Binary Search on Sorted/Log Data

Phone ScreenSnowflakeLast reported July 2026Medium Frequency

Reported: 5× across candidate reports
First seen: April 2025
Last reported: July 2026
Reported outcome: mixed

Problem Overview

A collection of coding problems centered on binary search, observed in Snowflake phone screens. The most concrete variant: given a log history containing three types of log entries — Info, Warn, and Error — each prefixed with its type (e.g., '[Info] ...', '[Warn] ...', '[Error] ...'), find the index of…

3 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.

Codex Fact-Checked

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.