# Angular Fundamentals (Angular)

> Components, templates, data binding, structural directives, ngFor, ngIf, interpolation, property binding, event binding

- 20 interview questions
- Junior
- [Interview Questions: Angular](https://sharpskill.dev/en/technologies/angular/interview-questions.md)

## 1. What is a component in Angular?

**Answer**

A component is a fundamental building block of an Angular application that controls a portion of the user interface. It combines an HTML template, CSS styles, and a TypeScript class with the @Component decorator. This architecture enables creating reusable and modular interfaces, promoting separation of concerns between the view and business logic.

## 2. Which syntax displays a TypeScript variable in the template?

**Answer**

Interpolation with double curly braces {{ variable }} inserts dynamic values into the HTML template. Angular evaluates the TypeScript expression and converts the result to a string displayed in the DOM. This syntax is used to display component properties, perform simple calculations, or call methods that return values.

## 3. How to bind an HTML property to a component variable?

**Answer**

Property binding with brackets [property]="variable" binds a DOM element property to a TypeScript expression. Angular evaluates the expression and updates the property automatically when changes occur. This syntax is one-way (component to template) and applies to standard HTML attributes, custom properties, or child component inputs.

## 17 more questions available

- Which syntax captures a user event in the template?
- What does the *ngIf directive do in an Angular template?

Sign up for free: https://sharpskill.dev/en/login

## Other Angular interview topics

- [TypeScript Basics](https://sharpskill.dev/en/technologies/angular/interview-questions/typescript-basics.md): 25 questions, Junior
- [TypeScript Advanced](https://sharpskill.dev/en/technologies/angular/interview-questions/typescript-advanced.md): 20 questions, Junior
- [Components & Lifecycle](https://sharpskill.dev/en/technologies/angular/interview-questions/components-lifecycle.md): 20 questions, Junior
- [Services & Dependency Injection](https://sharpskill.dev/en/technologies/angular/interview-questions/services-dependency-injection.md): 20 questions, Junior
- [Angular Modules Organization](https://sharpskill.dev/en/technologies/angular/interview-questions/modules-organization.md): 22 questions, Mid-Level
- [Angular CLI](https://sharpskill.dev/en/technologies/angular/interview-questions/angular-cli.md): 18 questions, Junior
- [Directives & Pipes](https://sharpskill.dev/en/technologies/angular/interview-questions/directives-pipes.md): 22 questions, Mid-Level
- [Routing & Navigation](https://sharpskill.dev/en/technologies/angular/interview-questions/routing-navigation.md): 24 questions, Mid-Level
- [Reactive Forms](https://sharpskill.dev/en/technologies/angular/interview-questions/forms-reactive.md): 26 questions, Mid-Level
- [Template-driven Forms](https://sharpskill.dev/en/technologies/angular/interview-questions/forms-template-driven.md): 16 questions, Mid-Level
- [RxJS Fundamentals](https://sharpskill.dev/en/technologies/angular/interview-questions/rxjs-fundamentals.md): 22 questions, Mid-Level
- [RxJS Operators](https://sharpskill.dev/en/technologies/angular/interview-questions/rxjs-operators.md): 24 questions, Mid-Level
- [HttpClient & API Calls](https://sharpskill.dev/en/technologies/angular/interview-questions/http-client.md): 22 questions, Mid-Level
- [Basic State Management](https://sharpskill.dev/en/technologies/angular/interview-questions/state-management-basics.md): 20 questions, Mid-Level
- [Change Detection](https://sharpskill.dev/en/technologies/angular/interview-questions/change-detection.md): 20 questions, Mid-Level
- [Angular Signals](https://sharpskill.dev/en/technologies/angular/interview-questions/angular-signals.md): 20 questions, Mid-Level
- [Standalone Components](https://sharpskill.dev/en/technologies/angular/interview-questions/standalone-components.md): 18 questions, Mid-Level
- [Angular Unit Testing](https://sharpskill.dev/en/technologies/angular/interview-questions/testing-unit.md): 22 questions, Mid-Level
- [End-to-End Testing](https://sharpskill.dev/en/technologies/angular/interview-questions/testing-e2e.md): 18 questions, Mid-Level
- [Build & Optimization](https://sharpskill.dev/en/technologies/angular/interview-questions/build-optimization.md): 20 questions, Mid-Level
- [NgRx Fundamentals](https://sharpskill.dev/en/technologies/angular/interview-questions/ngrx-fundamentals.md): 24 questions, Senior
- [NgRx Advanced](https://sharpskill.dev/en/technologies/angular/interview-questions/ngrx-advanced.md): 24 questions, Senior
- [Angular Architecture](https://sharpskill.dev/en/technologies/angular/interview-questions/angular-architecture.md): 22 questions, Senior
- [Performance Optimization](https://sharpskill.dev/en/technologies/angular/interview-questions/performance-optimization.md): 22 questions, Senior
- [Security & Best Practices](https://sharpskill.dev/en/technologies/angular/interview-questions/security-best-practices.md): 20 questions, Senior
- [Advanced RxJS Patterns](https://sharpskill.dev/en/technologies/angular/interview-questions/advanced-rxjs-patterns.md): 22 questions, Senior
- [Angular Universal & SSR](https://sharpskill.dev/en/technologies/angular/interview-questions/angular-universal-ssr.md): 20 questions, Senior
- [Angular Micro-frontends](https://sharpskill.dev/en/technologies/angular/interview-questions/micro-frontends-angular.md): 20 questions, Senior

---

Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack.
HTML version of this page: https://sharpskill.dev/en/technologies/angular/interview-questions/angular-fundamentals