I applied for the role in December 2020. I was contacted within 2 weeks after submitting my CV saying that I passed to the 2nd round. I was then given ca 10 days to complete 8 sets of problems. The time is more than enough to complete the questions and I believe that you can ask for an extension, if you need more time. Throughout the process I was always supported by the HR department, who also took the time to tell me why I wasn't selected at the end. Although I did not make it to the final interview, it was a very pleasant experience.