An operating system uses the banker’s algorithm for deadlock avoidance when managing the allocation of three resource types X, Y and Z to three processes P0, P1 and P2. The table given below presents the current system state. Here, the Allocation matrix shows the current number of resources of each type allocated to each process and the Max matrix shows the maximum number of resources of each type required by each process during its execution Allocation Max XYZXYZP0001843P1320620P2211333There are 3 units of type X, 2 units of type Y and 2 units of type Z still available. The system is currently in safe state. Consider the following independent requests for additional resources in the current state-REQ1: P0 requests 0 units of X, 0 units of Y and 2 units of ZREQ2: P1 requests 2 units of X, 0 units of Y and 0 units of Z Write a program to check whether:Only REQ1 can be permittedOnly REQ2 can be permittedBoth REQ1 and REQ2 can be permittedNeither REQ1 nor REQ2 can be permitted

Explanation: This is the current safe state. AVAILABLE X=3, Y=2, Z=2 MAX…

Answered: An operating system uses the banker’s…

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

Section: Chapter Questions

Problem 1PE

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An operating system uses the banker’s algorithm for deadlock avoidance when managing the allocation of three resource types X, Y and Z to three processes P0, P1 and P2. The table given below presents the current system state. Here, the Allocation matrix shows the current number of resources of each type allocated to each process and the Max matrix shows the maximum number of resources of each type required by each process during its execution

Allocation

Max

	X	Y	Z	X	Y	Z
P0	0	0	1	8	4	3
P1	3	2	0	6	2	0
P2	2	1	1	3	3	3

There are 3 units of type X, 2 units of type Y and 2 units of type Z still available. The system is currently in safe state. Consider the following independent requests for additional resources in the current state-

REQ1: P0 requests 0 units of X, 0 units of Y and 2 units of Z

REQ2: P1 requests 2 units of X, 0 units of Y and 0 units of Z

Write a program to check whether:

Only REQ1 can be permitted
Only REQ2 can be permitted
Both REQ1 and REQ2 can be permitted
Neither REQ1 nor REQ2 can be permitted

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