If you would like to prepare further, let me know if you want to dive deeper into , practice mock system design questions , or review Angular component testing strategies . Share public link
on idle : Loads the chunk when the browser enters an idle state.
reduces the check cycles by only triggering when input references change or an event occurs within the component. The Performance Trio: Aim to mention the combination of
“Spot the leak in this component.” Hack answer: Look for missing unsubscription from router events, fromEvent bindings, or setInterval . The fix: private destroy$ = new Subject<void>() and takeUntil(this.destroy$) . decoded frontend angular interview hacking
“I have two child components of the same parent. They both inject a service. Does that service have one instance or two?”
Be prepared to write a functional route guard or HTTP interceptor using the modern function-based approach instead of the deprecated class-based approach. typescript
To truly “decode” the Angular interview, you need to understand what happens under the hood. These topics separate senior from mid‑level. If you would like to prepare further, let
Awesome-Angular GitHub : A massive repository of community-maintained cheat sheets and lists of 100+ interview questions.
Run performance-heavy logic completely outside of Angular's zone using NgZone.runOutsideAngular() . Only re-enter the zone when a visual update is absolutely necessary. typescript
This is usually the make-or-break section. Practice explaining the difference between flattening operators like Advanced Dependency Injection (DI): The Performance Trio: Aim to mention the combination
"How do you handle ? NGRX, NgRx Component Store, Signals, or plain services?"
The cleanest approach. It automatically manages subscriptions and unsubscriptions within the template lifecycle.