Google's interview process is arguably the most structured and heavily documented in the tech industry, designed to eliminate bias and find candidates who thrive in extreme ambiguity. Their legendary evaluation framework rests on four pillars: General Cognitive Ability (GCA), Role-Related Knowledge (RRK), Leadership, and 'Googleyness'. While technical thresholds are incredibly high (especially for SWE roles requiring flawless data structures and algorithms knowledge), the behavioral bar is equally stringent. GCA interviews test how you solve novel problems in real-time without domain expertise, while 'Googleyness' evaluates your comfort with ambiguity, bias to action, and collaborative nature. They do not want 'lone geniuses'; they want intellectually humble builders who can scale solutions for billions of users.