Automatic response with a schedule "IQ" test to even get to the first interview stage. No follow up until a month+ later when I was called to book in a first interview. By that time I'd moved on long ago.

Got sent a logical patten recognition test. No human contact at all. 18 questions in 15 minutes. The patterns are not overly difficult to find, but if you're not used to this kind of tests the time-limit will get you. Never received any response back after completing the test.