I applied online. I interviewed at Optival in Jan 2020
Interview
Nice talk with HR, regular questions about your background, what did you do in your last position, etc. Then got a home assignment. Don't waste your time on the assignment.
Interview questions [1]
Question 1
Don't waste your time on the assignment. The assignment's requirements may seem flexible, but it seem only. Only the person who wrote this mission knows what he means... a lot of missing details you have to guess.