On a real computer system, neither the resources available nor the demands of processes for resources are consistent over long periods (months). Resources break or are replaced, new processes come and go, new resources are bought and added to the system. If deadlock is controlled by the banker's algorithm, which of the following changes can be made safely (without introducing the possibility of deadlock), and under what circumstances?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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On a real computer system, neither the resources available nor the demands of processes for
resources are consistent over long periods (months). Resources break or are replaced, new
processes come and go, new resources are bought and added to the system. If deadlock is
controlled by the banker's algorithm, which of the following changes can be made safely
(without introducing the possibility of deadlock), and under what circumstances?
a) Increase Available (new resources added).
b) Decrease, Available (resource permanently removed from system).
c) Increase Max for one process (the process needs more resources than allowed; it may
want more).
d) Decrease Max for one process (the process decides it does not need that many
resources).
e) Increase the number of processes. 

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