Table of Contents
- 1 Introduction
- 1.1 Question 1: What is AngularJS?
- 1.2 Question 2: What are ‘directives’? What types of directives are there?
- 1.3 Question 3: How are ‘directives’ used?
- 1.4 Question 4: What are ‘expressions’?
- 1.5 Question 5: Which browser is AngularJS not compatible with?
- 1.6 Question 6: Compare the ‘link’ and ‘compile’ functions.
- 1.7 Question 7: What is ‘scope’?
- 1.8 Question 8: What are ‘templates’?
- 1.9 Question 9: What is ‘internationalization’?
- 1.10 Question 10: What’s the difference between ‘$scope’ and ‘$rootscope’?
- 1.11 Question 11: What’s the difference between ‘$’ and ‘$$’?
- 1.12 Question 12: What is the main difference between AngularJS and Angular 2?
- 1.13 Question 13: What is the most popular program to test AngularJS apps?
- 1.14 Question 14: Is AngularJS compatible with mobile browsers?
- 1.15 Question 15: Name some of the advantages of using AngularJS.
- 2 Essential AngularJS Interview Questions – Advanced
- 2.1 Question 16: What validations does AnguarJS support?
- 2.2 Question 17: What is “E2E testing”?
- 2.3 Question 18: How would you change the ‘start’ and ‘end’ symbols?
- 2.4 Question 19: How many ng-app directives can there be on a single HTML page?
- 2.5 Question 20: What is ‘$locale’?
- 2.6 Question 21: Define “dependency injection”.
- 2.7 Question 22: What is ‘bootstrapping’?
- 2.8 Question 23: What’s ‘$routeprovider’?
- 2.9 Question 24: Is it possible to implement SPA (Single Page Application) into Angular?
- 2.10 Question 25: What’s the difference between controllers in AngularJS and Angular 2?
- 3 General Advice
- 4 Conclusions
IntroductionAs you can probably imagine, your employers will first of all want to know if you even have the most basic of an understanding of what AngularJS actually is and what it does. That’s why we’ll start from some of the more simple and basic questions and after you kind of develop a feeling of how all of this works, we’ll transition to some of the more advanced topics surrounding Angular.
Question 1: What is AngularJS?You probably felt it coming, but the very first interview questions on AngularJS that we need to get out the way is what Angular even is in the first place? You might think: I wouldn’t be reading this tutorial if I didn’t know what Angular is! Although that is probably true, a lot of employers like to test their potential employees by giving them very simple definition-based questions and observing how the wannabe employee explains the answers in his own words. This shows if he actually knows what he’s talking about or if he just memorized a couple of lines from a book and has no idea what Angular even is. So… What is AngularJS?
Question 2: What are ‘directives’? What types of directives are there?It’s one of the double AngularJS interview questions, yet the answer is actually pretty short and simple. In AngularJS, directives are certain attributes that allow you to come up with your own, 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 interview questions on AngularJS, these basic definitions really 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. As I’ve mentioned in the answer to the previous question, expressions in Angular are used to bind data in HTML. The issue arises when we notice that the way that Angular uses expressions is 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 really 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.
Question 5: Which browser is AngularJS not compatible with?
Some of your AngualrJS interview questions might require you to compare and contrast certain specific 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 basically 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 simply HTML pages that have your specific syntax applied to them. This means that you are able to implement your own data into the page so as 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.
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
$scopehas limited availability, while
$rootscopecan 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 13: What is the most popular program to test AngularJS apps?As of late, 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?
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.
Essential AngularJS Interview Questions – AdvancedNow that you have some idea of just what the basic AngularJS interview questions should look like, we can transition and move on to AngularJS interview questions and answers for experienced developers. 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 means 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. I’ll mix these questions up to show as much variety as possible so that you could have a better understanding of what to expect in the second part of the interview.
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 actually 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, the E2E testing is thorough and examines your app from front to back.
Question 18: How would you change the ‘start’ and ‘end’ symbols?
$interpolateprovidercommand into your config.
Question 19: How many ng-app directives can there be on a single HTML page?Just one. If there is more than one application in your AngularJS file, the HTML document will choose the first ng-app directive and make it the root of the document.
Question 20: What is ‘$locale’?The
$localefunction is used to define the location rules for your application. A great example of this would be when we talked about internalization on Question 9.
Question 21: Define “dependency injection”.Dependency injection is a process where variable dependant objects are injected into the application instead of being brought there by a user. Why would you need this? Well, one of the main uses for this is testing.
Question 22: What is ‘bootstrapping’?Probably one of the easier explainable AngularJS interview questions, bootstrapping can simply be defined as running the Angular application that you have developed. Whilst using Angular, you can do this in two ways: manually or automatically.
Question 23: What’s ‘$routeprovider’?
$routeprovideraccesses the controller and fetches you the URL parameters.