To answer this question, you need to understand the concept of Flashback Technology in Oracle Database.
Flashback Technology is a feature in Oracle Database that allows you to view and manipulate past data and database states. It provides a way to recover a database or a table to a previous point in time without the need for performing a complete database restoration.
Based on the given options, the two operations that can be flashed back using Flashback Technology are:
C. DROP TABLE EMPLOYEES - This option is correct because when you drop a table using the DROP TABLE statement, you can use Flashback Technology to recover the dropped table and its data. By using the FLASHBACK TABLE statement, you can restore the dropped table to a previous point in time.
D. DROP USER SMITH - This option is correct because when you drop a user using the DROP USER statement, you can use Flashback Technology to recover the dropped user and its objects. By using the FLASHBACK DATABASE statement, you can restore the dropped user and its objects to a previous point in time.
Therefore, the correct answer is C. DROP TABLE EMPLOYEES and D. DROP USER SMITH. These options can be flashed back using Flashback Technology.