Title

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is an ERD?

  • A model for an end-user
  • A physical database
  • A representation of a conceptual database (correct)
  • A collection of entities

What is the ERD?

  • The representation of the conceptual database as viewed by the end-user (correct)
  • The physical database structure
  • The code used to create the database
  • The user interface of the database

What is an ERD?

  • A model of an organization's structure
  • A model of an organization's database (correct)
  • A model of an organization's financials
  • A model of an organization's marketing strategy

What is the purpose of an ERD?

<p>To represent the conceptual database as viewed by the end-user (B)</p> Signup and view all the answers

What are entities in an ER model?

<p>Distinct objects in the organization to be represented in the database (A)</p> Signup and view all the answers

What are entities in an ERD?

<p>Distinct objects in the organization (C)</p> Signup and view all the answers

What does the ERM refer to as an entity instance?

<p>A row in a table (B)</p> Signup and view all the answers

What are entities in an ERD?

<p>Distinct objects in the organization that are to be represented in the database (C)</p> Signup and view all the answers

What is an entity type in an ERD?

<p>A group of objects with the same properties (A)</p> Signup and view all the answers

What is an entity in the ER model?

<p>A distinct object in the organization that is to be represented in the database (A)</p> Signup and view all the answers

What is an entity type?

<p>A group of objects with the same properties (A)</p> Signup and view all the answers

What are attributes in an ERD?

<p>Properties that describe some aspect of the object that we wish to record (C)</p> Signup and view all the answers

What are derived attributes in an ERD?

<p>Attributes that are calculated from other attributes (D)</p> Signup and view all the answers

What are identifiers in an ER model?

<p>One or more attributes that uniquely identify each entity instance (A)</p> Signup and view all the answers

What are relationships in an ERD?

<p>Associations between entities (B)</p> Signup and view all the answers

Why should multi-valued attributes not be implemented in RDBMS?

<p>They can cause data redundancy (B)</p> Signup and view all the answers

What is connectivity in an ERD?

<p>The relationship classification (C)</p> Signup and view all the answers

Can multi-valued attributes be implemented in RDBMS?

<p>No (A)</p> Signup and view all the answers

What is cardinality in an ERD?

<p>The minimum and maximum number of entity occurrences associated with one occurrence of the related entity (A)</p> Signup and view all the answers

What is relationship participation in an ERD?

<p>Whether the relationship is optional or mandatory (D)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Title VII of the Civil Rights Act Flashcards
47 questions

Title VII of the Civil Rights Act Flashcards

KeenMaxwell9176 avatar
KeenMaxwell9176
Title IX and Chapters 1-2 Flashcards
49 questions

Title IX and Chapters 1-2 Flashcards

SafePythagoras avatar
SafePythagoras
Title VII Civil Rights Act Quiz
22 questions

Title VII Civil Rights Act Quiz

StylishPeach4517 avatar
StylishPeach4517
Sexual Violence and Title IX Overview
13 questions

Sexual Violence and Title IX Overview

SalutaryPentagon avatar
SalutaryPentagon
Use Quizgecko on...
Browser
Open
Browser
Browser