Angular 8 Interview Questions and Answers
Angular is one of the foremost frameworks, has released its latest version namely Angular 8 on 23rd of May, 2019. The latest version of Angular is incorporated with unique and attractive features. In general, Angular 8 supports new and unique features such as CLI (Command Line Interface), core framework, and angular material library. Angular 8 Interview Questions contain these important questions and answers. Read them carefully and score well.
| Quick Facts About Angular 8 | |
|---|---|
| What is the latest version of Angular? | Angular 11.0 released on 11th November 2020 |
| When did the Angular 8 release? | 28th May 2019 |
| What language does Angular use? | TypeScript |
| Who is the developer of Angular 8? | |
This is a list of the most frequently asked Angular 8 interview questions and answers. Please have a good read and if you want to download it, it is available in a PDF format so that you can brush up your theoretical skills on this subject.
Most Frequently Asked Angular 8 Interview Questions
In Angular 8, the framework does not interpret components in an incremental DOM. It uses component references instructions, and if it does not refer to a particular instruction, it shall be left unused. Now, VIrtual DOM requires an external interpreter. Hence, not knowing which components to display, everything is shifted to the browser, making the DOM shakeable.
| Real DOM | Virtual DOM |
|---|---|
| DOM is a language-neutral interface allowing programs and scripts to dynamically access and update multiple objects like content, structure, and style of a document. | Is a collection of modules designed to provide a declarative way to represent the DOM for an application. |
| The DOM represents the document as nodes and objects. | A virtual DOM object is a representation of a DOM object, like a lightweight copy. |
| It is an object-oriented representation of a web page, modified with a scripting language like JavaScript. | Virtual DOM is ideal for mobile-first applications. |
The working of typesofchecks in Angular 8 is similar with the enabled and disabled flag, which means if you want to test whether the selected value is an object or not, then the following syntax is used " Typeof value = = = 'object' ". In angular 8 the folwing types of checks are used such as “Typeof value.ngOnDestroy = = = 'function' “.
The angular router in Angular 8 enables rollback the whole object to the next as users perform application work. To present a specific component view a given URL, Angular Router is the foremost service that presents. In order to import an Angular router, it is mandatory to install a library package, @angular/router.