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WGU D426 Pre- Assessment ( 2026/2027 Update) Data Management Foundations Exam Questions and Answers
WGU D426 Pre- Assessment ( 2026/
2026 Update) Data Management Foundations
Exam Questions and Answers
Correct
Q: What is another name for a subquery?
Answer:
Nested query
Q: Which operator is used to compare against a list of values when determining a match in a
WHERE clause?
Answer:
IN
Q: Which wildcard character is used to represent zero or more characters when searching for a
specified pattern using a LIKE operator?
Answer:
%
Q: Which function is considered an aggregating function in SQL?
Answer:
MIN
Q: Which clause or function is used with aggregate functions to produce summary rows?
Answer:
GROUP BY
Q: Which type of join returns only the matching values when selecting rows from two or more
tables?
Answer:
Inner Join
Q: Which join type selects only matching left and right table rows?
Answer:
Inner Join
Q: Which phrase refers to the view in which data is persisted and is automatically changed as
the underlying data is changed?
Answer:
Materialized View
Q: Which SQL command uses the correct syntax to update the salary of an employee in the
Employee table?
Answer:
UPDATE Employee SET Salary = 50000 WHERE ID = 1;
Q: What describes elements such as column name and data type?
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