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Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following best describes a relational database?

A) A database that uses a tabular structure with rows and columns to represent relationships between data entities
B) A flat file system with no defined relationships between data
C) A database that organizes data hierarchically
D) A database where all data is stored as key-value pairs

2. What happens when the TRUNCATE TABLE statement is executed?

A) Deletes only the last row in the table
B) Deletes the table structure permanently
C) Deletes all rows in the table and logs the operation for rollback
D) Deletes all rows in the table without logging the operation for rollback

3. Which clause in an UPDATE statement typically uses a subquery to assign values to columns?

A) HAVING
B) SET
C) WHERE
D) FROM

4. What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;

A) Only the first names of employees
B) Concatenated first and last names without spaces
C) A syntax error
D) Concatenated first and last names with spaces in between

5. What is the purpose of the DBA_OBJECTS data dictionary view?

A) To show the current session details
B) To provide information about all objects in the database
C) To monitor system performance
D) To list all users in the database

Solutions: