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40 Best Angular JS Interview Questions And Answers for Beginners and Experienced Coders

Angular JS Interview questions and answers

AngularJS is among the most preferred JavaScript framework that is being used across the world, owing to its various benefits over other frameworks. However, choosing an expert and experienced AngularJS developer is a prerequisite if you want to leverage the full potential and features of the framework. As a company, you would only want the top talented developers in your software development team to ensure success either for your clients’ projects or any in-house project.

The high demand for experienced AngularJS developers has left a void in the market where many recruiters struggle to find the right talent for their company. However, if we are to look at the supply side of the market, we don’t see any lag in experienced AngularJS developers, which leaves us wondering if the recruiters are using the right technology, and tools to find the best candidate. Perhaps, employers themselves aren’t much ready with the right angular interview questions to judge the candidate’s expertise in the field. Whereas, on the flip side, the candidates’ also at times fail to prepare aptly for the AngularJS interview questions, leaving them at disadvantage positions for job hiring.

Here in this blog, we have come up with detailed angular interview questions and answers for recruiters, as well as, aspiring AngularJS developers.

However, before we move on with our detailed interview questions on AngularJS, let’s briefly look at some of the core skills recruiters should screen through during the interview. Alternatively, you can also leave the screening procedure to experts and use our professional Hiringguru platform for questions on AngularJS Test. Here you may also find 1000+ professional assessment tests that you can use to find the best talent across all domains.

Dont forget to check out our detailed ETL Inteview questions guide.

Hiringuru Skill Assessment Test for Angular Developers

Hiringguru is the world’s leading professional testing platform that offers recruiters/employers with all the technical resources they need to find and screen the top talent for their team. Some of the reasons recruiters prefer using Hiringguru as their preferred screening platform includes:

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With an extensive library of 1000+ online tests and a professionally maintained screening procedure, Hiringguru enables recruiters and employers to fasten up the process of candidates’ screening and ensure they are able to go through more candidates in a shorter time to find the best fit for the company.

–         Look beyond Resumes 

Programming is one field where the true potential and skills of an individual aren’t often fully represented in the resumes. Likewise, you need to look beyond the resumes and deeper into the abilities and strengths of the candidates to figure out the true worth and development skills of candidates. That’s precisely what Hiringguru help recruiters with; identify the true coding potential of candidates.

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To ensure consistency in the expertise of your team, you need to have well-defined standards to judge the technical prowess of candidates you employ With Hiringguru professional screening tests, you can ensure to implement the highest technical standards for all your new hiring.

Comprehensive Assessments to Find the Best Fit

What makes Hiringguru one of the best online recruiter platforms is the various assessment tests that enable recruiters to identify the complete worth of candidates. Some of the tests offered at Hiringguru includes:

–         Aptitude Tests

The most frequently conducted MCQs based tests that give a fair idea to assess candidates’ abilities towards the job by correlating the scores with the job performance.

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–         Domain Tests

A great resource to assess the ability and domain knowledge of candidates required to optimally perform all the tasks.

Skills in Hands before Appearing in Any Angular Interview Questions Session

So, before beginning with our angular interview questions to assess candidates, let’s quickly take a look at some of the skills you should consider when hiring an AngularJS developer.

–         Sound Understanding of MVVM and MVC

Any AngularJS developer should be familiar and have sound working capacity on MVC/MVVM model patterns. Some of the aspects the potential candidate should have a good command of includes; Corners separation, data binding, command binding, validation, and unit testing.

–         JavaScript, HTML and CSS Skills

Honestly, this is a no-brainer. Any candidate interviewed for a position of AngularJS developer should come with apt proficiency in HTML and JavaScript. Especially the candidate’s skills in JavaScript directly translates into better and cleaner code development for projects. Also, the potential candidate should be familiar with the best practices required for the development of AngularJS web applications.

–         App development experience

Prior app development experience is always a plus point for candidates, as it gives them the real-world experience of problem involved in app development. Thereby, when interviewing a candidate for the AngularJS developer position, ask them if they have any prior experience of developing an app from scratch.

–         Strong Communication Skills.

Last but not least, the potential candidate should have exceptional communication skills. In today’s software development industry, developers aren’t just required to write clean and robust codes, rather they are also required to constantly communicate with clients, as well as, with other team members including the HTML coders and designers ensure the integrity of the app. Thereby, they need to be confident with their communication skills with the ability to elaborate on technical concepts to non-technical clients or coworkers.

Angular Interview Questions and Answers Topics

Ok, just before we begin with our angular interview questions and answers, let’s have a quick look at some of the important topics you would like to go through in more depth during the interview.

