swissQuant Junior Java Developer interview questions

They got in touch with me twice in different hiring process. In the very first one, they ditched me out after asking me for my CV. After asking for a feedback I guess they looked closer my CV and then send a coding challenge to complete in the next week. They didn't like my response. The second time, I got a phone call with the CEO. Friendly and informal one, to get know each other, motivation, background, etc... He gave me a positive feedback then, talking about the next steep. Few days after I got an email from the hiring team saying they won't move forward with my application. From my perspective, not a very professional hiring process.