WGU C170 Data Management Actual preparation test exam with Thorough and Correct answers Updated 2024/2025
5 views 0 purchase
Course
WGU 170
Institution
WGU 170
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 ...
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)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller KieranKent55. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
