Sudheerj Angular Interview Questions

Preparing for getting your dream job of an Angular developer? Or, simply planning to switch to being an Angular developer? In this article, we’re going to look at some of the frequently asked angular questions that you can expect to be coming your way during an Angular interview for the role of an Angular developer.

In addition to these concept-based questions, there will be a requirement for a (or maybe multiple) coding test(s). If you want to revise important Angular concepts before the interview, The Complete Angular Course: Beginner to Advanced course from udemy will prove to be of great help. Along with Angular questions, youll also be asked generic interview questions. Here is a top 189 Programming Questions and Solutions that will bring you up to speed really fast.

Angular Interview Questions
  1. Why were client-side frameworks like Angular introduced? …
  2. How does an Angular application work? …
  3. What are some of the advantages of Angular over other frameworks? …
  4. List out differences between AngularJS and Angular. …
  5. What is AOT compilation? …
  6. Explain Components, Modules and Services in Angular.

Angular Interview Questions and Answers | Angular Interview Questions | Top Angular Questions

What is scope in Angular?

Scope in Angular is an object that refers to the application model. It is an execution context for expressions. Scopes are arranged in a hierarchical structure which mimics the DOM structure of the application. Scopes can watch expressions and propagate events.

What is the difference between an Annotation and a Decorator in Angular?

Annotations in angular are “only” metadata set of the class using the Reflect Metadata library. They are used to create an “annotation” array. On the other hand, decorators are the design patterns that are used for separating decoration or modification of a class without actually altering the original source code.

What are decorators in Angular?

Decorators are a design pattern that is used to separate modification or decoration of a class without modifying the original source code. In AngularJS, decorators are functions that allow a service, directive or filter to be modified prior to its usage.

Decorator that marks a class as an Angular component and provides configuration metadata that determines how the component should be processed, instantiated, and used at runtime.

What are templates in Angular?

Templates in Angular are written with HTML that contains Angular-specific elements and attributes. These templates are combined with information coming from the model and controller which are further rendered to provide the dynamic view to the user.

Differentiate between one-way binding and two-way data binding.

In One-Way data binding, the View or the UI part does not update automatically whenever the data model changes. You need to manually write custom code in order to update it every time the view changes.

Whereas, in Two-way data binding, the View or the UI part is updated implicitly as soon as the data model changes. It is a synchronization process, unlike One-way data binding.

What is subscribing?

In Angular, .subscribe() is basically a method on the Observable type. The Observable type is a utility that asynchronously or synchronously streams data to a variety of components or services that have subscribed to the observable. Subscribe takes 3 methods as parameters each are functions:

  • next: For each item being emitted by the observable perform this function
  • error: If somewhere in the stream an error is found, do this method
  • complete: Once all items are complete from the stream, do this method

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