Data files of which tablespaces can be recovered by performing an open recovery?

In viewing information about undo which view is useful for monitoring the effects of transaction execution on undo space in the current instance?

Which two operations can be flashed back using the Flashback technology?

Which two statements about Flashback Query are true?

The switch operation waits for transactions in the old undo tablespace to commit?

In the following which is the default permanent tablespace?