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Google·Product Manager·Onsite - Product Sense / Strategy·Intermediate

IntermediatePrefer not to say
May 2026

Summary

Got a product estimation question at Google that sounds breezy until you actually have to structure it on the spot. One question, pretty classic format, nothing too wild but it requires you to have a real opinion and back it with numbers.

Questions Asked (1)

Q1

What is your favorite international airport, and estimate its daily arrivals and departures?

Product Analytics & MetricsProduct Sense & Ideation
Author's notes

The 'favorite' part threw me off more than the estimation.

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AI HintsAI Generated

Suggested Approach

Pick a well-known international airport you can describe with genuine enthusiasm, then structure your estimate by breaking down daily operations into arrivals and departures using a top-down approach. Show your work by stating assumptions clearly and sanity-checking the final number against known facts like annual passenger traffic.

Pro tip: Choose an airport you actually know something about (e.g., you've flown through it or read about its operations) so your enthusiasm feels authentic, and always round your final estimate to a clean number while acknowledging the margin of error.

1. Choose and justify your favorite airport

Name a major international airport and briefly explain why it's your favorite (e.g., efficiency, design, experience). Keep it personal and concise to set a positive tone.

2. Clarify the scope and define terms

State that you'll estimate total daily aircraft movements (arrivals + departures) and specify whether you're including both passenger and cargo flights. This shows analytical rigor.

3. Estimate using a top-down approach

Start with known or estimated annual passenger traffic, divide by average passengers per flight, then divide by 365 to get daily flights. Split evenly between arrivals and departures.

4. Sanity-check and refine

Cross-check your estimate against runway capacity (e.g., number of runways, operations per hour) or known daily flight counts to ensure plausibility. Adjust if necessary.

5. Summarize and state assumptions

Present your final estimate clearly, reiterating key assumptions (e.g., load factor, aircraft size) and acknowledging that actual numbers may vary.

Key Points to Mention

  • Annual passenger traffic of the chosen airport (e.g., ~80 million for Heathrow, ~100 million for Atlanta)
  • Average passengers per flight (e.g., 150-200 for narrow-body, 300+ for wide-body)
  • Load factor (e.g., 80-85% typical for major airlines)
  • Number of runways and their capacity (e.g., 2 runways can handle ~100 movements per hour)
  • Seasonal or daily fluctuations (e.g., peak days vs. average)
  • Cargo flights as a separate category if relevant

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.