Data Modeling and Information Systems Quiz
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Questions and Answers

Which of the following best describes an information system?

  • A system that analyzes data
  • A system that models data structures
  • A system that captures, stores, manipulates, and retrieves data (correct)
  • A system that organizes data in a database

What is a data model?

  • A program that captures and stores data
  • A representation of hardware and software constraints
  • A diagram that illustrates the relationship between data
  • A conceptual representation of the data structures required by a database (correct)

What is an entity in a data model?

  • A relationship between tables in a database
  • A class of persons, places, objects, events, or concepts about which data needs to be stored (correct)
  • A descriptive property or characteristic of an entity
  • A unique value for each entity instance

What is an attribute in a data model?

<p>A descriptive property or characteristic of an entity (C)</p> Signup and view all the answers

What is a key in a data model?

<p>An attribute, or a group of attributes, that assumes a unique value for each entity instance (A)</p> Signup and view all the answers

What is an Entity Relationship Diagram (ERD)?

<p>A schematic representation of the database (B)</p> Signup and view all the answers

What is a synonym for an entity in a data model?

<p>Table (D)</p> Signup and view all the answers

What is a synonym for an attribute in a data model?

<p>Property (B)</p> Signup and view all the answers

What is a synonym for a key in a data model?

<p>Primary key (A)</p> Signup and view all the answers

What is a Data Element Dictionary (DED)?

<p>A text representation of the data model (C)</p> Signup and view all the answers

Which type of data model focuses on establishing entities, characteristics of an entity, and relationships between them?

<p>Conceptual Data Model (B)</p> Signup and view all the answers

Which type of data model is used to develop a technical map of rules and data structures for a specific project?

<p>Logical Data Model (C)</p> Signup and view all the answers

Which type of data model defines how data is physically stored in a database?

<p>Physical Data Model (B)</p> Signup and view all the answers

Which data modeling approach is the most common method used to build data models for relational databases?

<p>Entity Relationship Modeling (A)</p> Signup and view all the answers

What is the goal of data modeling?

<p>To represent data objects accurately (C)</p> Signup and view all the answers

What type of data model stores data in a single table?

<p>Simple Data Model (C)</p> Signup and view all the answers

What is the purpose of normalization in database design?

<p>To eliminate data anomalies (C)</p> Signup and view all the answers

Which normal form provides criteria for determining a table's degree of vulnerability to inconsistencies and anomalies?

<p>First Normal Form (C)</p> Signup and view all the answers

Which normal form eliminates only partial dependencies, but not transitive dependencies?

<p>Second Normal Form (A)</p> Signup and view all the answers

Which normal form eliminates all dependencies on non-key attributes?

<p>Third Normal Form (D)</p> Signup and view all the answers

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