Background Processes and I/O

From 9i Self Test ...

Which 4 background processes perform I/O? (Choose 4)

• DBWn
• ARCn
• PMON
• SMON
• CKPT
• LGWR

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  I thought they all did, except CKPT which tells DBWn to do it, and PMON which only works with memory structures.

Their answer was all except SMON and PMON. In reality, none of them do I/O because they call OS library routines to do the actual I/O. This is why I don't have a chance in hell of passing this test, because too many answers depend on how you consider the question. ;-)

Any comments? Received on Sat Dec 20 2003 - 19:22:45 CST