You can rate custom questions on a scale from 1-5 by clicking the star icons on a candidate's results page. In the same way, you can also rate the candidate overall.
Go to "My assessments," select the relevant assessment, then click on the candidate you want to rate.
On the candidate's results page, scroll down to the list of his or her answers to your custom questions. By clicking the icon in the "View answer" column, you'll be able to view the detailed answer for each question.
After reviewing an answer, click on a star rating to rate it. If you want to give a rating of 4 out of 5, for instance, you'd click the fourth star from the left.
After reviewing the test results, the anti-cheating monitor, and the custom questions, you can provide an overall rating to the candidate using the star ratings at the bottom of the candidate's results page. This overall rating also appears on the overview page of all your candidates that took part in the assessment.