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> Because correct me if I'm wrong, but the majority of interview questions are based on CS 101

AFAIK, they actually send out a prep-sheet which recommends experience with not only big-O and simple algorithms, but knowing how search algorithms compare, dijkstra's algorithm, A*, graphs, trees, networks, http, combinatorics, etc.

I'm not sure which CS 101 you took, but to me that's not 101 stuff. They definitely expect a candidate to know nearly all of what you'd learn in an entire typical CS program.