  • Modules
  • MVC (Model, View, Controller)
  • Data Binding
  • Dependency Injection
  • Filters
  • Services
  • Unit Testing
  • Routing
  • Templates
  • Expressions
  • Scope
  • Directives

15 Best Angular JS Interview Questions for Beginners

Now, let’s begin our AngularJS interview questions. First, let’s have a look at Interview questions on AngularJS for less experienced or beginner developers, while in the next sector we will be covering Angular question interviews for experienced developers.

Q1. What is Angular?

AngularJS is a front-end web framework. Since it’s an open-source framework, it is quite popular with developers and coders across the world. The AngularJS framework is primarily maintained by Google and offers developers’ easy platform for the development of web-based applications. The front-end web-framework also enables developers to curate cross-platform applications. The framework comes with come powerful and cutting-edge features including end-to-end tooling, declarative templates, and others than enable seamless development process.

Q2. What are some of the benefits of using AngularJS?

Some of the major benefits of the AngularJS framework includes:

  • Option to add a custom directive
  • Supports validation
  • Supports two-way data-binding
  • Support RESTfull services
  • Follows MVC pattern architecture
  • Supports dependency injection
  • Supports client and server communication
  • Cutting-edge features including Event Handlers, Animation and others
  • Support static template
  • Support Angular templates

Q3. What is the primary use of AngularJS?

AngularJS is primarily used for the web-based Single Page Applications (SPA) development. The framework comes with various ready-to-use modules that are meant to simplify the process of application development for developers. Apart from various ready-to-use tools, the framework also comes with numerous features like type safety, modular CLI, data stream, and others. It is also considered as the complete web framework.

Q4. What do you know about Angular Expressions?

Angular expressions are snippets much similar to {{expression}} in JavaScript. The primary use of these expressions is to bind application data to HTML.

Q5. What are templates in Angular?

The templates in Angular comprise of specific elements and attributes specific to AngularJS. The templates are written in HTML and are combined with the information that follows through the model and controller and rendered even further to offer users a dynamic view.

Q6. What is string interpolation in AngularJS?

In AngularJS, the string interpolation represents a special syntax which is mentioned in {{}} double curly brackets. The string interpolation syntaxes are also known as Moustache Syntax and are often used to display the component data. Within the mustache syntax or string interpolation, JavaScript expressions are included and the output of this is embedded into the HTML code.

Q7. How to differentiate between Annotation and Decorator?

In AngularJS, Annotations represents the metadata set, used to create an annotation array. Alternatively, the decorators are the design patterns, primarily responsible to separate decoration or modification of a class, without having to alter the source code.

Q8. What are controllers in AngularJS?

These are JavaScript functions, which are used to bring data and logic to HTML UI. As can be taken by name, the controlled in AngularJS is responsible to control the data flow from server to HTML UI.

Q9. What is scope in Angular?

The Scope represents an object, which subsequently refers to the application model. The AngularJS Scope can be taken as the execution context for expressions, and are arranged in the hierarchical structure.

Q10. What are AngularJS directives?

Directives are the core features of the AngularJS framework, which enable writing new HTML syntax, customized for your application. Three different types of directives in AngularJS includes;

  • Component Directives
  • Structural Directives
  • Attribute Directives

Q11. What do you mean by data binding?

Data binding is one of the most powerful features of AngularJS, which enables developers to define the communication between Document Object Model (DOM) and Component. 

Q12. What is the filter used for in AngularJS?

Filters in AngularJS are primarily used to format the value of the expression, to offer a display to users. The filters in AngularJS can be integrated into the templates, controllers, services, or directives, whereas, custom filters can also be created to organize data and enable display in specific criteria.

Q13. What is a provider in Angular?

The provider is a configurable service in AngularJS, which is used to create a new instance of a service, and may also include additions methods to register new providers.

Q14. Are Nest Controllers supported by Angular?

Yes.

Q15. List down the ways to communicate between applications and modules.

Some of the common ways to communicate between applications and modules include:

  • Using services
  • Directly between controllers
  • Using Events

25 Best Interview Questions on Angular JS for Experience Developer

Now that we are done with the angular interview questions for beginners, let’s make things harder with angular interview questions and answers for experienced candidates.

Q1. How do you differentiate a service() and a factory()?

In AngularJS the service () represents the function and used as the business layer of the application. Whereas, factory () function works pretty similar to service (), however, is more powerful and flexible compared to the latter. 

Q2. Define $Scope and scope in AngularJS.

In AngularJS, $SCOPE is meant to implement the dependency injection (DI), which can be injected into service, controllers, or directives. Whereas, SCOPE is a directive link that may represent anything including name, a function parameter, or other.

