Top K Frequent Elements and Amazon Top-K Variants

Also reported as LeetCode 347 · Catalog Top K

CodingAmazonLast reported October 2026High Frequency

Reported: 13× across candidate reports
First seen: October 2025
Last reported: October 2026
Reported outcome: mixed

Problem Overview

The round: LeetCode 347, Top K Frequent Elements, is the most common form, reported in onsite rounds, phone screens and intern loops from late 2025 to autumn 2026, often with an Amazon framing on top. Interviewers move from the first answer to a better one: one intern wrote brute force…

6 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
The rest of the problem statement — full requirements, constraints, and edge cases
Approach and trade-offs — what passing candidates did, and the mistakes that sink people

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Verified Source

Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.

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Technical claims, formulas, and scale numbers are reviewed against primary sources.

Interviewer Follow-ups

The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.