Comcast Development Engineer I interview questions

I had 3 rounds in total i was asked about my previous experience and questions were targeted on my projects. They gave me python SQL questions to solve and some questions on AWS

I had 3 rounds , 2 technical and 1 with CDO , and cleared my rounds . But the hiring manager rejected due to my 90 days Notice Period. I already informed them about this notice before the process and once before the last round. They were like it’s fine. It was such a waste of time . Please don’t believe contractors from Comcast. Get a written mail that they are ok with 90 days before proceeding.