問題文
A container database is restarted for maintenance. The root opens without error, but the application teams report that none of their pluggable databases can be reached. Which statement explains this behavior?
選択肢
- Opening the root opens the pluggable databases in read only mode first, and the teams were most likely blocked by write statements that the read only mode refused during the restart of that container database instance.
- Opening the root opens the pluggable databases in the same step, and the teams were most likely blocked by a listener that had not registered the services again after the restart of that container database.
- Opening the root rebuilds the service definitions of those pluggable databases, and the teams were most likely blocked by service names that changed while the container database was being restarted.
- Opening the root does not open the pluggable databases, so they stay mounted until an explicit command opens them or a state saved earlier tells the container database to open them automatically during its own next startup.