@ygp, interview were pretty normal two phone screens one HR, one semi Tech, went to Tier 1 school so after 10 minutes they figured what I don't know, I would figure out by next day. My Physics Prof (Nobel winner) said all we teach is where to look and who to ask. LoL. The In person interviews were more how to approach problems, how to manage project slips, intergration, testing methods. Normal stuff, give very few Pat answers, mostly it depends on x, y and z strong on fast iterations, collecting data. Typical Eng 101. They asked some os, hw, caching stuff pretty standardard. A few times, I said I don't know (which was true and they knew I did not know), but here is how I would learn, start the process. Typical optimazation issues, nothing magical
Still think I was lucky since not a exact fit.
Good luck to all, it's scary and hard. But getting in front of people is first step. Also re do your resume for each job, first f2f I redid my resume as I understood what they valued. Follow up same day/next day offering to answer any questions/follow up and propose two time slots. Nearly everyone responded, usually just thanking me for touching base.
I got to the point where I had questions and tactics some worked well others not so. At Google the Director level guy I asked how long is he been trying to fill the need he looked up at ceiling and said 3 or 4 months. I replied what I don't know I could learn in 6 weeks I said any comptent Engineeer. He smiled said yes compotent. I think that put me in contention
Good luck to all, be flexiable. Think of the pain on the other side of table not fun hiring.