Most Asked Angular 7 Interview Questions and Answers
Que 1) What is Angular 7? What do you mean by Angular 7?
Angular 7 is an upgraded version of the Angular Framework developed by Google Inc. The first version of the Angular framework was AngularJS which is also known as Angular 1.0. Angular 7 is a TypeScript based open-source full-stack web application framework which facilitates developers to create real-time quick updating web software and reactive Single Page Applications (SPAs).
Que 2) What was the first version of Angular?
The first version of Angular was Angular 1.0 that is known as AngularJS.
Que 3) How is Angular 7 different from its first version?
Angular 7 is the complete rewrite of the Angular1.0. It is totally different from its first version. It supports two-way data binding, and some other features like ng update, ng add, Angular Elements, Angular Material Starter Components, CLI Workspaces, Library Support, Tree Shakable Providers, Animations Performance Improvements, RxJS v6, Angular Material & CDK, Virtual Scrolling, Improved Accessibility of Selects, now supports Content Projection using web standard for custom elements, and dependency updates regarding Typescript 3.1, Node 10 etc.
Que 4) In which language Angular 7 is written?
Angular 7 is written in Typescript language and completely based on components. It consists of several components which forms a tree structure with parent and child components. Angular’s versions beyond 2+ are generally known as Angular only.
Que 5) In which year Angular was released for industry use?
Angular 7 was released on October 18, 2018 for industry use.
Que 6) What is Angular framework?
Angular framework is a JavaScript framework written in TypeScript language. It is an open-source web framework and a platform. It is used to build fast and reactive web/ mobile and desktop applications.
Main features of this framework are: Declarative templates, dependency injection, end to end tooling etc. These features make web development easy in Angular. Most Asked Angular 7 Interview Questions
Que 7) What is Single Page Application (SPA) in Angular?
A single page application is a web application or a website that provides users a very fluid, reactive and fast experience similar to a desktop application.
It is extremely fast just like desktop applications because it contains menu, buttons and blocks on a single page and when a user clicks on any of them; it dynamically rewrites the current page rather than loading entire complete pages from a server. That’s the reason behind its reactive fast speed.
Que 8) What is the difference between Angular JS and Angular?
Ans: The Angular framework version beyond version 2+ is called Angular while the first version of Angular framework was AngularJS. So Angular is the complete rewrite of AngularJS and totally different. Let’s see the differences between them.
Difference between AngularJS and Angular-
| AngularJS | Angular |
| AngularJS is the common and popular name of the first version of Angular1.0. | Angular is common and popular name of the Angular’s version beyond 2+ |
| AngularJS is a JavaScript-based open-source front-end web framework. It uses JavaScript to build the application. | Angular is a TypeScript-based open-source full-stack web application framework. It uses TypeScript to build the application. |
| AngularJS follows the MVC architecture. | Angular follows the Service/Controller architecture. |
| AngularJS uses the concept of scope or controller. | Instead of scope and controller, Angular uses hierarchy of components as its primary architectural characteristic. It follows Component based UI approach. |
| AngularJS has a simple syntax and used on HTML pages along with the source location. | Angular uses the different expression syntax. It uses “[ ]” for property binding, and “( )” for event binding. |
| AngularJS is a simple JavaScript file which is used with HTML pages and doesn’t support the features of a server-side programming language. | Angular uses of Microsoft’s TypeScript language, which provides Class-based Object Oriented Programming, Static Typing, Generics etc. which are the features of a server-side programming language. |
| AngularJS doesn’t support dynamic loading of the page. | Angular supports dynamic loading of the page. |
Que 9) What is the difference between structural directive and attribute directive in Angular 7?
Structural directives are used to alter the DOM layout by removing and adding DOM elements. These directives are far better in changing the structure of the view. Examples of Structural directives are NgFor and Nglf.
Attribute Directives are used as characteristics of elements. For example, a directive such as built-in NgStyle in the template Syntax guide is an attribute directive.
Must Read: Most asked Angular Interview Questions
Que 10) What is the difference among Angular 7, Angular 6, Angular 2, and Angular 1 or AngularJS?
Ans: Angular 7 vs Angular 6 vs Angular 2 vs Angular 1 or AngularJS
Angular1 was initially released in 2010. It was the first Angular version. It created a revolution in the web application development. It was a browser side JavaScript which was used within HTML code. It is popularly known as AngularJS.
Angular 2 was a complete rewrite of Angular 1. It was initially released in 2016. There is nothing common between Angular 2 and Angular 1 except the core developer’s team. Angular 2, Angular 6 and Angular 7 are very similar to each other. Angular 7 is the latest most popular version. It contains the extensive features of Angular 2 and Angular 6. These versions are known as Angular.
Most Asked Angular 7 Interview Questions
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