Tableau Software Front End Software Engineer interview questions

Applied online, quick response, did an initial phone interview. Thought the interview went well, and they assigned me coding problems in C or C++. I kicked out the code which was fully unit tested, and waited for a response. After two weeks or so I realized that I wasn't going to get one. Wasn't terribly disappointed - while the visualizations they're building are neat, their software demo is REALLY slow.