Doing “well” and doing “poorly” on the assessment is more a matter of how much of a fit a person is for the particular job they are applying to. Each person can be a good fit for a job, depending on what the requirements of the job are.
This question is often asked in reference to the problem-solving questions in the assessment. Those questions have right and wrong answers.
The odds of getting all questions correct by accident is 1 in 244,140,625 million. So, it is very unlikely someone can get the answers correct by fluke.