Reverse Linked List / Pairs Reverse

Phone ScreenRobinhoodLast reported April 2025Low Frequency

Problem Overview

Given a singly linked list, first reverse it entirely (e.g., 1→2→3→4 becomes 4→3→2→1). Follow-up: reverse every two…

1 candidate-reported follow-up — 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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Interviewer Follow-ups

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