Data Modeling Basics

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Questions and Answers

What is data modeling?

  • The process of managing end-user data
  • The process of creating a specific data model for a determined problem domain (correct)
  • The process of creating a database
  • The process of creating a graphical representation of real-world events

What is an entity in data modeling?

  • A graphical representation of a real-world object or event
  • An association among entities
  • A characteristic of an entity
  • A person, place, thing, or event about which data will be collected and stored (correct)

What is a relationship in data modeling?

  • An association among entities (correct)
  • A specific data model for a determined problem domain
  • A graphical representation of real-world data structures
  • A characteristic of an entity

What is a subschema in data modeling?

<p>The portion of the database by the application programs that actually produce the desired information from the data in the database (D)</p> Signup and view all the answers

What is the relational model in data modeling?

<p>A model that represents a major breakthrough for both users and designers (B)</p> Signup and view all the answers

What is the entity relationship model in data modeling?

<p>A model that represents a graphical representation of entities and their relationships in a database structure (A)</p> Signup and view all the answers

What is the importance of data modeling?

<p>To foster improved understanding of the organization for which the database design is developed (C)</p> Signup and view all the answers

What is data modeling?

<p>The process of creating a specific data model for a determined problem domain (B)</p> Signup and view all the answers

What is an entity in a data model?

<p>A person, place, thing, or event about which data will be collected and stored (A)</p> Signup and view all the answers

What is a subschema in a network model?

<p>It defines the portion of the database by the application programs that actually produce the desired information from the data in the database (A)</p> Signup and view all the answers

What is the relational model?

<p>It was introduced in 1970 by E. F. Codd of IBM (D)</p> Signup and view all the answers

What is the entity-relationship model?

<p>It was introduced in 1976 by Peter Chen (A)</p> Signup and view all the answers

What is a segment in the hierarchical model?

<p>The equivalent of a file system's record type (B)</p> Signup and view all the answers

What is the importance of data modeling?

<p>All of the above (D)</p> Signup and view all the answers

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