| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 31 | The checkbox that un-checks itself | DOM Events | Multiple choice | Hard |
| 32 | passive listeners can't say no | DOM Events | Multiple choice | Hard |
| 33 | Editing the guest list mid-party | DOM Events | Multiple choice | Hard |
| 34 | The stub that outlived its test | Testing Lifecycle | Multiple choice | Hard |