Estimation question

How would you analyze the performance of Facebook in country X vs. country Y?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Whether the candidate can structure a cross-market comparison using a consistent set of normalized metrics rather than raw totals.

Clarify what 'performance' means: user growth, engagement (DAU/MAU ratio), monetization (ARPU), or all three, since each tells a different story.
Normalize for population and internet penetration differences between the two countries before comparing raw user counts.
Compare engagement quality using DAU/MAU ratio and average session time, rather than just total registered users.
Compare monetization using ARPU, accounting for differences in ad pricing and purchasing power between the two markets.
Segment the comparison by product surface, such as Feed versus Reels versus Marketplace, since a country might over- or underperform on specific features.

Normalizes for population and internet penetration before comparing user counts, avoiding a misleading raw-number comparison.
Uses DAU/MAU as an engagement-quality metric rather than relying on total user counts alone.
Segments by product surface, since aggregate country performance can mask very different behavior on different features.

Comparing raw user or engagement totals without normalizing for population size or internet penetration.
Treating performance as one number instead of breaking it into growth, engagement, and monetization.

How would you adjust the comparison if one country has much lower smartphone penetration?
What would explain strong engagement but weak monetization in one of the two countries?