It can have different steps, but they always do a personal experience, a test and at least one case with an assesment where they test your ability to analyze the market, competitors, product performance...

Met with an HR responsible who asked me some general questions about myself, what I knew about the company and my studies. Then I was introduced to an analytical test regarding prices, products, etc. I had 15-20 minutes to calculate things (they provide paper, pen and calculator).