Q141. Which three actions are performed by Database Upgrade Assistant (DBUA)?

Q141. Which three actions are performed by Database Upgrade Assistant (DBUA)? (Choose three.)

• A. It recompiles all stored PL/SQL code by using utlrp.sql.
• B. It empties the RECYCLE BIN.
• C. It performs prerequisite checks to verify if the Oracle database is ready for upgrade.
• D. It sets all user tablespaces to “read-only” before starting the upgrade.
• E. It removes the AUDSYS schema and the AUDIT_ADMIN and AUDIT_VIEWER roles
• F. It increases tablespace size, if required, to meet upgrade requirements.