Google

Very easy if you know data structures and algorithms very well, plus creative thinking and some knowledge of system design. You are good to go. They mainly focus on data structure and algorithm questions and how well and optimized a solution you can

Applied through online application. Resume shortlisting. The shortlisted candidates attended a 15-minute phone call discussion. Next round was Technical Interview 1. After that, Technical Interview 2. Final round was HR round.

Introductory Call -> Screening Round -> 4 technical rounds -> 1 Googliness round. If you performed not so well in the screening round but they didn't reject you outright, they might offer a few more months of prep time to reappear for the screening