There was a written test. If you pass the written test, you will be invited to the competency-based interview. It took around 45 minutes with 3-6 questions. You can prepare some experience in advance to match the competency in the job vacancies of UNOPS.

before the interview one must go through a written test, which you will need to choose a date and time yourself. on the day for the written test you need to be on time as the time given is not enough.