Estimation question

How many computers does LinkedIn have?

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

Tests estimation skill: breaking a company scale question into a defensible headcount based calculation with clearly stated assumptions.

Start from LinkedIn's approximate employee count, stating this as an assumption since exact figures are not something you would know precisely.
Estimate computers per employee, likely more than one per person accounting for laptops plus desk monitors or secondary devices.
Add server and infrastructure computers separately, since a tech company runs many machines beyond employee devices.
Combine employee devices and infrastructure into a rough total, showing the arithmetic clearly.
Sanity check the number against a comparable company's known scale if possible.
State clearly that this is a rough order of magnitude estimate, not a precise figure.

States a clear starting assumption, for example an employee count in the tens of thousands, since LinkedIn is a large but not the largest tech employer.
Assumes roughly 1.2 to 1.5 computers per employee, accounting for laptops plus some employees having an additional desktop or testing device.
Adds a separate estimate for servers and data center infrastructure, noting this could be a comparable or larger number than employee devices.
Shows the full arithmetic clearly and states plainly that the final figure is a rough estimate, not a claimed precise fact.

Giving a single guessed number with no shown reasoning or stated assumptions behind it.
Forgetting to separately account for server and infrastructure computers beyond employee laptops.

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