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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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Hello. Please help me answer these questions. Thank you.

1) How many instances of each resource type does the system have?

2) What is the content of the matrix need? Draw the table.

3) Is the system in a safe state? Why?

4) If a request from process P1 arrives for (0,4,2, 0), can the request be granted immediately? Explain why.

(Hint: Suppose the request is granted, then is the system safe? If yes, then the request can be granted immediately; else, it cannot be granted. So, for this question, you need to inspect whether the system is safe afterthe request is granted.)

Consider the following snapshot of a system:
Allocation
AB C D
0 0 1 2
1 0 0 0
1 3 5 4
0 6 3 2
0 0 1 4
Маx
Available
AB C D AB C D
0 0 1 2
1 7 5 0
1 5 2 0
Ро
P1
P2
2 3 5 6
0 6 5 2
0 6 5 6
P3
P4
Answer the following questions using the banker's algorithm:

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