A social network company called Feta makes its profit by spreading rumours. They often want toknow whether in a group of people there is somebody from whom a rumour can propagate to everymember of the group (via retweets); the rumours are saucy enough that they are pretty sure everyoneretweets them. They have the information who in the group follows whom, and would like to useit to determine how many (if any) people in the group can be the starting point of a rumour whicheveryone would eventually get. Your job is to design an algorithm which would compute this numberin linear time, given who follows whom in the group.

The algorithm is about a social network company called Feta which makes its profit by spreading…

Answered: A social network company called Feta…

A social network company called Feta makes its profit t know whether in a group of people there is somebody fro member of the group (via retweets); the rumours are sauc

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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Concept explainers

Network Security

The word "network security" refers to a wide range of technology, devices, and processes. In its most basic form, it is a combination of rules and configurations that use both hardware and software technologies to safeguard the confidentiality, integrity, and accessibility of computer networks and data. Every company, regardless of sector, size or infrastructure, needs network security solutions to protect itself from the ever-increasing landscape of cyber threats that exist today.

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A social network company called Feta makes its profit by spreading rumours. They often want to
know whether in a group of people there is somebody from whom a rumour can propagate to every
member of the group (via retweets); the rumours are saucy enough that they are pretty sure everyone
retweets them. They have the information who in the group follows whom, and would like to use
it to determine how many (if any) people in the group can be the starting point of a rumour which
everyone would eventually get. Your job is to design an algorithm which would compute this number
in linear time, given who follows whom in the group.

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