Operating System - Old Questions
What is the use of DMA controller? Consider the following process and answer the following questions.
Process | Allocation | Max | Available |
[A,B,C,D] | [A,B,C,D] | {A,B,C,D] | |
P0 | 0 0 1 2 | 0 0 1 2 | 1 5 2 0 |
P1 | 1 0 0 0 | 1 7 5 0 | |
P2 | 1 3 5 4 | 2 3 5 6 | |
P3 | 0 6 3 2 | 0 6 5 2 | |
P4 | 0 0 1 4 | 0 6 5 6 |
a) What is the content of need matrix?
b) Is the system in safe state?
c) If P2 request (3 4 0 2) , can the request be granted immediately.
10 marks
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Asked in 2024