This is a poorly worded question. Rasmussen states that there are skill-based, rule-based and knowledge-based errors.

He then goes on to state that there are ‘routine’ and ‘exceptional’ violations or intended deviations from the plan.

In terms of strict terminology answer ”routine errors” is what the examiner is looking for but answer “handling errors” could be construed to be an acceptable answer and would be worth an appeal if this question turned up in a UK exam.