which background process will start first when the instance is started?(PSP0) in oracle 10g & 11g

today I got a question from Oracle dba group which background process will start first when the instance is started? (When considering in oracle 10g)

Many of them gave the answer is "smon" but it was the wrong answer one of the group members answered psp0 (PROCESS SPAWNER) then I searched on google about PSP process and here we can see about PSP(PROCESS SPAWNER) process.

kindly check the link below


https://ampersandacademy.com/tutorials/oracle-admin-1/psp0-process-label-name

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