Find top-k frequent elements efficiently

Q: Find top-k frequent elements efficiently

This is a Coding & Algorithms interview question from Apple for Software Engineer roles. View the full question and solution on PracHub.

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Question

Given an array (or stream) of integers and an integer k, return any ordering of the k most frequent values. Implement a solution using a heap and discuss how you would handle ties, negative numbers, very large n, and streaming updates under memory limits. Analyze time and space complexity and outline an alternative bucket-based approach.

Find top-k frequent elements efficiently

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