Answered: The guidance system of a ship is…

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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Question

The guidance system of a ship is controlled by a computer that has three major
modules. In order for the computer to function properly, all three modules must
function. Two of the modules have reliabilities of 0.99, and the other has a
reliability of 0.97
a. What is the reliability of the computer?
b. A backup computer identical to the one being used will be installed to
improve overall reliability. Assuming the new computer automatically
functions if the main one fails, determine the resulting reliability
c. If the backup computer must be activated by a switch in the event that the
first computer fails, and the switch has a reliability of 0.98, what is the overall
reliability of the system.

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