Angular 7 Interview Questions
Top 10 Angular 7 Interview Questions and Answers
Angular 7 Interview Questions
Angular 7 interview questions typically cover a wide range of topics such as Angular basics, components, modules, services, directives, dependency injection, pipes, and Angular CLI. Common interview questions may inquire about the differences between Angular 6 and Angular 7, RxJS observables, lazy loading, forms handling, unit testing, performance optimization, and best practices in Angular development. Interviewers may also ask candidates about their experience with Angular Material, animations, routing, and state management using libraries like NgRx. It is important for candidates to have a good understanding of the latest features and updates in Angular 7 to confidently answer these questions during the interview.
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1 - What is Angular 7 and what are its key features?
Angular 7 is an open source web application framework maintained by Google. It is used for building single page web applications. Angular 7 comes with various features such as improved application performance, better error handling, CLI prompts for dynamic configurations, and support for TypeScript 3.1 and Node 10. The addition of virtual scrolling in Angular 7 helps in efficiently rendering large lists. Additionally, Angular elements allow developers to use Angular components in non Angular environments.
2) What is the Difference between Angular 6 and Angular 7?
One of the main differences between Angular 6 and Angular 7 is the introduction of CLI prompts in Angular 7, which allow developers to set up projects with dynamic configurations. Angular 7 also comes with enhancements in the form of improved application performance, better error handling, support for TypeScript 3.1, Node 10, and virtual scrolling for rendering large lists.
3) What is AOT compilation in Angular and how does it benefit an Angular application?
AOT (Ahead of Time) compilation in Angular involves compiling the application at build time, rather than at runtime. This results in smaller bundle sizes, improved performance, and increased security as template syntax errors can be caught during the build process. AOT compilation also helps in identifying errors early in the development phase, leading to a more stable application.
4) How does Angular 7 facilitate lazy loading of modules and why is it important?
Lazy loading in Angular 7 allows developers to load only the required modules when navigating to different routes, improving initial load time and overall performance of the application. By lazy loading modules, unnecessary code is not loaded upfront, leading to faster loading times and a better user experience. Angular 7 makes it easier to implement lazy loading through the use of loadChildren method in the route configuration.
5) What are Angular Elements and how can they be used in Angular 7 applications?
Angular Elements in Angular 7 enable developers to package Angular components as custom elements, which can then be used in non Angular applications. This allows for the reusability of Angular components across different frameworks and technologies. By creating Angular elements, developers can encapsulate functionality within individual components, making them portable and easily integrable into various projects.
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