Angular 2 Interview Questions

A set of accurately designed Angular 2 interview questions will help you crack the interview. To get acquainted with the questions and their answers which you might encounter during the interview is extremely important. Let us learn about the Angular 2 questions and answers in detail. You can mug up on the given set of questions and answers because even if you do not face the same set, you would be able to answer the questions in relation to them. An overview of the most important concepts will always keep you one step ahead in your interview.

Most Frequently Asked Angular 2 Interview Questions And Answers

In order to put the logical boundaries distinct for any application, models are used in angular JS. Apart from coding it also requires a single build-up for everything in separate modules to differentiate its functionality.

It is made up of the following parts-

  • Bootstrap array- it is used to mention about the components which need to be loaded
  • Export array- in order to export the components it is used along with accessing it for the application
  • Import array- it is used to import the components, pipes or directives.

Every application has it well-defined components where component refers to a logical boundary of the functioning for any application. Also, you would require the layered services that can be utilized to share the same functioning all across the components.

A component in angular 2 consists of-

  • Class- This is similar to Java or C class considering the properties and other methods.
  • Template- This is used for defining the HTML view which gets displayed.
  • Metadata- This is used for class decoration for extending the functionality of it.

Angular 2 offers some of the main advantages as-

  • It was created to facilitate in the mobile application industry.
  • It has absolute browser compatibility supporting the Internet Explorer 9,10,11, Chrome, Safari, Firefox, Android along with Microsoft edge.
  • It is also cross-platform flexible through which developers can formulate various applications running on the desktop systems.
  • It delivers maximum performance as it has a highly optimized subset of JavaScript.
  • It helps in code generation through which template can easily be turned into the code.
  • It is of course cost-effective

Some of the drawbacks of angular 2 are-

  • There are plenty of ways to do a task hence it gets confusing for a newbie
  • Typescript has significance in angular 2 because it has a steep learning curve
  • If you are proficient in angular then learning angular 2 will be a whole new thing
  • It offers slow user interface and Thursday developer has to face major lag
  • It also follows the inconsistent documentation because it has a fragmented community
  • The documentation of angular 2 lacks well-written codes and consistent approaches

The mechanism which allows navigation easier in between multiple views with the help of components and then allows the user to configure it making them more flexible is routing. It also allowed the features by providing lazy loading to facilitate the load times and then increases performance. It is used to achieve-

  • For the creation of modular applications
  • For the state management in any of the application segment

In Angular 2 routing helps to provide a role which is based upon authorization for any of the application and provide access to a large number of users to utilize certain parts of the same application. It is done in the following steps-

  • Creating a module to store the necessary routing path and then defining them along with the routes
  • Important the module for the application by app.module.ts and then adding the routing module name as per the imports of @NgModule
  • Adding the tags of routing selector to the components HTML
  • Adding the router links for easy navigation and to index.html

Ahead of time or AOT refers to the compiler in the sequence of processes rather than compiling them at the run time in the browser. The components are compiled at the built-in time and then converted into native JavaScript followed by HTML.

Advantages:

  • It provides detection for built-in time error and then detects them before running.
  • It also helps in fast rendering

Disadvantages:

  • It requires a cleanup step prior to compiling
  • It only works selectively like HTML and CSS

This is most frequently asked Advanced Angular 2 interview questions and answers.