Mastering Angular 2: Top 20 Interview Questions and Answers for 2024

The world of web development is constantly evolving, and Angular has emerged as one of the most prominent frameworks for building dynamic and responsive applications. As businesses continue to embrace the power of Angular, the demand for skilled Angular developers is on the rise. If you’re preparing for an Angular 2 interview, you’ll want to be well-versed in the framework’s core concepts, features, and best practices. In this comprehensive guide, we’ll explore the top 20 Angular 2 interview questions and provide insightful answers to help you ace your next interview.

1. What is Angular 2?

Angular 2 is a powerful open-source framework developed by Google for building web applications. It is a complete rewrite of the original AngularJS framework and is designed to simplify the development process of large-scale, high-performance applications. Angular 2 leverages TypeScript, a superset of JavaScript, and focuses on improving performance, simplifying development, and enhancing code maintainability.

2. What’s the difference between AngularJS and Angular 2?

While AngularJS and Angular 2 share some similarities, there are several key differences:

• Language: AngularJS uses JavaScript, while Angular 2 primarily uses TypeScript, a statically-typed superset of JavaScript.
• Architecture: Angular 2 has a component-based architecture, while AngularJS follows the Model-View-Controller (MVC) pattern.
• Rendering: AngularJS uses a regular DOM, while Angular 2 utilizes a faster and more efficient rendering technique called Shadow DOM.
• Dependency Injection: Angular 2 has a built-in dependency injection system, making it easier to manage dependencies and promote code reusability.
• Performance: Angular 2 is generally faster and more performant than AngularJS, thanks to its improved rendering process and better utilization of resources.

3. What are the main advantages of Angular 2?

Angular 2 offers several advantages over other frameworks and its predecessor, AngularJS:

• Mobile-Friendly: Angular 2 was designed with mobile applications in mind, making it easier to develop responsive and performant mobile apps.
• Browser Compatibility: Angular 2 supports a wide range of browsers, including Internet Explorer 9 and above, Firefox, Chrome, Safari, and mobile browsers.
• Cross-Platform Flexibility: Angular 2 allows developers to build applications that can run on various platforms, including desktop systems, web browsers, and mobile devices (Android and iOS).
• High Performance: Angular 2 utilizes a highly optim