Cheat Sheet
| Question | Core Idea | Senior Signal |
|---|---|---|
| Q106 | Prototypes | Property lookup checks own properties, then walks the prototype chain. |
| Q107 | Descriptors | Properties can be writable, enumerable, configurable, data-based, or accessor-based. |
| Q108 | Classes | Class syntax still shares methods through prototypes and should be weighed against composition. |
| Q109-Q110 | Protocols and promises | Iteration and promises are protocol-driven language features with scheduling implications. |