40 Angular 8 interview questions to ask talented software engineers

An Angular 8 engineer’s role is complex and requires many skills. But if you’re a non-technical recruiter needing to hire an Angular 8 software engineer, evaluating their experience can be difficult.

Even though resume screening is the conventional approach, replacing this with skills assessments, including an Angular skill test, is a faster, more efficient method. And afterward, you will have no problems creating a shortlist of applicants for the interview phase. 

At the same time, you need Angular 8 interview questions to keep your candidates engaged during the interview. So, if you’re searching for the best questions to ask Angular 8 engineers, check out our list and select the most appropriate for your recruitment process.

✅ Make your list of Angular 8 interview questions to assess talented software engineers

Beginner Angular 8 interview questions to ask junior software engineers

Ask your junior software engineers some beginner Angular 8 interview questions to check their skills before you hire someone.

1. What is Angular 8? What do software engineers use it for?

2. Can you name a few examples of Angular 8 advantages?

3. Can you explain why Git version control skills are essential for Angular 8 engineers?

4. Can you tell us some of the main features of Angular 8?

5. Can you explain what class decorators are in Angular?

6. Could you tell us what property decorators are in Angular?

7. What do you understand about method decorators in Angular?

8. What are parameter decorators in Angular?

9. Can you explain what a template is in Angular?

10. Do you understand what data binding is? Name the type of data binding Angular deploys.

5 beginner Angular 8 interview questions and sample answers

Need a way to review your candidates’ responses? Take a look at our sample answers to the above beginner Angular 8 interview questions.

1. Can you name a few examples of Angular 8 advantages?

Angular 8 offers software engineers a couple of great advantages. Not only can applicants use this framework to learn how to structure an application, but it also has a few design patterns and modules to aid engineers with smooth application creation.

What’s also great about Angular 8 is that it helps engineers create clean, maintainable code and offers unit testing advantages.

Check if your candidates have made the most of these advantages in their projects by asking follow-up questions such as, “How has Angular 8 contributed to your successful projects?”

2. Can you explain why Git version control skills are essential for Angular 8 engineers?

Git version control skills are critical for engineers and developers who need to create applications. This tool enables engineers to track changes to their code and ensure they can access previous versions.

The best thing about Git is that software engineers can use this powerful tool without extra software. They can use and enable source control features in Git by making a repository to work well with other developers.

Need an easy way to evaluate your candidates’ Git skills? Use our Git skill test to learn more about their abilities.

3. Can you explain what a template is in Angular?

Angular templates are HTML code structures that inform the framework of how to render components. Candidates with experience using these templates should understand that they work using Angular-specific attributes to complete this goal. 

What’s great about Angular templates is that they provide users with dynamic views. In other words, when Angular renders the template, it shows the data the Angular application’s building blocks (components) contain.

4. Can you tell us some of the main features of Angular 8?

Angular 8 has several handy features that engineers can use to build software. This framework is open-source, which makes it cost-effective, and offers support for TypeScript.

Candidates might also mention a few other features when responding to this question, such as:

• Differential loading 

• Builder APIs

• Lazy loading

Check whether your applicants understand the advantages of these features. For example, do they know that differential loading features enable engineers to serve bundles to several browsers and enhance the speed of their application?

5. Do you understand what data binding is? Name the type of data binding Angular deploys.

One of the core concepts of Angular 8 is data binding, which defines the communication between the document object model (DOM) and the component. This concept helps engineers manipulate elements of web pages with a browser. 

Applicants should understand that data binding is ideal if a web page has interactive components. It ensures the pages use incremental display methods if they have lots of data.

They should also know that Angular deploys two-way binding, enabling the framework to connect the document object model to the model data.

Intermediate Angular 8 interview questions to ask mid-level software engineers

Ask interviewees a few Angular 8 interview questions to get a feel for their framework knowledge.

