Change detection is explicitly invoked via ChangeDetectorRef.markForCheck() . Going Zoneless

Strategies for optimizing bundle sizes (lazy loading routes, deferrable views using @defer , and tree-shaking).

RxJS and Angular Signals form the backbone of reactive programming in modern frontend architectures. You must know when and how to leverage both. RxJS vs. Signals

Senior roles demand knowledge of how code scales. Be ready to discuss the following design patterns: Content Projection ( )

Practice converting imperative code into reactive streams.

This operator comparison is a classic Angular interview question. Each serves a distinct purpose:

: Ideal for asynchronous operations, event streams, data fetching, and complex data transformations over time.

You don’t need to know every operator. You need to know to solve 90% of async problems:

Know the common operators intimately: map , filter , tap , switchMap (crucial for API calls), mergeMap , concatMap , and catchError .

Don't just say you would use a Signal; explain why it outperforms an observable for local component state.

Modules ( NgModule ) are legacy. Modern Angular interviewers expect you to build applications using standalone components, directives, and pipes. Be prepared to explain how standalone architecture simplifies lazy loading, reduces boilerplate, and alters the compilation pipeline. 3. Cracking the Performance & Change Detection Questions