AngularJS Interview Questions for Aspiring Developers

Over recent years, AngularJS has managed to create a huge amount of career opportunities, which generated (still does!) a lot of attention towards this framework. With the growing interest, more and more employers are starting to implement Angular into their workspaces. This means that AngularJS interview questions and tips for boosting your confidence and chances during the interview have become a very relevant topic amongst people who are looking for an Angular-related job.

The Basics of AngularJS

As you can probably imagine, your employers will first want to know if you even have at least a basic understanding of what AngularJS is and what it does. That’s why you should brush up your theory. Don't worry, we got you covered, just read the questions below.

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Question 1: What is AngularJS?

You probably felt it coming: a lot of employers like to test their potential employees by giving them very simple definition-based questions and observing how the possible employee explains the answers in their own words. This shows if they actually know what they're talking about or if they just memorized a couple of lines from a book and have no idea what they are talking about.

So… What is AngularJS?

AngularJS is an open-source web framework that is designed for the easier creation of single-page applications. Maintained mainly by Google, Angular tries to provide an improved experience when delving into the realm of front-end development.

Question 2: What are ‘directives’? What types of directives are there?

It’s one of the double AngularJS interview questions, yet the answer is pretty short and simple.

In AngularJS, directives are certain attributes that allow you to come up with your own, the personal syntax for the application that you are developing. This grants your page a level of exclusivity and lets you add a personalized touch to the development process.

In total, there are four different types of directives: attribute, comment, CSS and element ones.

Question 3: How are ‘directives’ used?

In AngularJS, directives are used to extend specific HTML attributes. Furthermore, after the attributes are extended, Angular uses expressions to bind the data to the HTML.

Question 4: What are ‘expressions’?

When it comes to AngularJS interview questions, these basic definitions do take up a big portion of the whole picture. However, it is very important to both know and be able to explain these basic, simple concepts in your own words.

Expressions in Angular are used to bind data in HTML. The issue arises when we notice that the way that Angular uses expressions are very similar to that of Java’s. So how does one differentiate between the two?

One of the main differentiating factors is that you can’t use conditionals, exceptions, and loops within the AngularJS expressions. However, you can do all of those things in Java. Another big point is that Angular allows you to filter your data before actually displaying it on the live servers - an option that Java lacks.

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Question 5: Which browser is AngularJS not compatible with?

This is one of the many trick AngularJS interview questions that you might receive during your job interview. Don’t fall for it - your potential employers might want to test your knowledge by checking just how sure you are with your answer.

Angular is compatible with all current web browsers.

Question 6: Compare the ‘link’ and ‘compile’ functions.

Some of your AngualrJS interview questions might require you to compare certain Angular features. It is best to keep these comparisons short and simple, rather than to go on and try to look like a know-it-all, yet fail miserably.

'Link’ is used to produce a live view. What it does is that it takes the directives and blends them with the scope.

The ‘compile’ function collects directives and alters certain DOM (Document Object Models) templates.

Question 7: What is ‘scope’?

In AngularJS, scopes trigger the execution of expressions. They are objects that are used to represent the application models.

Question 8: What are ‘templates’?

Templates are simple HTML pages that have your specific syntax applied to them. This means that you can implement your data into the page to make it unique and original.

Question 9: What is ‘internationalization’?

When it comes to basic AngularJS interview questions and answers, this one might prove to be a bit of a bigger challenge. It honestly depends on just how deep your interviewer might want to go with it.

To put it very simply, internalization is a process where you would implement location-specific data into your website. The most common practice for this happens when you want to create a site that would be accessible by multiple languages.

This process is set to the default browser that the user is on at the time of accessing the site. If you wanted to make it location-specific, you would have to implement specific attributes depending on the targeted country.

Question 10: What’s the difference between ‘$scope’ and ‘$rootscope’?

Both of these functions are used to connect your personalizations with the live version of the webpage. The difference is that $scope has limited availability, while $rootscope can be accessed across-the-board.

We are nearing the AngularJS interview questions and answers for experienced developers, but there are still a few types of questions that we need to cover on a basic level.

Question 11: What’s the difference between ‘$’ and ‘$$’?

“$” is used for public objects, while “$$” is used for objects that you want to maintain as private. These prefixes prevent confusion and accidental code conflictions.

Question 12: What is the main difference between AngularJS and Angular 2?

A lot of developers and Angular users do agree on a single main difference between the two versions of Angular.

This difference has got to do with the scripts that are used within these frameworks. AngularJS uses Javascript, while Angular 2 uses Typescript to create its apps.

Question 13: What is the most popular program to test AngularJS apps?

