Recruiter contacts me. It took 2 weeks.Interview questions are not hard.

I applied online, and few days after, the HR email me to schedule a phone interview date with the interviewer, the first scheduled time nothing happen, so I scheduled another time, then the next time, the phone call came as expected, they only ask me some very simple questions such as what's the difference between java and C++, most of time I talking about my project which the interviewer seems interested in on it too. All seem going smoothly, however, two weeks later, I was told that the position was already filled.