Multiple choice technology databases Which one is not mandatory background process ? DBWn (Writes the dirty buffers to datafiles) LGWR (writes the redo log buffer data to online redo log files) CKPT (An Event that flushes the modified data in buffer cache to disk and updates the controlfile and datafile) ARCn (Copies online redo log file to another location before they are overwritten) Reveal answer Fill a bubble to check yourself D Correct answer Explanation ARCn (Archiver process) is optional - databases can run in NOARCHIVELOG mode without archiving. However, DBWn, LGWR, and CKPT are mandatory background processes - DBWn writes dirty buffers, LGWR writes redo, and CKPT manages checkpoints.