Estimation question

How much app related data does the Google iOS app store transmit each month?

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

Estimation reasoning about data transfer volume from user behavior and app metadata size.

Break the estimate into components, number of monthly active app store users, actions per user, e.g. searches, page views, and downloads, and data size per action.
Estimate monthly active users of the app store, anchored to a known scale of iOS users globally, marked as an assumption.
Estimate actions per user per month, e.g. average searches, listing views, and screenshots loaded per session.
Estimate data size per action, a listing page with screenshots and metadata might be a few hundred KB to a few MB.
Multiply users by actions by data size per action to reach a total monthly data volume.
State the final estimate with a clear range and flag every input, users, actions, and data size, as an assumption.

Breaks the estimate into three explicit components, users, actions, and data size per action, rather than guessing a single number.
Anchors each component to a plausible real world reference, e.g. hundreds of millions of iOS users globally.
Shows the full multiplication chain to arrive at a total, e.g. terabytes or petabytes per month.
Sanity checks the final figure against plausibility for a company operating at Apple's scale.

Giving a final number with no visible calculation.
Not accounting for images and screenshots, which dominate data size versus text metadata.
Skipping a sanity check on the final order of magnitude.

Chapters of the AI PM course that teach what this question tests.