Quite friendly - ceo is approachable and talk in very good manner. The interview question is to assess your capability and passion to work in start up environment, so just be yourself
With ceo - explain why you want to work here and what is your expertise. How can you solve general problem. The interview is quite general. You need to have real ambition and describe clearly on your skills and why you want to work here
Interview questions [1]
Question 1
What is your expertise related to digital marketing tools