| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | Microtask starvation | Event Loop & Memory | Multiple choice | Hard |
| 2 | Find the leak-proof cache | Event Loop & Memory | Multiple choice | Hard |
| 3 | Drag the output: timers scheduling timers | Event Loop & Memory | Drag & drop | Hard |
| 4 | Event loop machine: microtasks cutting the line | Event Loop & Memory | Runtime machine | Hard |