Google Technical Program Manager interview questions

Interview process was very smooth. Got a call after 3 days of submitting my application. Had a phone interview, one interview through Google hangouts and then 1 on-site interview. Didn't get an offer but the experience was great. The whole process took 3 weeks. Phone screening was very easy. Standard project management questions. The on-site interview was a bit difficult but this was expected. They check both critical thinking and technical skills (i.e., software skills).