What is the main difference between a virus and a Trojan?

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
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  1. What is the main difference between a virus and a Trojan?
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ANSWER:- 

INTRODUCTION VIRUS AND TROJAN :-

Virus:-

When a computer program is attached with a virus, it performs some action, for example deleting a file from the computer system when it runs attached to another executable file that can be harmless or can modify or delete data. Viruses cannot be controlled remotely.

Trojan:-

As well as being a type of malware, Trojan Horses also use false and false names to mislead users into believing their true intent and executing it. It is common for Trojan Horses to install on the system as useful and legitimate software that allows hackers to gain access to and control of the system. Back orifices, Rootkits, and Beast Trojans are among the most harmful Trojan horses.

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