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WGU C170 Data Management Actual preparation test exam with Thorough and Correct answers Updated 2024/2025 $11.49
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WGU C170 Data Management Actual preparation test exam with Thorough and Correct answers Updated 2024/2025
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WGU C170 Data Management Actual preparation test exam with Thorough and Correct answers Updated 2024/2025 COMMIT - correct answer The SQL command that permanently writes data changes to a database. COUNT - correct answer A SQL aggregate function that outputs the number of rows containing not ...

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  • August 30, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
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  • WGU 170
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WGU C170 ER-Modeling Knowledge test
Exam Toolkit Questions and Verified Marking
Scheme 2024/2025

In Chen notation, there is no way to represent cardinality. - correct answer FALSE


Knowing the minimum and maximum number of .......................occurrences is very
helpful at the application software level. - correct answer entity


Connectivities and cardinalities are established by concise statements known as
business rules. - correct answer TRUE


A composite identifier is a primary key composed of more than one attribute. - correct
answer TRUE


An entity in the entity relationship model corresponds to a table in the relational
environment. - correct answer TRUE


In the Chen and Crow's Foot notations, an entity is represented with a rectangle
containing the entity's name. - correct answer TRUE


In implementation terms, an entity is existence-dependent if it has a mandatory primary
key. - correct answer FALSE


.......................___ expresses the minimum and maximum number of entity occurrences
associated with one occurrence of the related entity. - correct answer Cardinality


The _______ notation of entity-relationship modelling can be used for both conceptual
and implementation modelling. - correct answer UML

, A derived attribute is indicated in the Chen notation by a ......................._ that connects
the attribute and an entity. - correct answer dashed line


The concept of relationship strength is based on how the ......................._ of a related
entity is defined. - correct answer primary key


A weak relationship exists if the primary key of the related entity contains at least one
primary key component of the parent entity. - correct answer FALSE


To simplify the conceptual design, higher-order relationships are decomposed into
appropriate equivalent __________ relationships whenever possible. - correct answer
binary


When indicating cardinality, the first value represents the _.......................number of
associated entities. - correct answer minimum


Relationships between entities always operate in one direction. - correct answer
FALSE


The conceptual model can handle ______ relationships and multivalued attributes. -
correct answer M:N


Referential integrity and participation are both bidirectional, meaning that they must be
addressed in both directions along a relationship. - correct answer FALSE


A(n) _________ relationship is also known as an identifying relationship. - correct
answer strong


The Crow's foot symbol with two vertical parallel lines indicates ______ cardinality. -
correct answer (1,1)

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