1. Can you name one advantage of AOT?

2. What do you understand about Angular Ivy? Can you explain what it does?

3. Can you name a couple of features of Bazel?

4. Can you explain what the wildcard route helps engineers do?

5. Can you tell us what the Angular Promise concept does?

6. Can you tell us what the Angular Observable concept does?

7. What do you understand about lazy loading in Angular 8?

8. Can you explain to us what custom elements are in Angular 8?

9. Can you explain what the RxJS utility functions are?

10. What do you understand about AOT?

11. Do you understand what subscribing means in the context of Angular 8?

12. What do you understand about Bazel? Can you explain what it is?

13. What does Codelyzer do? When would you use it?

14. Do you understand what view encapsulation is in Angular?

15. Can you explain what scope means in Angular 8?

5 intermediate Angular 8 interview questions and sample answers

Take a look at our sample answers to these Angular 8 interview questions to assess your applicants’ responses and review their knowledge.

1. Can you name one advantage of AOT?

With this Angular 8 interview question, you can put your candidates’ knowledge of AOT (ahead of time) compilers to the test. Applicants should first define AOT and explain that it pre-compiles application components and templates as part of the build process. You should also expect applicants to mention that this compiler helps apps launch faster.

The best responses will explain how AOT compilers enhance the launch speed of applications. For example, since engineers can embed the templates as code in their components, the template files do not need client-side requests.

2. What do you understand about Angular Ivy? Can you explain what it does?

A significant part of Angular 8 is Ivy. It’s a rewrite of the Angular compiler and a rendering engine that changes Angular code into JavaScript and HTML. This engine helps engineers compile components independently of each other.

These functions ensure the browser understands the code and speeds up the application development time.

3. Can you name a couple of features of Bazel?

Bazel is software that many engineers use to automate and build projects. It’s a powerful tool that monitors dependencies between packages and is ideal for large-scale initiatives. To answer this Angular 8 interview question correctly, candidates should know three main features of this tool, including that:

• Bazel has an algorithm that helps it build and determine dependencies

• The tool works independently of the technology stack

• Engineers can use Bazel to build any application with the same interface

4. What does Codelyzer do? When would you use it?

Enterprise applications that use specific coding conventions rely on the Codelyzer open-source tool to ensure they follow the correct specifications. This tool follows tslint rules and analyzes static code for Angular TypeScript projects. 

Although applicants can use Codelyzer to write clean code, it’s well worth testing their coding skills with follow-up questions. You can also use our Clean Code test for a data-driven skills evaluation approach.

5. Do you understand what view encapsulation is in Angular?

To test your candidates’ technical knowledge of Angular 8, ask them this interview question. The optimum responses will explain that view encapsulation helps a component’s templates affect the entire application. 

Skilled candidates will know that Angular offers three encapsulation strategies, including the following:

• Native: In this strategy, styles don’t move from the main HTML to the component.

• Emulated: For emulated view encapsulation, styles do move from the main HTML to the component.

• None: In this strategy, styles move from the main component back to the HTML.

Advanced Angular 8 interview questions to ask senior software engineers

Use these advanced Angular 8 interview questions when interviewing senior software engineers for your vacancy.

1. Explain when and why you would use ngOnInit with a constructor.

2. Can you tell us what service workers are in the context of Angular 8?

3. Could you explain how you would detect a route change in Angular 8?

4. Do you understand what JIT compilers do? Can you explain their function?

5. What do you understand about incremental DOMs?

6. What do you understand about virtual DOMs?

7. Can you tell me what zone is in Angular 8?

8. Can you explain what ngUpgrage does in Angular 8?

9. Why is Bazel important for Angular builds?

10. Can you explain to us how Ivy affects build time?

11. Do you understand what Bootstrap is? Can you give us a definition?

12. Can you explain how engineers embed Bootstrap into Angular?

13. What do you understand about the dependency injection concept?

14. Can you tell me how JIT is different from AOT compilation?

15. How is HTML important for Angular 8 software engineers?

16. How is TypeScript a crucial skill for Angular 8 software engineers?

17. Name some advantages and disadvantages of using local storage, rather than cookie functionality.

5 advanced Angular 8 interview questions and sample answers

Review your candidates’ responses using sample answers to these advanced Angular 8 interview questions.

