🧒 Explain like I'm 5
Imagine you have a huge book with lots of pictures. You want to look at the pictures one by one without the book getting too heavy or slow. You need to find a way to see each picture quickly and smoothly, even if there are thousands of them.
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Detailed notes
Senior-level deep dive: internals, pitfalls, and a self-interview ladder.
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Answer out loud, get scored on correctness, depth, and clarity.
