Oracle Database 12c: Advanced Administration — Question 131

Which three statements are true about the startup and shutdown of multitenant container databases (CDBs) and pluggable databases (PDBs)?

Answer options

• A. A PDB opened in restricted mode allows only local users to connect.
• B. When a CDB is open in restricted mode, PDBs must also be opened in restricted mode.
• C. When a CDB is in mount state, PDBs are automatically placed in mount state.
• D. All PDBs must be shut down before shutting down a CDB instance.
• E. When a CDB instance is started, PDBs can be placed in open state by using database triggers or by executing the alter pluggable database command.

Correct answer: B, C, E

Explanation

The correct answers B, C, and E highlight the interdependence of CDBs and PDBs during startup and shutdown processes. Option A is incorrect as it describes restricted mode, which allows only local connections but does not pertain to the relationship between CDBs and PDBs. Option D is also wrong because a CDB can be shut down without shutting down all PDBs first.