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What would you build in your first 90 days on this team?

Offer a first-90-days plan with useful early work and clear decision points. Let the team’s evidence and constraints determine the deliverable.

Updated Sep 2026 · Learn how AI infrastructure works through explanations, worked examples and diagrams, then practise applying it to interview questions.

Offer a first-90-days plan with useful early work and clear decision points. Let the team’s evidence and constraints determine the deliverable.

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The concepts behind this question

Use these concept explanations to review the ideas behind this question.

Advanced

🧭 Ownership & Judgment🔒 Premium

Leveling Signals: Senior vs StaffEngineering levels describe scope and responsibility, but the boundaries vary by company. Explain the decisions you owned, the teams affected and the lasting changes you helped make so an interviewer can assess your experience.

Foundational

🧭 Ownership & Judgment

Deciding Under Incomplete InformationWhen evidence is incomplete, compare the cost of waiting with the cost and reversibility of acting. Record the assumptions, the observation that would change the decision, and who will respond if it occurs.

Advanced

🧭 Ownership & Judgment🔒 Premium

Your View on Where AI Infrastructure Is GoingA useful industry view makes a specific prediction, explains the evidence behind it and identifies what would change your mind. Separate a forecast from an established fact, and keep numerical arguments within their stated assumptions.

Foundational

🧮 Open Weights & Serving Engines

Capacity Planning for Open-Weights FleetsMatch forecast traffic to a measured replica operating envelope, then check failure domains, rollout capacity, readiness time and cost. Output tokens alone omit prompt work and live state; total parameter count alone does not determine a replica's throughput.

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UP NEXT ON YOUR JOURNEY

Next in this trackTell me about an isolation or access problem you found before anyone else did.Next in this trackYou can see that capacity will fall short in four months. How do you tell leadership?Next in this trackWhere do you think AI infrastructure is going over the next five years?

FEDITOR'S NOTE

Look for a conditional plan, proportionate early delivery, useful measurement and explicit dependencies.

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