Q1.(4 points) A system has a total of 8 resources of a particular type. There ar
ID: 3595069 • Letter: Q
Question
Q1.(4 points) A system has a total of 8 resources of a particular type. There are 4 processes running with their maximum resources needs and current allocation of resources as shown below
Process Max need Current allocation
P1 3 1
P2 2 1
P3 5 2
P4 6 2
Specify all the safe sequence from the state shown above
Answer:
b) If P4 wereto request 1 resource, should the request be granted? (Yes or No)
If yes –then indicate a safe sequence from the resulting state:
Answer:
If No –then indicate the sequence of steps that would lead to a deadlock
Answer:
Explanation / Answer
a)
The safe sequence is the order of resource allocation for which all the processes can successfully complete their execution.
For the given system, there are 2 free resources that can be allocated to the processes.
Therefore, the safe sequences for the given states are as follows:
Explanation:
The sequence of resource allocation given above is as follows:
Explanation:
The sequence of resource allocation given above is as follows:
Explanation:
The sequence of resource allocation given above is as follows:
Explanation:
The sequence of resource allocation given above is as follows:
Explanation:
The sequence of resource allocation given above is as follows:
Explanation:
The sequence of resource allocation given above is as follows:
b)
The states of the resources after allocating 1 more resource to the process P4 is as follows:
Process Max need Current allocation
P1 3 1
P2 2 1
P3 5 2
P4 6 3
Now, there is only 1 free resource available.
Yes, 1 more resource can be allocated to the process P4. The safe sequences for this scenario are as follows:
Explanation:
The sequence of resource allocation given above is as follows:
Explanation:
The sequence of resource allocation given above is as follows:
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