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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. Which component of an ERD (Entity-Relationship Diagram) represents the attributes of an entity?

A) Arrows
B) Ovals
C) Diamonds
D) Rectangles

2. Which of the following can be achieved using a correlated subquery?

A) Joining two tables without a common column
B) Comparing each employee's salary to the average salary of their department
C) Inserting data into a table
D) Retrieving duplicate records from a single table

3. How can a synonym benefit database design?

A) It enforces constraints on table columns.
B) It provides a consistent reference to database objects, even if their underlying names change.
C) It allows the renaming of columns in a table.
D) It improves query execution time.

4. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

A) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
B) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
C) Both functions are identical in output.
D) LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.

5. Which statement can be used to undo changes made in a transaction?

A) COMMIT
B) SAVEPOINT
C) MERGE
D) ROLLBACK

Solutions: