Mentioned that there are three type of knowledge required, Domain, Technical and Engeering Best Practices , of which the third is what I can contribute right from day one, technical will take very little to come up to speed with their tool set, but domain expertise will take the most time. I think that made a good impression and turned it into a positive experience. They did not go deep into technical because I was already very experienced and was expected to pick up things rather quickly, which I did. I am glad they showed maturity of not grilling with silly technical questions which either are elementary or something one ca google any way.