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A system has 12 magnetic tape drives and 3 processes : P0, P1, and P2. Process P0 requires 10 tape drives, P1 requires 4 and P2 requires 9 tape drives.
Process
P0
P1
P2
Maximum needs (process-wise: P0 through P2 top to bottom)
10
4
9
Currently allocated (process-wise)
5
2
2
Which of the following sequence is a safe sequence?

A system has 12 magnetic tape drives and 3 processes : P0, P1, and P2. Process P0 requires 10 tape drives, P1 requires 4 and P2 requires 9 tape drives.
Process
P0
P1
P2
Maximum needs (process-wise: P0 through P2 top to bottom)
10
4
9
Currently allocated (process-wise)
5
2
2
Which of the following sequence is a safe sequence?
a) P0, P1, P2
b) P1, P2, P0
c) P2, P0, P1
d) P1, P0, P2

Answer: d
Explanation: P1, P0, P2

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