Top 10 Questions To Crack Your Angular Interview

Angular is the best open-source and typescript version that helps you build simple web applications, and frees you from many of the challenges that developers face. With that, it increases the number of developers working on it and increases the competition. To stand out in the crowd having practical knowledge is not enough. The interviewers ask the most basic and crucial questions to understand how deep your logic stands. Let us know about the ‘Top 10 Questions To Crack Your Angular Interview’.

Top 10 Questions To Crack Your Angular Interview

10 Questions To Crack Your Angular Interview

Just covering the topics of Angular might not help you in the long run. Yes, it is difficult to cover everything in one night to pass through your interview. One might have no clue from where to begin and in turn, you might go through topics that are not relevant to your interview.

In this article, we have curated the most frequently asked questions by all interviewers across the globe. We have covered questions from basic to slightly advanced levels, to have a basic understanding.

By going through our Angular 2 Interview Questions and Answers page, which contains well-organized questions and answers, you can easily crack an Angular 2 job interview and take a winning position.

Let’s get started with our top 10 questions to crack your angular interview frequently asked questions to help you get started for your next interview.

1. Difference between Angular JS and Angular?

Angular JS is based on JavaScript whereas Angular is based on TypeScript. Angular JS uses a controller-based architecture whereas Angular uses a component-based architecture. Angular JS doesn’t have a mobile-friendly environment whereas Angular builds a mobile support environment.

2. What are directives and different types of derivatives in Angular?

Directives are angular syntax that adds behavior to elements in our angular application.

<input [(ngMode)] = “currentItemName” type = “text” value = ” “ >

There are three types of derivatives:

  • Structural derivative: Structural derivative manipulates the DOM layout by adding or removing DOM elements
  • Attribute derivate: Attribute derivative manipulates the appearance or behavior of the DOM layout without affecting the structure of the DOM.
  • Component derivative: Components are the most basic UI building block of an angular application. We can say that component is a user-customized user control that we can use to build our angular application and define our own component by using add component decorator.

3. What are @input and @output in angular 2?

@input and @output are decorators. To bind a property within one child component to receive value from the parent component we use the @input decorator, whereas to bind the property of a component to send data from the child component to the parent component or calling component we use the @output decorator.

4. What is the difference between directives and components?

Directives add behavior to the existing DOM elements whereas a component instead of adding or modifying the behavior of an existing element creates its own view with an attached behavior. Also, we can have many directives per DOM element but there can be a single component present per DOM element. We don’t have views attached to the directives whereas components always come with a view.

We use add directive decorator for a directive and add component decorator for a component.

5. List some advantages of angular 2 over angular 1.

Angular 2 is a rewritten version of Angular 1.

Angular 1 was not developed for a mobile-based environment whereas angular 2 is a mobile-oriented framework. In angular 1 we don’t have many choices of languages. The angular 1 code can be written using mainly ES5, ES6, and dart. But in angular 2 we can use ES5, ES6, Typescript, or Dart.

Angular 1 was particularly based on controllers whose scope is now over whereas in angular 2 the controllers are now replaced by components making angular 2 components based.

To pass external data from different components to a directive by using @input data binding.

6. How does routing work in angular 2?

Routing helps to navigate between different views and components. The angular has a single instance of the router server. Routing builds a tree of active route objects and contains the current state of the router.

7. How many types of route guards are there in Angular?

There are four types of route guards in angular:

  • CanActive: it decides if a route can be activated.
  • CanActiveChild: it decides if children’s route of route can be activated.
  • CanDeactivate: it decides if a route can be deactivated.
  • CanLoad: it decides if a module can be loaded lazily.

8. What is a decorator in angular?

Decorator is a function or a feature provided by TypeScript language that tells angular the intent of the class. We can attach metadata to a class, method, accessor, property, or parameter.

9. What is angular CLI?

Angular CLI is a command line interface by which we can create an initial angular project template. Therefore, rather than starting from scratch, we have some boilerplate code.

10. What are data binding and the different types of data binding?

Data binding defines how the view and component communicate with each other.

There are four types of data binding:

  • Expression/ Interpolation {()}: In expression data binding data flows from the component to the view and we can mix the same with other HTML tags.
  • Property binding []: In property binding data flows from the component to the view.
  • Event binding (): Event binding is mainly used when you want to send an event from the view to the component.
  • Two-way binding [()]: In two-way binding data flows from the component to the view and vice versa.


As mentioned earlier, developers skilled in Angular programming can earn very favorable salaries. As mobile apps become more popular, there are more opportunities for a career in programming.

Don’t stop here, start learning from the basics, and prepare yourself so that you make your mark in the field of development.

We hope these questions will bring confidence in you and help you ace your next angular interview.

We wish you all the best!

Top 10 Questions To Crack Your Angular Interview

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