WGU D427 - Data Management Applications – PreAssessment Questions And Correct Answers

WGU D427 - Data Management Applications –
PreAssessment Questions And Correct Detailed
Answers



San Francisco, CA 94110
USA
How many attributes are present in the address fragment?
-1
-2
-3
-4
4


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


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.




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.


Which query illustrates performing an outer join of the Movie table with a
different table?
- SELECT M.Title, A.Actor FROM Movie M, Actor A
WHERE M.ActorID = A.ID
- SELECT M.Title, A.Actor FROM Movie M
LEFT JOIN Movie MB ON M.ID, Actor A
- SELECT M.Title, A.Actor FROM Movie M
RIGHT JOIN Actor A ON M.ActorID = A.Id
- SELECT M.Title, A.Actor FROM Movie M
INNER JOIN Actor A ON M.ActorID = A.ID

, SELECT M.Title, A.Actor FROM Movie M
LEFT JOIN Movie MB ON M.ID Actor A




Assume there are two tables, A and B.
Which rows will always be included in the result set if Table A is inner joined with
Table B?
- Only rows in Tables A and B that share the join condition
- all rows in Table B
- All rows in Table A
- Only rows in Tables A and B that do not share the join condition
Only rows in Table A and B that share the join condition


1. Portland, OR 97212
How many attributes are present in the address fragment?
-1
-2
-3
-4
3


2. The Patient table has the following columns:
first_name varchar(20)