Angular 4 Interview Questions (10+ Sample Answers)

Angular 4 is a web framework that is mostly used to develop websites and web apps in the IT industry, isn’t it? We will discuss Angular 4 Interview Questions here.

1. Do you have any idea about frameworks?
2. How is it different from traditional? 
3. Do we need to follow the technology, and why we need to use it instead of basics?
4. What are the differences from other versions?
5. Have a seeker of opportunities for the industry?

Let’s go through it.

• Angular 4 framework is one of the tops most framework for web development, and it has easier usability and every time update according to development productivity. Google is an organization that maintains technology and improves usability. The best information is that it is an open-source product that can access the users to edit the code, add more things, and exchange their logic and creativity.
  
  
• The framework is to develop software efficiently with templates, tools, dependency injections and achieve the challenges. Angular 4 is the typescript-based, front-end web developing framework use in the industry nowadays for best practices.
  
  
• The angular framework is going with JavaScript mainly. The user needs to have a proper idea about HTML, JavaScript, typescript, CSS, and DOM called the document object model. The technology includes navigation, toolbar, and menus, and finally, the written code will be in typescript and executes with JavaScript to display in the same browser.

• Are you a regular angular user?

IT industry looking for talented spirits for the technology, and they need to prove if you’re a regular user or not to the technology? Various versions are released nowadays. You need to prove to the organization that you have a clear idea about the changing features and suggestions? Therefore interviews check your skills with angular JS and other versions.

Apart from these sections, the interviewers have been conducted interviews to check your eligibility in various ways. The interviewer needs to check why they choose you instead of all the candidates willing to take the job. In this article, we hope to give you the areas you need to cover for interviews related to angular 4.

• How the interview is going?

IT industry is moving on different talented spirits with appointments to the job roles, and questions can be confusing much time for angular because advanced angular related skills are required.

In usual IT and technology-related interviews they check your ability to prove,

1. Knowledge-the theories and information you gather about the technology.
2. Skills –the projects that you have done and past experiences.
3. Application-ability to apply skills and knowledge to real-world scenarios.

Under these major separated parts interviewers checking below categories as well to hire,

1. Angular JS
2. Angular 4
3. HTML, CSS, JavaScript, Typescript

This is the way to success the interview as a successful candidate by proving related technological parts and the ability the candidate has.

• Need to achieve your goals? Need to be the best one?

The article is given a big understand for candidates about the basic and advanced types of questions, and when an interview asks deep down how they should give the answers with good preparation.

• Basic Questions
• Advanced Questions

According to the skills checking candidate need to prove,

• What are the techniques they used in the project?
• What are the challenges they faced in the environment?
• How they manage people and projects?
• The experiences they take the form that?
• The working efficiency

Finally, the interviewer needs to check whether you are eligible for random situations and your problem-solving abilities. The candidate should give a great image of his or her decision-making abilities to the real-world scenarios for random situations.

• Problem-solving
• Apply solutions in a short time accurate 
• Thinking abilities (out of the box)
• Applications for accidental and real-world examples
• Let’s explore the technology.

Basic Angular 4 Interview Questions

• What is angular and for what you used it? Is there any special viewpoint?

Angular, a typescript-based open-source application framework used for developing web-related technology mainly used with basic web development concepts with HTML, CSS, JS, and angular JS, is the most considered part of the team for angular 4.

• What is the difference between angular 4 and angular JS? Why you used this version instead of angular JS?

Angular JS mainly uses HTML-based template language, and it goes with attributes and directives for attributes with binding data for expressions of HTML. This development is costly and as well as quick to develop. After this angular JS, angular 4 releases to the industry. Angular 4 is the latest version, and angular 4 has backward compatibility.

• Can you explain about CLI? How is it going with angular?

Angular CLI is an abbreviation for Command Line Interface, which uses to build angular related applications for Node JS style modules, same as install using with npm command.

• Have you any idea about angular routers and the usage?

The angular router is used to navigate the view based on one to another in the application perform tasks. This is worked as bowser application navigation.

Advanced Angular 4 Interview Questions

• Angular introduces the client-side framework? Why?

Actually, vanilla JS and JQuery can be developed with dynamic websites with more complexity and more functions and features. Therefore it is tough to maintain the code and no provision of data handling facilities around JQuery. Angular 4 is the way to solve this issue. It helps to divide the code for small bits of information, some kind of same-like components. If vanilla JS can be a slower process, advanced web applications are developed according to this method.

• Do you know about the features in angular 4?

The first one is application accessibility, which permits the development of accessible applications with ARIA-enable components, a11y test infrastructure, and developer guides. The second one is CLI which we discussed in the above question but very important to interviews. The next one is the animation support. Here we have API permits to create high-performance and complex animations with a small code. Cross-platform time development is another feature that we used angular, like the software available for Linux, Windows, Mac OS, etc. It provides code split (divide), templates, testing, and code generation as well.

• Can you explain some methods in the angular lifecycle?
  • ngDoCheck -called for detecting and acting on changes that can’t detect angular after ngOnChanges and ngOnInit.
  • ngAfterContentChecked -called after ngAfterContentInit as well as every subsequent ngDoCheck.This method is responded after the projected content is checked.
  • ngOnInit -called for once after callngOnChanges method.

• Do you know about dependency injection?

It is an app design pattern that is used to implement angular forms and core concepts. Angular gives a smooth process with these dependencies that are injected into components and directives.

• Explain the MVVM architecture?

It includes three parts those are,

• Model-this represents business logic in the app and the data flow. 
• View-this represents the UI code which is the visual layer of user actions to the view model to get the response.
• View Model– this represents the abstract layer as a bridge between the view and the model.

This architecture removes strong coupling between each component.

Skill-Related Questions

• Have you used AOT in your angular projects? Do you recommend this?

Ahead of time or AOT includes templates that many browsers can understand. Angular browser complies before run inside the browser. This happens only one time per occasion per user. 

The compilations are,

• AOT- app compiles during the build time.
• JIT- app compiles inside the browser during runtime.

AOT can be recommended because of some reasonable facts that can be shown. The first one is fast rendering figure out the executable code loading in the browser and compiled before running inside the browser. The other point is it can detect and error handling easily during the building phase. 

• What are the limitations when you used the technology in your past work?

The major problem which I understand is the limited SEO options. Angular has poor accessibility. When there are many search engines, it can’t say this will continue longer. On the other hand, when I learn and practice this technique, it was difficult for me with complex templates, integrations, and coding parts. 

• How was your experience with angular 4 in your projects?

Angular 4 greatly impacts the integration part because it can give third-party integrations with more tools and overall functions. It was great for me because it is customizable because for that my designing purposes. The technology is a plus point to my web development more than the traditional one because it has many templates, modules, features, and functions.

Application-Related Questions

• How can we use angular in real world problems?

Angular 4 mainly purposes on web development. So real-world apps can have back-ends and can be registered and sign in with user interactions in different roles. As an example, it can be displayed ads, purchasing apps, device interactions, analytics, and camera.

Conclusion

Angular 4, one of the most widely used methodologies in the industry, mostly move with web, HTML, CSS, JS, and typescript-related templates can be run in the same way with the technology with small differences. This technology is standard for web development more than traditional to handle as a client-side framework.

This article mentioned the interview questions related to the above-discussed technology and the way you need to face in the interview to take your opportunity. So talented spirits, all the chances are around you. You must earn them in a talented way. Be the best one. Best of Luck!