I say show me the money or skills in this case.
We have slc,micrologix,plc 2,plc 5,controogix,compactlogix,ad 205,305,405 and siemens s5,s7, and omron trainers with pushbuttons lights ,valves,ac drives and hmi's.
We ask what equipment they have programmed if they say any of these then we let them show us some example circuits.
We have them program about 10 different circuits and sometimes this takes 2 days to complete some only one day which is a good indicator.
They start out simple like a on/off motor start circuit to changinf multiple valuse in the plc through the hmi.
It is real funny to see the looks on some faces when they tell you "oh i program plc 5 all the time with my eyes closed" and they spend 2 hrs trying to get online via df1 how hard is that?
As others posted earlier their are many people that know enough lingo to bs their way into a position but making them do it and show you that it works seperates the men from the boys and the bs from the real deal IMHO.