[03/Dnieper/02]

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Questions and Answers

What type of keys are used for hubs in the logical model?

Composite keys
Business keys (correct)
Foreign keys
Primary keys

What type of data flow is defined in load definitions for entities and attributes in a data-driven model?

Random
From logical model to source
Bi-directional
From source to logical model (correct)

What do link references in the logical model refer to?

Primary keys
Hubs (correct)
Satellites
Foreign keys

Logical models in a data-driven model are not loaded from any source entity or attribute.

False (B)

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In the logical model, link references are references to satellites.

False (B)

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Business keys are used for hubs in the logical model.

True (A)

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Match the following terms with their descriptions in the logical model:

Hubs = Entities representing core business concepts with business keys Links = Entities connecting hubs and satellites with reference to hubs Satellites = Entities containing descriptive data and tracking rate of change Business keys = Unique identifiers for hubs in the logical model

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Match the following with their role in data-driven logical model:

Source entity = Provider of entities in the data-driven model Source attribute = Provider of attributes in the data-driven model Data flow = Specification of the movement of data from source to logical model Load definitions = Define the process of loading entities and attributes from sources

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Match the following with their usage in the logical model:

Descriptive data = Includes security/privacy/rate of change classifications Dependent child/transaction IDs = Used as keys for non-historized or dependent child data Link references = References to hubs in links Data-driven model = Has a source of data for the model and defines the data flow

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