Question 6 In order to make it easier to compare the relation scheme diagram to the UML diagram, we (check all that apply): ✓ If we realize that we forgot any attributes, we just add them in to the relation scheme diagram. ✔The order of the attributes in the relation scheme mirrors the order in the UML class. Name the relation schemes the plural form of the UML class name. Attribute names in the relation scheme diagram use snake_case.

Question 6 In order to make it easier to compare the relation scheme diagram to the UML diagram, we (check all that apply): ✓ If we realize that we forgot any attributes, we just add them in to the relation scheme diagram. ✔The order of the attributes in the relation scheme mirrors the order in the UML class. Name the relation schemes the plural form of the UML class name. Attribute names in the relation scheme diagram use snake_case.

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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Suppose you are going to design an instant messaging application called Telegraph. Telegraph is a modularized application composed of UI module, Chat module, and Contact module. The UI module uses the Chat module and the Contact module to render the user interface. The Chat module deals with sending and receiving messages. The Chat module uses the Network module for network communication. When users send/receive messages via the network, the Chat module uses the Crypto module to encrypt/decrypt the message. The Contact module manages the contact list. It also uses the Crypto module for encryption/decryption. The Crypto module uses the Math module for calculation. Now we propose a metric to measure the stability of modules. Formally, we define the "stability" of a module i as Si = a+dut where di" (i.e., incoming connection or dependency) is the number of modules that directly or indirectly USES module i and d?ut (i.e., outgoing connection or dependency) is the number of modules that…
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