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WGU Data Management – Foundations Sample Questions:

1. Which statement uses valid syntax for the DELETE statement in SQL?

A) DELETE table_name WHERE condition;
B) DELETE * FROM table_name WHERE condition;
C) DELETE FROM table_name WHERE condition;
D) DELETE FROM table_name;

2. Which command is used to filter group results generated by the GROUP BY clause?

A) HAVING
B) WITH
C) REPLACE
D) WHERE

3. Which operation finds an entry containing a search value by repeatedly splitting the index in two?

A) Binary search
B) Table scan
C) Fan-out
D) Index scan

4. How many bytes of storage does a BIGINT data type hold in MySQL?

A) 8 bytes
B) 1 byte
C) 3 bytes
D) 4 bytes

5. What is the role of the transaction manager within the database system architecture?

A) The transaction manager logs insert, update, and delete queries, and the result is sent back to the application.
B) The transaction manager translates the query processor instructions into filesystem commands and uses an index to quickly locate the requested data.
C) The transaction manager uses information from the catalog to perform query optimization.
D) The transaction manager is composed of a query processor, storage manager, transaction manager, log, and catalog.

Solutions: