Metric Counter

Problem Overview

Design a system for collecting, aggregating, and monitoring metrics (e.g., counters for local activities and operations). The scope ranges from a local library that supports metric collection and aggregation (e.g., for use within an application) to a distributed metric counter system. In some variants the problem is simplified to counting…

• 5 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