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6 . 5 Given the following state for the Banker's algorithim: 6 processes p 0 through p 5 4 resources types: A ( 1 5
Given the following state for the Banker's algorithim: processes p through p
resources types: A instances; B instances; Cinstances; D instances
Snapshot at time T:
Available
A B C D
The first four columns of the matrix comprise the Allocation matrix. The final four
columns comprise the Claim matrix. The Need matrix referred to in part b is the same
as the A matrix described in the text.
a Verify that the Available array has been correctly calculated.
b Calculate the Need matrix.
c Show that the current state is safe, that is show a safe sequence of processes. In
addition, to the sequence show how the Available working array changes as each
process terminates.
d Given the request from Process P Should this request be granted? Why
or why not?
In the code below, three processes are competing for six resources labeled A to F
a Using a resource allocation graph see Figures and show the possibility of
a deadlock in this implementation.
b Modify the order of some of the get requests to prevent the possibility of any dead
lock. You cannot move requests across procedures, only change the order inside
each procedure. Use a resource allocation graph to justify your answer.
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