If by “effective” we mean “deny most everyone” then yeah it’s very much so. If we mean “hire people right for the job” then no one actually knows this because a

If by “effective” we mean “deny most everyone” then yeah it’s very much so. If we mean “hire people right for the job” then no one actually knows this because a test would require control group. I would argue that if some leetcoding and other rote can make a significant difference it’s probably not effective.