Week 10 · Day 6 · 2026-10-03 SAT · MOCK · core plus two full follow-ups
Adaptive mock: Uber 45m plus Tinder and Local Delivery pressure rounds
今日目标
Run a 45-minute Uber mock with two dives, then shorter Tinder and Local Delivery follow-ups.
| 08:50-09:00 | Set target Choose the hardest current risk: stale location or dispatch race. |
|---|---|
| 09:00-10:05 | Uber live mock 45m Staff mock: candidate drives, interviewer picks two dives based on answer. |
| 10:05-10:45 | Pressure rounds Tinder 25-35m and Local Delivery 25-35m compressed follow-ups. |
| 10:45-10:55 | Spoken close Record lowest dimension and one repair sentence. |
| 14:30-16:15 | NeetCode Tag · Intervals Exactly three contiguous slots; each slot is 30m solve + 5m evidence. |
| 20:30-21:15 | Recall / Mock 20:30-21:15 Re-attempt the weakest five-minute segment with new failure injection. |
Live canonical source anchors
Daily anchors retain the original Hello Interview heading text.
今天不新增 Hello Interview 小节；复用 Week 10 已核验 anchors 做 mock 和 repair。
DDIA decision links
| Week 10 decision | Exact DDIA subsection | Design consequence |
|---|---|---|
| Which Week 10 paths require strong order and which remain projections? | Ch10 - 共识的实践 | Ride assignment, match pair creation, and inventory reservation need a single transition order; map pins/feed/availability are derived projections. |
Algorithm block
| Slot | Problem | Pattern | Invariant | Bug risk | Time | Space |
|---|---|---|---|---|---|---|
| 16 | My Calendar I NEW · 30m solve + 5m evidence | ordered conflict check | A booking is valid only if predecessor ends <= start and end <= successor start. | Boundary equality. | O(log n) if tree | O(n) list |
| 17 | My Calendar II NEW · 30m solve + 5m evidence | double-book intervals | New booking cannot overlap an existing double-booked segment. | Create double segments before validating. | O(n^2) | O(n) |
| 18 | Count Days Without Meetings NEW · 30m solve + 5m evidence | merge busy intervals | Free days equal total days minus union length of busy days. | Inclusive length end-start+1. | O(n log n) | O(1) extra |
Output and repair
| Deliverable | Mock score sheet with Uber two dives, Tinder follow-up, Local Delivery follow-up, lowest-dimension repair target. |
|---|---|
| Repair rule | If scoring is generic, attach evidence to invariants, state machine, freshness, race recovery, and SLIs. |
| Artifacts | Live Mock Scorecard mock evidence |
| English recall | English recall: defend freshness, reservation, race recovery, fairness, and observability without reading notes. |
Detailed lecture notes, audio, recall scripts, PDFs, Staff Q&A, and mock packs are archived locally and are intentionally not published on this site.