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Top AngularJS Interview Questions To Ask Before Hiring

  • Aayush Gupta
  • April 20, 2022
  • 11 Minute Read
Top AngularJS Interview Questions To Ask Before Hiring

There are many recruiters who have a hard time finding good AngularJS developers. The reason? Simply because of the crunch of good developers in the market while the demand for AngularJS development is ever surging. 

Additionally, the skills required to be a good AngularJS developer are different from those needed to be a good traditional web developer. 

This makes it all the more difficult for a recruiter to figure out what to look for when hiring an AngularJS developer.

If you’re an IT recruiter facing the same dilemma, don’t worry, we’ve got your back!

If you’re having trouble finding good AngularJS developers, try reaching out to a talent sourcing agency that specializes in placing web developers.

They will have a better understanding of the skills required and will be able to help you find the best candidates from their talent pool. 

Once they’ve shortlisted their best candidates, you can conduct an interview to make the final call. You’ll need your set of questions to ask, which will help you determine whether the candidate is the right fit for your job roles.

In this blog, we have listed some Top AngularJS interview questions for hiring and testing Angular developer skills. Be it a fresher or someone in a senior position; these questions will help you to gauge a candidate’s expertise and knowledge. 

Top AngularJS Interview Questions for Freshers 

If you’re looking for a rookie to work on some basic Angular projects that you have, then interviewing a fresher would be the best option. 

You don’t need someone with high technical knowledge to build an adequately functional website. 

As an IT recruiter, you’ll need to be prepared with a set of questions that you can ask while interviewing a fresh AngularJS developer. 

But to frame the questions, you’ll also need to have an understanding of basic skills that a fresher must have. Some of the most common AngularJS developer skills are:

  • A good understanding of the framework and its core concepts
  • The ability to write clean and maintainable code
  • Good problem-solving skills
  • A strong understanding of best practices and conventions

Of course, your mileage may vary depending on the individual developer’s skills and experience.

But in general, these are the kinds of things you can expect from a fresher AngularJS front-end developer. There are multiple other things you should know before hiring an Angular developer.

AngularJs Interview Questions for freshers

Now that you know the skills, here are the Angular interview questions and answers that’ll help you assess the candidate and make the final call.

1. What Do You Think are the Most Important Concepts in AngularJS?

This is one of the most important AngularJS interview questions that will help you to identify if the candidate understands the key concepts of AngularJS. 

Check if the candidate talks about dependency injection, two-way data binding, directives, and templates.

Each of these concepts plays a role in making AngularJS a powerful and easy-to-use framework.

Dependency injection is a technique used by AngularJS to provide the components of an application with the dependencies they need. 

This means that instead of having to hardcode references to other pieces of code, you can simply specify which dependencies you need and AngularJS will take care of the rest. 

This makes it easy to modularize your code and reuse components without having to worry about how all the pieces fit together.

2. What Do You Think is the Best Way to Structure an AngularJS Mobile App?

There is no one right answer to this AngularJS interview question since it will vary depending on the specific application you are building. However, there are a few general tips that can help you get started.

One important thing to keep in mind is the role of each component in your application. For example, you will want to make sure that each component has a clear purpose and is not trying to do too much. This will make your code more manageable and easier to understand.

Another tip is to think about how the different components of your application will interact with each other.

3. What are Some of the Best Practices and Conventions You Follow When Writing AngularJS Code?

Some of the best practices for writing AngularJS code include using correct casing for variables and identifiers, using camel case for controller names, using Pascal case for service names, and using kebab-case for directive names

It is also important to use the correct file naming conventions, which are different for each type of file.

For example, controllers should be named with a .controller.js suffix, while directives should be named with a .directive.js suffix.

If the candidate answers this AngularJS interview question satisfactorily and is aware of these conventions, it will help make their code more consistent and easy to read.

AngularJs Interview Questions
 4. Tell Me About a Time When You Had to Solve a Difficult Problem in AngularJS. How Did You Go About It?

This AngularJS interview question will help you learn about one of their past experiences or you can even give a hypothetical situation and ask them to find a solution. 

This will help you to understand how well the candidate finds out a solution, implements it, and also the effectiveness of the solution. 

You will be able to understand their decision-making skills and their ability to work in unusual/stressful situations.

5. Can You Show Me an Example of Some Clean and Maintainable Code You Wrote in AngularJS?

Asking this AngularJS interview question is the best way to understand the developer’s coding style. You can start by reviewing some of their past work. 

If they’re a total fresher and have never worked on a project before, you can give them a sample test to analyze their practical knowledge and coding style.

6. What Do You Think Makes a Great AngularJS Developer?

This is one of the most common questions that top Angular development companies ask before hiring.

