I have only done the first one and it went well! I have not heard back from them but I hope to hear back soon as I really love what Denodo stands for. This interview took place a week ago. Nothing technical was asked at first. It was all about getting to know me and vice versal

Received a screening phone call where the job description was explained to me and was questioned about basic aspects regarding the job title. An in-person interview for two weeks later was set up. The in-person interview was on-site at their Palo Alto office in a conference room with two people at the same time, a service engineer and her manager. Was asked preliminary questions regarding my resume, skills, experience, and interests. Then I was asked several multiple questions related to Java as well as several SQL coding problems. It was a fairly casual atmosphere and they were extremely friendly. Also asked questions regarding day-to-day responsibilities such as traveling and ability to communicate with customers.