WGU D427 Data Management
Applications Pre - Assessment (Latest 2026
/ 2027 Update) Questions & Answers
{Grade A} 100% Correct
Which data type will store "2022-01-10 14:22:12" as a temporal value without loss of
information?
- DATE
- DATETIME
- DECIMAL
- BIGINT - Correct answer DATETIME
Which SQL command is an example of data definition language (DDL)?
- UPDATE
- ALTER
- SELECT
- DELETE - Correct answer 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. - Correct answer 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. - Correct answer 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 - Correct answer 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 - Correct answer
Only rows in Table A and B that share the join condition
Portland, OR 97212
How many attributes are present in the address fragment?
-1
-2
-3
- 4 - Correct answer 3
2. The Patient table has the following columns:
Applications Pre - Assessment (Latest 2026
/ 2027 Update) Questions & Answers
{Grade A} 100% Correct
Which data type will store "2022-01-10 14:22:12" as a temporal value without loss of
information?
- DATE
- DATETIME
- DECIMAL
- BIGINT - Correct answer DATETIME
Which SQL command is an example of data definition language (DDL)?
- UPDATE
- ALTER
- SELECT
- DELETE - Correct answer 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. - Correct answer 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. - Correct answer 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 - Correct answer 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 - Correct answer
Only rows in Table A and B that share the join condition
Portland, OR 97212
How many attributes are present in the address fragment?
-1
-2
-3
- 4 - Correct answer 3
2. The Patient table has the following columns:
