Scenario Based Angular Questions

Question1>>>    Users report slow interactions in a large data grid. How would you diagnose and fix this?

ANS.(Approach: Virtual scrolling, trackBy, OnPush change detection, and Web Workers for heavy computation.)

Question2>>>>>    An app’s SSR (Angular Universal) page renders correctly but client-side hydration fails. What could cause this?

ANS  (Debugging: Mismatched DOM states, direct DOM manipulation, or async operations in ngOnInit.)

Question3>>>>>  Explain the new @defer block in Angular 17. How does it improve performance?

(Answer: Deferred loading of components/templates based on viewport, interaction, or timers.)

Question4>>>>   What are Signals in Angular? How do they differ from RxJS Observables?

ANS (Key points: Fine-grained reactivity, effect(), computed(), and interoperability with RxJS via toSignal/toObservable.)

What Interviewers Look For:

• Deep Framework Knowledge: How Angular works under the hood (Zones, Ivy, DI).

• Problem-Solving: Trade-offs between different approaches (e.g., NgRx vs Services).

• Performance Focus: Bundle optimization, change detection tuning, lazy loading.

• Modern Practices: Signals, standalone components, SSR, and reactive patterns.