Protium Interview Questions
The questions to prepare for Protium interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Use CTEs and percentile-style ranking to find the top 5% of customers by 30-day transaction volume within each marketing channel.
Find the longest substring with all unique characters using a sliding window.
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Set a clear north star, supporting KPIs, leading indicators, and guardrails for a new product feature.
Decide how to prioritize competing engineering projects when stakeholders, dependencies, and capacity all conflict.
Design a URL shortening service that routes, ranks, and monitors links at scale.
Explain the difference between precision and recall, and how each reflects a different type of classification error.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Explain how to train and evaluate a classifier when the positive class is rare and accuracy is misleading.