Yahoo Software Engineer interview questions

Dropped my resume at the campus career fair and got invited to dinner in the same day by the recruiting team. At dinner I talked to a group manager who was very interested in my PhD work. A week later I was invited to on-site interviews, no phone screening. Three on-site with three different groups. Regular interview coding questions except may be for one interview where the interviewer asked me how to design a large scale website (in the scale of Twitter). It took them about weeks to get back to me with an offer.

Applied online. Your typical 3 rounds of interviews total. Phone, followed by 2 in house interviews. Team and work environment seems friendly and nice. However, interview process was extremely long and they never make their decision deadline. They always make up excuses for why the process is delayed and why they need more time. Interview process took close to 3 months now and according to them I am at the committee review final stage. However, its been almost 3 weeks since they told me that and a decision is still not out. They will constantly tell you that you are their top candidate to keep you from dropping out but don't trust them. I had other pending offers that I gave up for Yahoo and I deeply regret not taking them now. Will not interview with them again. Don't trust HR's words, and take your other offers when you have the chance.