Top Angular 2 Interview Questions and Answers - Essential Guide for Job Seekers
To survive in the modern industry and to earn a very good salary, learning only JavaScript programming language is not sufficient, you must move on to learning JavaScript Frameworks also i.e., Angular. It doesn’t matter if you are thinking to start your career in software development or are already a software developer, you will always find Angular 2 Interview Questions useful. This is an open-source component-based UI framework that is written in TypeScript and is mainly used in building web, mobile, and desktop applications in HTML and JavaScript. Angular is an evolved and upgraded version of Angular JS and is invented by Google. For writing codes, Angular provides many language choices like Typescript, Dart, ES5, ES6. It supports both data and property blinding which allows a user to control DOM i.e., Data Object Model by binding class and HTML properties.
| Quick Facts About Angular 2 | |
|---|---|
| What is the latest version of Angular? | Angular 14 released on 2nd June 2022 |
| When did angular 6 release? | 14th September 2016 |
| Who is the developer of Angular 2? | |
| What language does Angular use? | TypeScript |
| License | MIT License |
| Official website | https://angular.io |
Frequently Asked Angular 2 Interview Questions for Developers
They are additionally called lambda features in different languages. Using fats arrow (=>) we drop the want to use the 'function' keyword. Parameters are handed in the angular brackets <>, and the characteristic expression is enclosed inside the curly brackets {}.
items.forEach((a) => {
console.log(a);
incrementedItems.push(a+1);
});
An IDE’s main purpose is to provide a friendly coding environment. Angular 2 supports the following code-editors which are highly efficient:
- Visual Studio Code
- Sublime Text
- Atom Editor
- Webstorm
- Angular IDE
- ALM IDE
- Brackets
- Vim Editor
| Declarations | entryComponents |
|---|---|
| Used to make Directives including components and pipes within a specific module | Used to register components for offline computation in a module |
| Directives, components, and pipes are matched against the HTML only if they are declared or imported | Components used for router config can be added implicitly |
In Angular 2, Bundling is known as the process of joining/combining multiple files into one single file. Third Party-libraries and other dependencies are generally bundled into a module for increasing productivity of code.
The <base href="/"> in Angular 2 is to direct the Angular Router to the static part of a URL. It helps the router to differentiate and make modifications to the URL accordingly.
The subscribe() function is observable in Angular 2 which defines how to obtain or generate values or messages to be published. To execute a particular observable in a timely fashion, you will have to create notifications using the subscribe() method.
An entry component in Angular is one that loads imperatively, i.e it can be loaded without any referenced in the template, by any type or category. One can specify an entry component by either bootstrapping it as a NgModule or even in a routing definition.
With application users being across the globe nowadays, Internationalization in Angular is used to simplify the process of designing and preparing your app for multiple languages.
Angular Material Design is an open-source framework that can be used to build highly scalable mobile and commercial apps. There is no requirement of a license for usage. The main aim of Material Design is a unified version of visual, motion and interaction design over multiple devices.
To simplify the process of development in Angular 2, Angular UI is used which is a stack of modules written in Angular.js to provide more flexibility to the code. Having a wide variety of modules, you can use the UI for various declarations like components or pipes individually.
- Angular Interviews are not just about learning Java Concepts but one of the toughest questions is to know about software and system designs.
- Practice is the key factor to crack any type of interview. Angular interviews are no exception too.
- You should know about basics such as TypeScript, Services, Metadata, Components, etc.
- If you know about the answer but you are taking too much time to explain it, then that land you nowhere. So yes, Time Yourself i.e. answer your question within a time limit.
- Teach a concept to your friend or anyone which you have learned. By this, you will know if you learn that concept.
- Honesty is the best policy. If you don’t know the answer just admit it without wasting the interviewer and your time.