Q3. What’s the scope hierarchy?

In AngularJS, the $SCOPE objects which are mostly used by views are arranged into the hierarchy and comprise of a root scope, which may include further scopes as “child scopes”. In simple terms, one root scope may contain various child scopes arranged in scope hierarchy.

Q4. What is AOT?

Ahead-of-Time (AOT) is used for pre-compiling the application components. Components which are compiled using AOT in AngularJS takes minimum time to launch and can be executed immediately, and doesn’t need any client-side compilation.

Q5. Explain jQLite.

JQuery lite of jQlite contains all of the features of jQuery, of which it is the subset. The jQlite comes in the AngularJS package by default and enable the framework to manipulate the DOM, to make the application compatible cross-browsers.

Q6. Explain Angular Modules.

All applications developed on AngularJS follows the NgModules which is the modularity system. The modularity system in containers holding a cohesive block of codes specifically meant for an application domain, workflow or other related capability sets.

Q7. Which type of components can be used to create a custom directive?

Following components can be used to create custom directives:

  • Comment – this custom directive is activated as soon as a matching comment is encountered
  • Element directives – this custom directive is activated when encountered with a matching element
  • Attribute – this custom directive is activated with the matching attribute
  • CSS – this custom directive is activated by encountering a matching CSS style

Q8. List different AngularJS filters

Some of the AngularJS filters include;

  • Currency
  • Date
  • lowercase 
  • filter 
  • orderBy 
  • uppercase 
  • JSON 
  • limit
  • number

Q9. Define Dependency Injection.

Dependency Injection or DI represents a software design pattern. In dependency injections, the objects are carried as dependencies within the components.

Q10. What’s the dirty checking in AngularJS?

The Dirty Checking in AngularJS is meant to scan complete scope for changes, comparing the new scope model values with the old values.

Q11. Explain transpiling.

Transpiling in AngularJS represents transforming source code from one programming language into another.

Q12. How animation is performed in AngularJS?

To be able to perform animation you need a special AngularJS library (Animate), which subsequently refer to the ngAnimate module inside the application module

Q13. Explain transclusion.

The transclusion feature in AngularJS is meant to move a directive’s original children to certain locations into a new template.

Q14. What do events represent in AngularJS?

Events in AngularJS represent special directives that are used to customize the behavior of DOM events.

Q15. What are the tools used for testing AngularJS applications?

Some of the tools used for testing AngularJS applications include:

  • Sion
  • Karma
  • Mocha
  • Angular Mocks
  • Bowserify

Q16. How would you create a service in AngularJS?

Service is a substitutable object in the AngularJS and can be wired with various other dependency injections. There may be three broad ways that can be sued to create service in AngularJS including;

  • Factory
  • Service
  • Provider

Q17. Define the singleton pattern?

A singleton pattern in AngularJS is meant to limit the use of a class to one time and is mostly implemented on dependency injection and services. 

Q18. What is REST in AngularJS?

In AngularJS, Rest is an API style and stands for Representational State Transfer. The REST API, the data is pinpointed for processed through the requested URL.

Q19. Define bootstrapping in AngularJS.

In AngularJS, bootstrapping simply represents the initialization of starting of an Angular app.

Q20. What’s the difference between compile and link?

Link function in AngularJS is meant to register DOM listeners, while it is also used for DOM manipulation. Whereas, the compile function in AngularJS is meant for template DOM manipulation, as well as, to collect directives.

Q21. What are constants in AngularJS?

Constants are sued to define global data.

Q22. What is Angular Global APIs?

These are a combination of global JavaScript functions used to perform various tasks like converting data, iterating objects, and others.

Q23. Does AngularJS allow Nested Controllers?

Yes.

Q24. Is AngularJS compatible with all browsers?

Yes. It’s compatible with all major browsers including Chrome, Safari, Firefox, Opera, and others.

Q25. Provided that the factory and service are equivalent when to use each of them?

The Factory provider is primarily preferred when using an object, alternatively, the service provider is more preferred when using class.

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Ok, we certainly hope that you will have an adequate library of AngularJS interview questions by now to choose the best candidate. However, it gets even better when you sign-up for free on Hiringguru and get your hands around amazing features of the best recruitment platform. Some of the features of Hiringguru you get access to when you sign-up includes;

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Conclusion

In this blog, we detailed the broad spectrum of the knowledge, skills, and angular interview questions you as a recruiter may expect from candidates hoping to join your team as AngularJS professionals. Honestly, AngularJS is an amazing framework with some great features and tools to enable you to develop great web-based applications. All you need to do is to make sure you choose the best developer that have the skills and expertise to bring more value to your development team.

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