The performs recovery when a failed instance starts up again ........

Computer GK Operating systems

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The ________ performs recovery when a failed instance starts up again.

Log Writer(LGWR)

Checkpoint(CKPT)

System Monitor(SMON)

Process Monitor(PMON)

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Explanation:

PMON and SMON are two required background processes.
PMON is the Process Monitor which is responsible for recovering processes when the user process fails.
PMON does the process cleanup.
SMON is the System Monitor which is responsible for recovering the system after a failure.