Practice with the full bank, then narrow into a path.
Your active path is foundations track, but the catalog stays broad by default so you can spot harder reps, switch contexts quickly, and still return to the path that best matches your current goal. Starter includes 160 free problems and marks 94 Pro-only problems before you open a gate.
Start broad, then focus when you want structure.
Company labels help frame practice in a familiar business context. They are directional study aids, not official interview guidance from the companies listed. We keep all paths visible first so hard questions do not disappear.
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DoorDash
Foundations Track
Stockout Days by Warehouse
The inventory team wants to know which warehouses experienced stockouts in July 2024. Return warehouse_id and the number of stockout_days where units_on_hand...
DoorDash
Foundations Track
Duplicate Delivery Role Posts
Delivery operations wants a monthly cleanup report for employers that recycled the same role posting. Looking only at April 2024, return one value named empl...
DoorDash
Foundations Track
Frequent Support Callers
DoorDash is reviewing frequent support callers through a operations review. Return the distinct policy_holder_id values for members who made at least 3 calls...
DoorDash
Foundations Track
Creators With Multiple 2024 Posts
DoorDash is reviewing creators with multiple 2024 posts through a coverage report. Return each creator_id that posted at least two items in 2024. Sort by cre...
DoorDash
Foundations Track
2024 App Click Volume
DoorDash is reviewing 2024 app click volume through a monthly brief. Return each app_id and the total number of click events recorded in 2024. Sort by app_id.
DoorDash
Interview Core Track
Monthly Reactivated Users
DoorDash wants a planning note for monthly reactivated users. Count how many users logged in during a month after being inactive in the previous month. Retur...