Angular Basic Interview Questions
Top Angular Interview Questions for Beginners
Angular Basic Interview Questions
Angular basic interview questions typically revolve around topics such as the Angular framework, components, data binding, services, directives, modules, routing, and dependency injection. Interviewers often ask candidates to explain the differences between AngularJS and Angular, discuss the component lifecycle hooks, describe the purpose of NgModule, and demonstrate knowledge of TypeScript fundamentals. Understanding concepts like observables, HTTP requests, form validation, and unit testing in Angular is also important. Being able to provide clear examples, demonstrate problem-solving skills, and showcase practical experience in building Angular applications can greatly benefit candidates in their interviews.
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1 - What is Angular?
Angular is a popular open source front end web application framework developed by Google. It is used to build robust and dynamic single page applications. It makes use of TypeScript, a superset of JavaScript, for building web applications. Angular provides a structured framework that follows the Model View Controller (MVC) architecture, making it easy to develop and maintain complex web applications.
2) Explain the difference between AngularJS and Angular.
AngularJS is the first version of Angular, introduced in 2010. It uses JavaScript to build web applications and follows the Model View Controller (MVC) architecture. On the other hand, Angular, also known as Angular 2+, is a complete rewrite of AngularJS and was released in 2016. Angular uses TypeScript, supports more modern web development practices, and offers enhanced performance and features compared to AngularJS.
3) What is a component in Angular?
In Angular, a component is a basic building block of an application that controls a part of the user interface. It is typically used to create custom elements and encapsulate functionality and styling specific to that component. Components consist of a TypeScript class, an HTML template, and a CSS file, making it easier to maintain and reuse code across different parts of the application.
4) What is data binding in Angular?
Data binding in Angular allows the synchronization of data between the component and the view. There are two types of data binding in Angular: one way data binding, where the data flows from the component class to the template, and two way data binding, where changes in the view are also reflected back in the component class. Data binding simplifies the development process by automatically updating the view when the data changes.
5) What is a service in Angular?
A service in Angular is a reusable piece of code that performs specific functionality or shares data across components. Services are used to abstract logic from components, making the code more modular and easier to test. Services are typically injected into components or other services using Angular's dependency injection system, enabling better code organization and separation of concerns.
6) How does routing work in Angular?
Routing in Angular allows the navigation between different parts of the application without reloading the entire page. Angular's built in router helps define routes and map them to specific components, allowing users to navigate through the application by changing the URL. Routing also enables lazy loading of modules, improving the performance of the application by loading only the required components when needed.
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