It lasted for around 20 minutes. I was interviewed by three prf.'s who work on the project. I received the invitation email after one month after the application deadline. Around a month later, or a bit more, I asked for an update. But unfortunately, it was not positive. The bright side was: the application required uploading a research proposal, but even though I did not submit it, and did not have strong experience and knowledge on the topic, I received an invitation for the interview, and was the first one to be interviewed among the selected candidates.