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Exam (elaborations)

WGU D427 Data Management – Applications Pre-Assessment

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Prepare for the WGU D427 Data Management – Applications Pre-Assessment with this focused study resource. Review key database concepts, relational database design, SQL statements, data manipulation, queries, table structures, and database management principles. Reinforce your understanding of how to retrieve, insert, update, and organize data while practicing essential skills relevant to the course. Use this resource to identify knowledge gaps, revisit challenging concepts, and strengthen your readiness for the pre-assessment. It complements official WGU course materials, learning resources, and hands-on SQL practice.

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San Francisco, CA 94110
USA
How many attributes are present in the address fragment?


-1
-2
-3
-4




4




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The Package table has the following columns:
Weight—decimal
Description—optional variable length string
LastChangedDate—date
TrackingNumber—integer
Which column should be designated the primary key for the Package table?


- Weight
- Description
- LastChangedDate
- TrackingNumber


Tracking Number


Which data type will store "2022-01-10 14:22:12" as a temporal value without loss of information?


- DATE
- DATETIME
- DECIMAL
- BIGINT


DATETIME




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Which SQL command is an example of data definition language (DDL)?


- UPDATE
- ALTER
- SELECT
- DELETE


CREATE, ALTER, OR DROP


How would a database engine process an update that violates a RESTRICT referential integrity constraint?


- The offending value would be set to the database default.
- The update would be rejected by the database.
- The offending value would be changed to NULL.
- The updated value would flow to the primary key.


The update would be rejected by the database.




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Which restriction applies when using a materialized view?


- The users of the view must provide search terms.
- The underlying data must be periodically refreshed.
- The tables referenced in the view must be indexed.
- The rows in the table must be compressed.


The underlying data must be periodically refreshed.




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