There are many qualities that make a great AngularJS developer, including

  • Thorough understanding of AngularJS concepts and how they work together
  • The ability to write clean, maintainable, and testable code
  • Proficiency with JavaScript and the DOM
  • Solid debugging skills
  • A willingness to learn new technologies and keep up with the latest AngularJS application development trends
  • The ability to work well in a team environment
  • Excellent communication skills

If the candidate mentions any of these qualities while answering this AngularJS interview question,  then chances are that they’ll become a good asset to your company. 

7. What Do the Services Represent in AngularJS?

The services in AngularJS are used to represent different pieces of functionality throughout an application. Services can be used for tasks such as retrieving data from a server, processing user input, or providing utility functions. 

Keeping the code for these tasks separate from the rest of the application helps to make the code more modular and easier to maintain.

Services are typically injected into controllers through dependency injection, and they can also be injected into other services. 

This allows them to be reused across the application without having to duplicate code. There are many built-in services in AngularJS, such as $http and $route, but Angular developers can also create their own custom services.

8. What is the Purpose of Interpolation in AngularJS?

Interpolation is used in AngularJS to display values on the HTML template. These values can be either static or dynamic. Interpolation bindings are represented using the double curly braces “{{ }}”.

For example, {{ name }} will display the value of the “name” variable on the HTML template. Similarly, {{ user. name }} will display the value of the “name” property of the “user” object. 

We can also use expressions inside interpolation bindings, which will be evaluated by AngularJS and the result will be displayed. For example, {{ 1 + 2 }} will display 3 on the HTML template.

9. What is the AngularJS Module?

AngularJS modules are containers for different pieces of your AngularJS application. They can contain controllers, directives, services, filters, and other codes.

 Modules help to keep your code organized and can be used to reuse code across your application.

AngularJS modules are typically created using angular.module() method. This method takes two arguments: the name of the module and an array of dependencies (other modules that the new module depends on.)

10. Differentiate Between Compile and Link in AngularJS Development?

When we talk about AngularJS, “compile” and “link” are two operations that are performed during the process of creating a directive.

Compile creates the linking function for a directive. This is where template compilation happens, and it is executed once when the directive is created.

Link, on the other hand, links the compiled template with the scope. It is executed every time the directive is invoked.

These are just a few of the qualities that make a great AngularJS developer. If the candidate refers to a few of these qualities, the likelihood is that they may be well on their way to becoming an expert AngularJS developer.

These were a few of the most essential interview questions that will help you understand more or less everything about a fresher.

The candidate’s answers might vary but even if they’re around the gist of what we’ve mentioned above, know that you’ve found your ideal candidate!

Now, let us move on to AngularJS questions you can ask while hiring for a more senior AngularJS developer. 

AngularJS Interview Questions and Answers for Experienced Developers

While interviewing experienced candidates, there are a lot of aspects that you can cover. With a senior position comes managerial responsibilities too. 

We have framed a few top AngularJS interview questions that are a mix of soft skills and hard skills which will help you understand the candidate’s expertise in both areas.

AngularJs Interview questions for experienced developer

1. What are Some of the Unique Features of AngularJS?

One of the most basic AngularJS interview questions but it can tell you a lot about the candidate’s knowledge.

  • AngularJS is a powerful JavaScript-based development framework for building web applications and websites.
  • AngularJS is an open-source project, which means that it can be freely used, modified, and distributed by anyone.
  • It is a Model-View-Controller (MVC) framework, which means that it divides your application into separate models, views, and controllers. This makes your code easier to understand and maintain.
  • AngularJS uses two-way data binding, which means that changes to the model are automatically reflected in the view, and vice versa. This makes your application more responsive and user-friendly.
  • AngularJS has a large community of users and developers, which means that there is a wealth of resources and supports available

If the candidate is able to state at least 3-to 5 features, it is a telltale sign that they have in-depth knowledge about AngularJS. 

2. How Can Developers Overcome Challenges Faced When Using AngularJS?

One way that Angular developers can overcome challenges faced when using AngularJS is by utilizing the many resources that are available online.

There are a number of websites, forums, and other online resources that can provide helpful information and support for those who are working with the top AngularJS framework.

Additionally, there are a number of books and other printed materials that can be consulted for help with AngularJS development. 

Finally, developers can also attend conferences and meetups dedicated to AngularJS in order to learn from more experienced developers and get started on the right foot.

When your candidate knows the way to seek solutions, it will ensure that they will never be stuck for a long time regardless of how complicated the project is. 

3. What is AOT Compilation? What are the Advantages of AOT?

AOT compilation is an ahead-of-time compilation method used to improve performance. 

AOT has a number of advantages over traditional interpretation:

  •  Apps with AOT load faster because the code is already compiled and ready to run. There is no need to interpret the code at runtime.
  • AOT apps run faster because the compiled code can be optimized for the specific platform it will be running on. Interpreted code, on the other hand, is not platform-specific and typically runs more slowly as a result.
  • AOT can catch errors that would otherwise be missed at runtime. This means that your app is less likely to crash due to unforeseen circumstances.

