physical components of oracle database are control files,redo log files and datafiles.

Control file: control file is read in the mount state of database. control file is a small binary file which records the physical structure of database which includes

• database name
• names and locations of datafiles and online redo log files.
• timestamp of database creation
• check point information
• current log sequence number.

Redo log files: This files saves all the changes that are made to the database as they occur. This plays a great role in the database recovery.

Datafiles:datafiles are the physicalfiles which stores data of all logical structure.