Decoded Frontend - Angular Interview Hacking %21%21top%21%21 [top]

| Problem | Operator | Why it wins | | :--- | :--- | :--- | | Cancel pending HTTP requests | switchMap | Prevents race conditions in search bars. | | Run parallel requests | forkJoin | Like Promise.all for Observables. | | Get both old + new value | pairwise | Perfect for form dirty-checking. | | Debounce user input | debounceTime | Stop firing API calls on every keystroke. | | Handle errors gracefully | catchError | Don’t let one failed request crash the UI. |

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When reviewing architectural design patterns in an interview setting, structure your answers around these engineering goals: Decoded Frontend - Angular Interview Hacking %21%21TOP%21%21

: By default, Angular checks components from top to bottom. ChangeDetectionStrategy.OnPush limits checks to components whose @Input() references have changed or where an event originated, drastically reducing CPU usage. Signals: The Modern Reactive Paradigm | Problem | Operator | Why it wins

To pass a modern Angular interview, you must show proficiency in three core areas: Change Detection, RxJS/Reactivity, and Performance Optimisation. Change Detection & Zones | | Debounce user input | debounceTime |

: Limits the search to the host component of the current view. Provider Scopes

: Best practices for Smart vs. Dumb (Presentational) components and efficient data flow using Directives and Pipes