Overall, AOT compilation results in improved performance, stability, and security for your app. If you are developing a performance-critical app, AOT is definitely worth considering.

AOT compiled apps load faster and run faster than interpreted code.

4. Explain Components, Modules, and Services in Angular

AngularJS Components are the most basic UI building block of an Angular app. They display data on the screen, listen to user input, and take action based on that input.

Angularjs Modules are like JavaScript libraries. They group a set of related codes so that they can be reused across projects. Each Angular app has at least one module, the root module, which is conventionally named AppModule.

AngularJS Services are singleton objects that hold data or business logic shared by multiple components. Services help us organize our code and make it easier to reuse state and behavior throughout the app.

A highly experienced AngularJS developer will be aware of these technicalities and make sure to keep them in mind while coding. 

5.  What are Lifecycle Hooks in Angular? Explain a Few Lifecycle Hooks

Lifecycle hooks are defined as specific points in the life of an Angular component, where that component can trigger certain actions.

For example, a component can use a lifecycle hook to perform initialization tasks when it is created or to clean up tasks when it is destroyed.

There are several different types of lifecycle hooks that can be used, each with its own specific purpose. Some of the most common hooks include

ngOnInit: This hook is called after the component has been initialized. It can be used for performing any final initialization tasks that need to be done.

ngOnDestroy: This hook is called before the component is destroyed. It can be used for cleaning up any resources that need to be released.

6. List Out the Differences Between AngularJS and Angular2

This is one of the best AngularJS interview questions to see how well the candidate is able to differentiate between the old and new versions. 

  • AngularJS is a framework while Angular2 is a platform.
  • In AngularJS, the controller and the scope are tightly coupled while in Angular2 they are not.
  • AngularJS was created using JavaScript while Angular2 was created using TypeScript.
  • AngularJS uses two-way data binding while Angular2 uses one-way data binding.
  • Here in AngularJS, scopes are hierarchical in nature while Angular2 scopes are not.
  • AngularJS directives are more powerful than Angular2 directives.
  • Filters are used in AngularJS to format data before displaying it to the user while pipes are used in Angular2 for the same purpose
  • There are many other differences between these two AngularJS application frameworks, but these are some of the most notable ones.

This is one of the most important AngularJS interview questions which will tell you a lot about the candidate’s knowledge. 

7. Explain String Interpolation and Property Binding in Angular

String interpolation is a method of creating string values from template expressions in Angular. The template expression produces the value, which is then passed to the directive.

Property binding is a feature in Angular that allows you to bind data to HTML elements. This is done by using the square bracket notation around the element property you want to bind to. The data can be a string, number, or boolean. You can also use property binding to set the attributes of an HTML element.

8. How are Angular Expressions Different from JavaScript Expressions?

The expressions are like JavaScript expressions with some important differences.

  1.  Angular expressions don’t have access to global variables like window, document, or location. This means that you can’t use Angular expressions to directly manipulate the browser window.
  2. Angular expressions are sandboxed. This means that they can only access properties on a scope object. They can’t call methods or access global variables.
  3. Angular expression syntax is very different from JavaScript expression syntax. For example, you can’t use assignment operators in Angular expressions.

Overall, Angular expressions are more restricted than JavaScript expressions. This is intentional as it makes our templates more secure and easier to reason about.

9. Why were Client-side Frameworks like Angular Introduced?

This is one of the most important Angular interview questions to ask while interviewing an expert AngularJS developer.

There are a number of reasons why client-side frameworks like Angular were introduced. 

One reason is that they help to make web applications more responsive and interactive. 

Another reason is that these frameworks can help to reduce the amount of code that needs to be written, making development faster and easier. 

Finally, client-side frameworks can also help to improve the overall performance of web applications.

10. Where Do You Get Your Tech News?

Finally, you need to know how updated the candidate is. This Angular interview question will help you to understand how much the candidate tried to stay on top of trends. 

Hiring someone who has good knowledge and someone who always stays in the know will make sure they bring their best skills to the table. 

Wrapping Up

Some of the questions were framed with the aim to test the candidate’s management and problem-solving skills. On the other hand, some of the advanced AngularJS interview questions will help you understand the knowledge and practical implementation aspect.

Wondering how you are going to find good candidates to choose from?

Here is when talent sourcing agencies like Uplers can help. We can provide access to the top 3.5% of talent in India and matchmake the right candidate as per the job requirements that you’ve provided. 

We will shortlist the best-suited pre-vetted candidates that align with your requirements and will be able to work remotely for you, thereby saving relocation costs for your company. 

All you need to do is conduct the final round of interviews to determine their eligibility. 

If this concept interests you in Hiring AngularJs Developers, then get in touch with us and know more about our hiring process.

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Aayush Gupta

Aayush Gupta

Associate Director, Brand Marketing
Aayush brings an inquisitive, rational and dedicated approach to brand marketing.

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