| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | Event loop machine: sync, a timer, and a promise | Event Loop & Memory | Runtime machine | Easy |
| 2 | Event loop machine: a .then chain vs a timer | Event Loop & Memory | Runtime machine | Medium |
| 3 | Event loop machine: what await actually does | Event Loop & Memory | Runtime machine | Medium |
| 4 | Event loop machine: microtasks cutting the line | Event Loop & Memory | Runtime machine | Hard |