Which background process is not started up by default when you start up the Oracle instance?
1. DBWn
2. LGWR
3. CKPT
4. ARCn
Answer 4 : ARCn is the archiver process, which only started when LOG_ARCHIVE_START = TRUE in the initialization parameters. The default processes are DBWn, LGWR, CKPT, SMON and PMON.
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