[03/Charles/03]
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Questions and Answers

In Data Vault 2.0, what is the classification based on?

  • Entity level
  • Attribute level (correct)
  • View level
  • Table level

    • What kind of identifiers are used in Data Vault 2.0?

  • Foreign
  • Logical (correct)
  • Primary
  • Physical

    • What is the purpose of Satellites in Data Vault 2.0?

  • To capture historical changes (correct)
  • To split classifications
  • To link hubs and business keys
  • To define physical entity names

    • Logical Model Data Vault 2.0 uses physical entity names instead of logical identifiers.

    <p>False</p> Signup and view all the answers

    Satellites in Data Vault 2.0 always split the data into different tables.

    <p>False</p> Signup and view all the answers

    Data Vault 2.0 Hubs contain business keys.

    <p>True</p> Signup and view all the answers

    Match the following terms with their descriptions in Logical Model Data Vault 2.0:

    <p>Hubs = Contain business keys Links = Connect Hubs and Satellites Satellites = Contain historical data Classification = Based on the attribute level</p> Signup and view all the answers

    Match the following features with their characteristics in Data Vault 2.0:

    <p>Logical identifiers = Used instead of physical entity names Entities = Represented as tables or views Satellites = Do not split the data No satellite splits = Classification is on the attribute level</p> Signup and view all the answers

    Match the following terms with their descriptions in Data Vault 2.0:

    <p>Hubs = Contain business keys Links = Connect Hubs and Satellites Satellites = Contain historical data Entities = Represented as tables or views</p> Signup and view all the answers

    What is the main purpose of a logical data model?

    <p>To provide a conceptual representation of the data needed to support business processes</p> Signup and view all the answers

    In a logical data model, what are entities?

    <p>Fundamental objects or concepts that the organization needs to track</p> Signup and view all the answers

    What are attributes in a logical data model?

    <p>Characteristics of entities</p> Signup and view all the answers

    How are relationships defined in a logical data model?

    <p>Connections between entities</p> Signup and view all the answers

    Which modeling techniques are used to create logical data models?

    <p>Entity-relationship diagrams (ERDs) and Unified Modeling Language (UML) diagrams</p> Signup and view all the answers

    What is the role of logical data models in data integration?

    <p>Simplify data integration</p> Signup and view all the answers

    What do logical data models help organizations to identify and eliminate?

    <p>Data silos</p> Signup and view all the answers

    What do physical data models define?

    <p>How the data will be stored and organized in the database</p> Signup and view all the answers

    What is the relationship between logical and physical data models?

    <p>Logical data models are used to create physical data models</p> Signup and view all the answers

    Logical data models are created independently of any specific database management system (DBMS) or physical data storage technology.

    <p>True</p> Signup and view all the answers

    Entities in a logical data model are the fundamental objects or concepts that the organization needs to track.

    <p>True</p> Signup and view all the answers

    Attributes in a logical data model are the characteristics of relationships.

    <p>False</p> Signup and view all the answers

    Logical data models are used to create logical data models.

    <p>False</p> Signup and view all the answers

    Physical data models define how the data will be stored and organized in the database.

    <p>True</p> Signup and view all the answers

    Logical data models help organizations to identify and eliminate data silos.

    <p>True</p> Signup and view all the answers

    Logical data models are specific to a particular DBMS.

    <p>False</p> Signup and view all the answers

    Logical data models are created using a variety of modeling techniques, such as entity-relationship diagrams (ERDs) and Unified Modeling Language (UML) diagrams.

    <p>True</p> Signup and view all the answers

    Relationships in a logical data model define the connections between attributes.

    <p>False</p> Signup and view all the answers

    Match the following components with their descriptions in a logical data model:

    <p>Entities = Fundamental objects or concepts that the organization needs to track Attributes = Characteristics of entities Relationships = Define the connections between entities Modeling Techniques = Used to create logical data models, such as ERDs and UML diagrams</p> Signup and view all the answers

    Match the following reasons with the importance of logical data models:

    <p>Understand data needs = Identify and eliminate data silos Improve data quality and consistency = Simplify data integration Facilitate data governance = Create physical data models specific to a DBMS</p> Signup and view all the answers

    Match the following statements with their accuracy regarding logical data models:

    <p>Logical data models are created independently of any specific DBMS or physical data storage technology = True Logical data models are used to create physical data models = True Logical data models help organizations to identify and eliminate data silos = True Logical data models are specific to a particular DBMS = False</p> Signup and view all the answers

    Match the following modeling techniques with their usage in creating logical data models:

    <p>Entity-relationship diagrams (ERDs) = Used to create logical data models Unified Modeling Language (UML) diagrams = Used to create logical data models Data Vault 2.0 Hubs contain business keys = Not related to creating logical data models Satellites in Data Vault 2.0 always split the data into different tables = Not related to creating logical data models</p> Signup and view all the answers

    Match the following components with their role in a logical data model:

    <p>Entities = Fundamental objects or concepts that the organization needs to track Attributes = Characteristics of entities Relationships = Define the connections between entities Logical data models = Created independently of any specific DBMS or physical data storage technology</p> Signup and view all the answers

    Match the following statements with their characteristics in logical data models:

    <p>Logical data models help organizations to identify and eliminate data silos = True Relationships in a logical data model define the connections between attributes = False Attributes in a logical data model are the characteristics of relationships = False Entities in a logical data model are the fundamental objects or concepts that the organization needs to track = True</p> Signup and view all the answers

    Match the following with their purpose in logical data models:

    <p>Understand their data needs = Purpose of logical data models Identify and eliminate data silos = Purpose of logical data models Improve data quality and consistency = Purpose of logical data models Create physical data models specific to a DBMS = Not a purpose of logical data models</p> Signup and view all the answers

    Match the following with their usage in logical data models:

    <p>Entities = Fundamental objects or concepts that the organization needs to track Attributes = Characteristics of entities Relationships = Define the connections between entities Modeling Techniques = Used to create logical data models, such as ERDs and UML diagrams</p> Signup and view all the answers

    Match the following statements with their importance in logical data models:

    <p>Logical data models help organizations to understand their data needs = Important Logical data models are specific to a particular DBMS = Not important Logical data models are used to create physical data models = Important Logical data models are created using a variety of modeling techniques = Important</p> Signup and view all the answers

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