Angular has moved away from the heavy architecture of NgModule . Standalone components declare their own dependencies directly. This flat structure makes tree-shaking far more effective, reducing initial bundle sizes by stripping out unused framework code and utilities. 6. Enterprise Security and Guard Patterns
Best for asynchronous event streams, debouncing user input, polling, and complex API orchestration. decoded frontend angular interview hacking
This is the most popular senior question. Explain that ChangeDetectionStrategy.OnPush improves performance by only checking the component when inputs ( @Input() ) change (reference check) or when events occur inside it. Angular has moved away from the heavy architecture
. While beginners are asked "what" a component is, seniors are asked "why" a specific design choice was made. 1. The "Signals vs. Observables" Debate In 2026, the shift toward is a primary interview topic. Explain that ChangeDetectionStrategy
Live coding interviews often feature RxJS challenges. Memorizing these three operator distinctions will save your live coding score: Behavior on New Emission Best Use Case Cancels the previous inner observable. Search typeaheads (drops old pending HTTP requests). mergeMap Runs all inner observables concurrently. Deleting multiple items where order does not matter. concatMap Queues inner observables and runs them sequentially. Database saves where sequential order is critical. 🔒 Security and Route Guarding
Don't just say DI is for sharing data. Explain that Angular's hierarchical dependency injection allows for scoped services (e.g., singleton services in AppModule vs. scoped services in component providers).