constructor(private cdr: ChangeDetectorRef) {}
Queues inner observables to run sequentially. Ideal for operations where order matters.
But senior interviews probe deeper: they want to know about Angular's . Angular uses a tree of injectors, allowing services to be scoped at:
Beyond just modularizing code, discuss how lazy loading reduces the initial bundle size and improves the "Time to Interactive" (TTI) metric. 4. Decoding the "Tricky" Questions Decoded Frontend - Angular Interview Hacking %21%21TOP%21%21
By using Signals and the provideZoneChangeDetection( eventCoalescing: true ) or completely bypassing it with provideExperimentalZonelessChangeDetection() , Angular precisely tracks which DOM nodes need updating without checking the whole tree. 2. The Signals Revolution
Understanding Zone.js and ChangeDetectionStrategy.OnPush .
: Distinguish clearly between the constructor (used for DI) and ngOnInit (where data-bound properties are available). 2. Modern Angular "Hacks" (v17+) Angular uses a tree of injectors, allowing services
Angular is a complete rewrite. Highlighting AngularJS experience without acknowledging the differences suggests outdated knowledge.
In Angular 15+, providedIn: 'root' is lazy-loaded, but if you use providedIn: 'platform' , your service survives app re-initialization. Perfect for auth services.
If you use OnPush , Angular only checks inputs that change by . speak to trade-offs
"No. Signals handle synchronous state; RxJS handles async streams. They merge via toSignal() and toObservable() ."
By mastering these 5 domains, you move beyond rote memorization and develop the architectural judgment that companies are desperately seeking in 2026. Prepare intelligently, speak to trade-offs, and go into your interview with the confidence of someone who can truly "decode" the frontend.
Using loadComponent or loadChildren inside your routing configurations to fetch chunks only when a user navigates to that path.
Top-tier candidates don't just build apps; they build fast apps. This is where the "Interview Hacking" truly begins.