A.You cannot export data from a remote database.
B.You can rename tables during an import operation.
C.You can overwrite existing dump files during an export operation.
D.You can compress the data during export but not the metadata because it is not supported

A.The checkpoint frequency decreases with the smaller redo log file size.
B.It ensures that all committed data is written to the data files during normal shutdown.
C.The frequent full checkpoint in a database can cause the overall degradation of the database performance.
D.It prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the onlineredo log files