Key Features of Angular
💡 Concept Name
Angular Features – Angular is a TypeScript-based front-end framework with a robust set of features like component-based architecture, CLI tooling, RxJS, and dependency injection that enable scalable, testable applications.
📘 Quick Intro
Angular provides everything needed to build large-scale SPAs, including tools for routing, state management, HTTP communication, testing, and more—all built into a well-integrated development ecosystem.
🧠 Analogy / Short Story
Think of Angular as a Swiss Army knife for front-end development. Instead of needing separate tools for different jobs, Angular gives you one powerful tool that does it all—modularly, cleanly, and efficiently.
🔧 Technical Explanation
- 🧩 Component-Based Architecture: UI is built using reusable components.
- 🧠 TypeScript: Offers type safety and powerful IDE support.
- 📦 Angular CLI: Automates builds, tests, and scaffolding.
- 🔁 RxJS Observables: Enables reactive programming for data streams.
- 🛣️ Routing: Built-in support for SPA navigation.
- 📥 Dependency Injection: Simplifies service management and testing.
- 📐 Modular Architecture: Applications are broken into NgModules.
- ⚙️ Ahead-of-Time (AOT) Compilation: Improves runtime performance.
- 🔒 Security: Built-in XSS protection and content sanitization.
- 🧪 Testing: Comes with tools like Karma and Jasmine for unit testing.
🎯 Purpose & Use Case
- ✅ Build enterprise-scale SPAs with maintainable architecture.
- ✅ Rapid prototyping and production deployment with CLI.
- ✅ Real-time, dynamic apps using RxJS streams.
- ✅ Consistent development practices across large teams.
💻 Real Code Example
// app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
@NgModule({
declarations: [AppComponent],
imports: [BrowserModule],
bootstrap: [AppComponent]
})
export class AppModule { }
❓ Interview Q&A
Q1: What language is Angular based on?
A: TypeScript.
Q2: What is the primary architectural style in Angular?
A: Component-based architecture.
Q3: What is RxJS used for in Angular?
A: Reactive programming using observables.
Q4: What is the Angular CLI?
A: A command-line tool for scaffolding, testing, and building Angular apps.
Q5: What is dependency injection in Angular?
A: A design pattern to inject services into components or classes.
Q6: What is the benefit of modular architecture?
A: It promotes separation of concerns and lazy loading.
Q7: What does AOT compilation do?
A: Converts Angular HTML and TypeScript code to JavaScript before the browser downloads it.
Q8: Does Angular have built-in routing support?
A: Yes, via `@angular/router` module.
Q9: What tools are used for testing Angular apps?
A: Karma and Jasmine.
Q10: How does Angular handle security?
A: With automatic sanitization and prevention against XSS.
📝 MCQs
Q1. What is the architecture style of Angular?
- MVC
- Component-based
- MVVM
- Monolithic
Q2. Which language is Angular written in?
- JavaScript
- TypeScript
- Python
- Java
Q3. What is the purpose of Angular CLI?
- To compile HTML
- To manage databases
- To generate, build, test and serve Angular apps
- To install npm packages
Q4. Which library does Angular use for reactive programming?
- Redux
- RxJS
- NgRx
- ObservablesJS
Q5. What is the purpose of NgModule?
- To declare routes
- To group related code into cohesive blocks
- To create animations
- To bind data
Q6. What is AOT compilation?
- Compilation at runtime
- Compilation before running the app in the browser
- Dynamic module loading
- Style preprocessing
Q7. Which tool is NOT related to Angular testing?
- Karma
- Jasmine
- Mocha
- TestBed
Q8. What is a key benefit of dependency injection?
- Faster CSS
- Global variables
- Decouples service creation from consumption
- Better HTML rendering
Q9. What is true about Angular routing?
- It supports lazy loading
- It is static only
- It works only with MVC
- It’s configured in HTML
Q10. Which Angular file contains module declarations?
- main.ts
- angular.json
- styles.css
- app.module.ts
💡 Bonus Insight
Angular offers seamless integration with backend APIs, strong tooling via VS Code extensions, and community-supported libraries for UI, testing, and form validation. It’s ideal for enterprise-grade applications where scalability and maintainability matter.
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