Diagnosed as rod bearings for knocking sound on start up on 1999 Toyota Celica

when car is started it makes a loud knocking sound, one guy said rod bearings need to be replaced.

Asked by for the 1999 Toyota Celica
is it just on start up or all the time?? did the tech do a manual oil pressure check??

on start up and i don't think there was an oil pressure check done on the car.