As of late, when it comes to AngularJS interview questions, Jasmine is considered by many to be the go-to choice when looking for programs to test their created Angular applications. Jasmine is a framework that allows you to fully customize your tests and document the outcomes along the way.

Question 14: Is AngularJS compatible with mobile browsers?

This might be a follow-up question that your potential employers ask you if you answer “compatible with all” the Question 5 on this list. Your interviewer might want to put your off-balance and see if you’re positive with your answer. You should be.

Angular works on all of the recently updated mobile browsers Chrome, Firefox, Edge, IE Mobile, Android, and iOS Safari.

Question 15: Name some of the advantages of using AngularJS.

Probably one of the most open-ended AngularJS interview questions, this is where you can truly show you motivation concerning using Angular. The type of answer that you provide will show what (which functions) you most likely prioritize when using this framework.

Some of the more popular and well-known advantages include, but are not limited to: adding custom animations and directives, allows form validations and MVC pattern implementations, supports full server communications, etc.

AngularJS Information for Experienced

Don’t be intimidated with the term “advanced” - you (probably) won’t need to create a website from scratch during your job interview. Advanced interview questions on AngularJS simply mean that your employers will conduct a deeper test of your knowledge on the topic - they might have follow-up questions, ask to give an example, etc.

Question 16: What validations does AnguarJS support?

Angular supports all of the HTML5 validations. If your potential employer requires an example, here are a few you can give: min, max, type=”499”, etc.

Question 17: What is “E2E testing”?

Although it might sound like one of the fancier AngularJS interview questions, the explanation behind E2E testing is pretty simple.

“E2E” is an abbreviation of “end-to-end” testing. It is a form of testing that is focused on checking if your application runs properly and smoothly. As the name implies, E2E testing is thorough and examines your app from front to back.

Question 18: How would you change the ‘start’ and ‘end’ symbols?

If you wanted to change the ‘start’ and ‘end’ symbols to custom ones, you could do so by entering the $interpolateprovider command into your config.

Question 19: How many ng-app directives can there be on a single HTML page?

One of the simpler AngularJS interview questions for experienced. Just one. If there is more than one application in your AngularJS file, the HTML document will choose the first ng-app directive and make it the root of the document.

Question 20: What is ‘$locale’?

The $locale the function is used to define the location rules for your application. A great example of this would be when we talked about internalization on Question 9.

Question 21: Define “dependency injection”.

strong>Dependency injection is a process where variable dependent objects are injected into the application instead of being brought there by a user.

Why would you need this? Well, one of the main uses for this is testing.

Question 22: What is ‘bootstrapping’?

Probably one of the easier explainable AngularJS interview questions, bootstrapping can simply be defined as running the Angular application that you have developed. Whilst using Angular, you can do this in two ways: manually or automatically.

Question 23: What’s ‘$routeprovider’?

$routeprovider accesses the controller and fetches you the URL parameters.

Question 24: Is it possible to implement SPA (Single Page Application) into Angular?

Yes - you would do so by accessing Angular routes.

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Question 25: What’s the difference between controllers in AngularJS and Angular 2?

In AngularJS, controllers have pretty specific usages, one of the main ones being writing the application logic. However, when it comes to Angular 2, there are no longer any controllers left - instead, components take their place.

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General Advice

So, that covers both the basic and advanced AngularJS interview questions and answers. Naturally, there are many, many more different variations of Angular interview questions, but the ones provided in this tutorial should give you a general outlook on what to expect during the interview.

Now, let’s talk about some general advice.

First of all, self-confidence. You probably know all about how it is important to be (or at least act) confident so that your interviewer would think that you’ve done this a million times already and are secretly an expert. Well, while that's all fine and dandy, I would like to remind you that there is a big difference between being confident and simply acting like a jerk. Don’t overdo it - if you manage to show confidence and humility during your job interview, your employers are likely to appreciate it.

Another thing is the actual answering of AngularJS interview questions. Remember - a lot of employers don’t care too much for the answers themselves (unless they are way off) but they are closely watching your reactions to their questions and evaluating your ability to answer those questions clearly and concisely. Body language, tone of voice, posture - all of these and many other things play a big part when trying to score that dream job.

Lastly, don’t overthink it. That’s usually the main thing that causes failure in a job interview - you start being nervous, that impacts your performance, and then after everything’s done, you’re mad with yourself for not being able to showcase your abilities because the nervousness kept getting in the way. Relax - chances are, your potential employers have seen this situation a billion times before. Just do the best you can to show your true personality, and let your knowledge on the Angular interview questions handle everything else. If you think that your AngularJS is still a bit rusty, be sure to take a course and deepen your skills. Our top choice is this Angular 2 tutorial.

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