Lazy loading defers the loading of JavaScript bundles until the user actually navigates to a particular route. Instead of downloading everything upfront, the application loads only what’s needed for the initial view, then fetches additional feature modules on demand.
: Explain Resolution Modifiers ( @Self , @SkipSelf , @Optional , @Host ) and the Lightweight Injection Token Pattern for tree-shaking.
Mention makeStateKey to ensure type safety. This proves you ship production-scale apps.
Prevents the application from crashing if a dependency is not found, returning null instead. Decoded Frontend - Angular Interview Hacking %21%21TOP%21%21
Templates should be declarative—just bindings and simple transformations. Complex calculations belong in the component class, memoized with pure pipes or computed signals.
A key part of decoding the frontend involves writing clean, declarative RxJS code instead of imperative, nested blocks. Declarative Streams vs. Imperative Subscriptions
When an asynchronous event finishes, Zone.js tells Angular to run change detection from the root component down to the leaf components. Lazy loading defers the loading of JavaScript bundles
In massive applications, running change detection across the entire component tree for every minor event causes noticeable performance drops. The OnPush Strategy
"Write a directive that conditionally renders a template except twice."
Change detection is manually requested using ChangeDetectorRef . typescript Mention makeStateKey to ensure type safety
Knowing when and how to implement OnPush change detection and using lazy loading effectively.
import Component, OnInit from '@angular/core'; import CommonModule from '@angular/common'; import HeroService from './hero.service';
Angular 17 introduced a new block-based control flow syntax that replaces structural directives:
An Angular developer who can’t talk about signals, standalone components, or the new control flow syntax immediately appears out of touch. Stay current. The framework evolves rapidly.
However, Zone.js comes with performance costs—it triggers change detection more often than necessary. (available in Angular 20+) removes Zone.js entirely, relying on Signals and manual triggers instead. Senior candidates should explain: