#angular practices

Do you want to ace an interview with full marks? Don't have time to read everything about Angular? Read our top interview questions for Angular best practices, which will help you answer theoretical and Angular practical questions. 

What is Angular?

Angular is a JavaScript-based front-end web application framework designed to create applications to make them easy to test, maintain and extend. It uses HTML as the view layer and JavaScript as the application logic layer.

1. What are the technologies used in Angular?

Angular is a web application framework created and maintained by Google. It is used to develop applications that run on the client-side, server-side, or both.

Angular is built on top of TypeScript, a superset of JavaScript that adds type checking and static type definitions for variables and expressions. Angular also uses the Web Components standard to build reusable UI components.

Some of the other technologies used in Angular are TypeScript, RxJS, Webpack, ES6+, Webpack Dev Server. 

2. What is Angular mainly used for?

Angular was first released in 2016, and it has been gaining popularity ever since. The framework allows developers to build single-page applications with the help of JavaScript and HTML. It also provides a set of tools that can be used for building reusable components, routing, animations, data binding, directives, and more. It is mainly used in different fields such as web development, mobile development, or even machine learning.

3. What is the difference between Angular and AngularJS?

Angular is a JavaScript-based framework that allows web developers to build mobile and desktop applications. AngularJS is a subset of Angular that focuses on client-side application development.

The main difference between Angular and AngularJS is that Angular uses TypeScript while AngularJS uses JavaScript. This means that the code written in TypeScript will be compiled into JavaScript automatically by the compiler, which helps improve the code's performance and maintainability.

4. What do you mean by data binding in Angular?

Data binding is a process by which data changes in the model are automatically updated in the view. The term "data binding" comes from its first use, when it was used to bind values to DOM elements. Still, we now use it more generally to describe any automatic updating mechanism that uses data from one component to update another.

Data binding can be implemented through events or expressions. In Angular, we use expressions for data binding because they are concise and provide flexibility over events.

5. What is the scope in Angular?

A scope is a powerful tool of Angular. It allows developers to define the visibility of a component in a particular view. A scope has two main components - controllers and directives. Controllers are the objects that define how your application should behave, while directives are the objects that dictate how your application should look like.

6. What are directives in Angular?

Angular directives are one of the most important concepts in Angular. They are used to extend the functionality of Angular applications and enhance their capabilities. Directives allow us to create custom components that can be reused in our application. They also provide a way to reuse code across different parts of our application by encapsulating it within a directive. Directives are not just limited to Angular, and they can be used in any web-based framework like React or Vue. 

7. What is server-side rendering in Angular?

Server-side rendering is a technique that renders the HTML of a web application on the server and then reverts it back to the client. This enables web applications to be delivered faster.

Server-side rendering is an important technique for making Angular apps more performant and scalable. Angular apps typically have a lot of UI components, which are rendered on the client-side. These components are not rendered with server-side rendering until the user requests them. This makes the app load faster and can be scaled better because it won't have an extra load on the server when it's not needed.

Server-side rendering is used in conjunction with other techniques such as lazy loading, service workers, and prerendering to make your Angular app much faster than before.

8. What is an Angular Router?

Angular Router is an AngularJS library that provides a routing system for the application. It allows us to promptly and easily create navigation between views or pages in our AngularJS app.

Angular Router is commonly used by UI developers who have built complex applications with multiple screens, including single-page apps (SPA) or hybrid mobile apps with web views.

9. What is the digest cycle process in Angular?

The digest cycle process in Angular is when a component or module needs to update itself and its dependencies after changes have been made to its code. The process starts with Angular's change detection mechanism that triggers updating any component or module that has changed since the last time it was updated.

The digest cycle process in Angular also involves updating any dependent modules and components triggered by change detection and updating any registered services and observables.  

Wrap Up 

So, these were the top Angular-based interview questions you should learn for Angular best practices and ace your interview with full marks. However, these questions are limited to interviews and help you deal with practical problems while developing apps.