Overview — Angular Technical Interview Questions & Answers

Overview

Overview

  • Overview in one picture: modules or standalone components, templates, data binding, services, router. You don’t need all of them on day one. Start: one component, one template, one click.
  • Compiler turns templates into JS the browser can run. Change detection walks the tree after events and updates the DOM. That is why (click) feels instant.
  • Meera’s campus app: login route, marks route, MarksService shared. Overview viva = name those four pieces, not a feature list from the marketing site.
  • Trap: reciting Ivy, signals, hydration in the first minute. Say the skeleton first. Advanced words come after a working StudentCard.

Technical Interview Tip: Four pieces: component, template, service, router.

Code Examples for Overview

Overview — working example

import { Component } from "@angular/core";

@Component({
  selector: "app-root",
  template: `
    <h1>{{ title }}</h1>
    <button (click)="toggle()">Toggle</button>
    <p *ngIf="open">Panel open</p>
  `,
})
export class AppComponent {
  title = "Angular practice";
  open = true;
  toggle() {
    this.open = !this.open;
  }
}

Overview: toggle open. Say whether the panel is on screen after one click.

How to Explain Overview to an Interviewer

Sketch Angular’s main pieces.

Component Template / binding Service + router

What does change detection do?

After an event, update the DOM from data