Oracle OCP 19c 认证1Z0-083考试(第36题) - #全网独家#19c OCP

Posted 2021-07-09 itsaka

 

Q36

Which two are true about Oracle Flashback features? (Choose two.)

• A. FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
• B. FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
• C. FLASHBACK TABLE can undrop a column.
• D. FLASHBACK DROP can undrop an index when undropping a table.
• E. After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.

 

DE

 

 

A, B are Wrong. Flashback Query & Version Query need Undo not Redo C is Wrong. D is Correct. Assuming that an index is not dropped before dropping a table. E is Correct