Enhanced Discovering Computers, Fundamentals: Your Interactive Guide To The Digital World, 2013 Edition (shelly Cashman)
1st Edition
ISBN: 9781133596448
Author: Misty E. Vermaat
Publisher: Cengage Learning
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Chapter 1, Problem 13CT
Program Plan Intro
Malware:
- Malware is a malicious software designed to damage the computer system without the owner’s permission or knowledge.
- It performs fraudulent activities and sends spam messages to steals the personal information of user.
- It also has Trojan horses and worm-type rouge programs.
Virus:
- A computer virus is a form of malicious code that contains replicated data which is embedded into another
program . This type of “infected file” is called as virus host. - So, the virus program infects the programs in the host, and it runs along with the host program when the host is executed.
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A Dia file has been created for you to extend and can be found on Company.dia represents a completed ER schema which, models some of the information implemented in the system, as a starting point for this exercise.
Understanding the ER schema for the Company database.
To demonstrate that you understand the information represented by the schema, explain using EMPLOYEE, DEPARTMENT, PROJECT and DEPENDENT as examples:
attributes, entities and relationships
cardinality & participation constraints on relationships
You should explain questions a and b using the schema you have been given to more easily explain your answers.
Creating and Extending Entity Relationship (EER) Diagrams.
To demonstrate you can create entity relationship diagrams extend the ER as described in Company.dia by modelling new requirements as follows:
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Chapter 1 Solutions
Enhanced Discovering Computers, Fundamentals: Your Interactive Guide To The Digital World, 2013 Edition (shelly Cashman)
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