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Group Anagrams is a medium coding interview question covering strings, hash maps, sorting — the kind asked at FAANG (Facebook/Meta, Apple, Amazon, Netflix, Google) and AI-first companies like Anthropic, OpenAI, and Nvidia.
Given an array of strings, group the anagrams together. Two strings are anagrams if one is a rearrangement of the other. Return the groups in any order.
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