1. Can you explain how engineers embed Bootstrap into Angular?

Candidates for senior roles who use Bootstrap should know that it’s a powerful tool kit comprising JavaScript, HTML, and CSS tools. This collection of software helps software engineers create responsive applications and web pages, and they can embed this library with the following approaches:

• Use a CDN (content delivery network): This method enables engineers to load JavaScript and CSS files from remote servers.

• Use an NPM (node package manager): This approach requires engineers to install Bootstrap into their project folder with the NPM.

2. What do you understand about the dependency injection concept?

Dependency injection enables software engineers to reuse code without hard-coded dependencies. When engineers remove these dependencies using this method, they can enhance the maintainability of the code and make it easier to test. 

The best engineers will understand that developers can use this strategy in frameworks like AngularJS and React JS via a dependency injection library. To create one, they need to:

• Make a dependency injection container

• Register all dependencies with the container

• Inject them into the code by providing the name of the dependency

3. Can you tell me how JIT is different from AOT compilation?

Candidates responding to this Angular 8 interview question should know that JIT compilation means just-in-time compilation, while AOT means ahead-of-time compilation. If they’ve got a lot of experience with these compilation actions, they should be able to explain the main differences.

Top answers will mention that ahead-of-time compilation completes code conversion before the browser runs the code. They will also explain that just-in-time compilation converts computer code to machine code at execution time.

Experts can prove their expertise by explaining that JIT compilation is a default option for engineers who run ng serve command line interface commands.

4. How is HTML important for Angular 8 software engineers?

HTML is a crucial skill for Angular 8 software engineers, helping them build the best, most functional applications. It ensures engineers can render the apps in browsers using HTML and CSS. 

A simple understanding of HTML is also handy for creating single-page applications using code in the Angular framework. Therefore, ask applicants follow-up questions, such as “Could you explain your experience with using HTML for engineering projects?” to dig deeper into their HTML and Angular knowledge.

Searching for a way to assess your applicants’ HTML skills? Our HTML5 skill test is the simplest way to evaluate their knowledge – use it in your assessment to identify the strongest candidates.

5. How is TypeScript a crucial skill for Angular 8 software engineers?

A primary programming language for developing Angular websites is TypeScript. Angular development supports this strongly typed programming language and has several advantages for engineers creating functional websites. For example, TypeScript reduces bugs in code.

Engineers who understand TypeScript can manage substantial projects and use the many variables and functions to meet their client’s expectations.

Assessing your applicants’ TypeScript skills is easier than you may first assume – use our TypeScript skill test to check their knowledge of this programming language.

For which roles can you use Angular 8 interview questions?

It’s worth using Angular 8 interview questions to assess front-end developers who use Angular 8 when creating applications. These questions are also ideal for backend developers responsible for API-based UI design.

Our team recommends that you match the difficulty of the interview question to the expertise of your Angular engineer candidates. This process involves selecting beginner Angular 8 interview questions for junior applicants and advanced questions for senior Angular engineers, which will make your candidates feel comfortable in the interviews.

When should you use Angular 8 interview questions in the hiring process?

As soon as you’ve made an assessment with our Angular test and received your applicants’ results, you will find it easier to create a shortlist of candidates. Skills testing will lead you to the candidates with the highest expertise in Angular 8 and help you target those candidates for an interview.

Select up to five tests for your assessment, send it to your applicants, and use the results to create a list of applicants you want to interview. Then, use our Angular 8 interview questions for a more in-depth evaluation.

Make your list of Angular 8 interview questions to assess talented software engineers

You’re now prepared to assess any software engineer who will use Angular 8 for your company. Remember, skills testing can substitute resume screening and help you avoid unconscious bias. 

For a data-driven hiring strategy that tells you who your best applicants are, sign up for a free plan with TestGorilla. Learn how TestGorilla is transforming hiring processes in a free, 30-minute demo and combine this method with Angular 8 interview questions for an effective hiring process.