DoorDash Business Model & Trade-offs Questions
Analysis of DoorDash's business model within a platform-based marketplace context, including revenue streams (delivery fees, commissions, subscription), cost structure (logistics, driver incentives), partnerships, pricing strategies, market expansion decisions, and the strategic trade-offs between growth, profitability, and delivering value to customers.
MediumTechnical
0 practiced
Design a data-driven incentive program to increase driver supply during the dinner peak in a mid-sized city. Specify required data inputs, the target metrics you would optimize (accept rate, active drivers, average delivery time), candidate incentive structures (per-trip bonus, guaranteed earnings, streak bonuses), budget constraints, an experiment plan to measure effectiveness, and rollout considerations including fraud prevention.
MediumTechnical
0 practiced
Given an events table orders(order_id, user_id, city, status, created_at, accepted_at, completed_at, cancelled_at), write a SQL query using window functions to compute the distribution of 'time to accept' (accepted_at - created_at) per city and the median per hour-of-day. Exclude canceled orders and handle nulls sensibly; explain edge cases your query accounts for.
HardSystem Design
0 practiced
Design an attribution system to credit marketing channels (ads, promotions), restaurant partners, and referral sources for orders that may have multiple touches and delayed conversions. Discuss data collection requirements, choices between rule-based, model-based, and game-theoretic (Shapley) attribution, handling offline conversions, computational scaling, and how to validate the system against randomized experiments.
MediumBehavioral
0 practiced
Describe a time you worked with product and operations teams to deploy a model that directly affected frontline workers (e.g., drivers). Explain how you ensured operational constraints, worker fairness, legal/regulatory considerations, and reliability were incorporated into the development and rollout process, and how you measured post-deployment impact.
HardTechnical
0 practiced
Outline a data-driven competitive analysis plan comparing DoorDash to major competitors like Uber Eats and Grubhub. Specify metrics to compare (pricing, delivery time, restaurant coverage, app ratings), potential external data sources (app store rankings, web-scraped menus/prices, traffic and mapping signals), modeling approaches to infer local market share changes, and recommended actions DoorDash could take based on the findings.
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