Closed-book card for day 86. This file is the interviewer. It is not a worked example.
Do not open the day 85 kit lesson as a design template while this timer is running. Do not scroll past the attempt barrier on the day 86 page. This is not a news-feed fan-out lesson and not a CDN brand tour.
Design an article serving system.
Readers open a public article by id or slug. Authors publish and update articles. Some articles are extremely hot. A reader who opens an article shortly after a publish should not keep seeing the previous body forever.
You have 35 minutes. Blank page. No notes.