Q19. Which three are true in Oracle 19c in later releases?

Q19. Which three are true in Oracle 19c in later releases?

1. Tablespaces always remain in read/write mode during transportable tablespace operations.
2. Simultaneous data pump jobs can be limited at the pluggable database (PDB) level.
3. A transportable data pump import can leave a plugged-in tablespace in read/write mode.
4. An ordinary data pump export of a table with encrypted columns will always encrypt the same columns when imported.
5. Tablespaces never remain in read/write mode during transportable tablespace operations.
6. A transportable data pump import can leave a plugged-in tablespace in read-only mode.