 4 resources.

- Second P3 can satisfy, and after Completion the system will have 8 resources.

- Third P2 can satisfy, and after Completion the system will have 12 resources
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