Hexaware – Angular Interview Questions

Here is the list of Angular Interview Questions which are recently asked in Accenture company. These questions are included for both Freshers and Experienced professionals. Our Angular Training has Answered all the below Questions.

1. What Is Angular Js?

AngularJS is a client-side JavaScript Model-View-Controller (MVC) framework used for developing rich and extensible web applications. It mainly runs on plain JavaScript, HTML and is suitable for Single Page Applications (SPA).

2. What Is Data Binding In Angular Js?

Data-binding in AngularJS apps is the automatic synchronization of data between the model and view components which is a projection of the model at all times.AngularJS implements data-binding in such a way that it allows treating the model as the single-source-of-truth in your application.

3. What Is Scope In Angular Js?

Scope is a JavaScript object that refers to the application model and it acts as a context for evaluating Angular expressions and acts as the glue between a controller and a view. Scopes are hierarchical in nature and follow the DOM structure of the Angular JS app.

4. What Are The Services In Angular Js?

AngularJS services are substitutable objects that are wired together using dependency injection (DI). Use services to organize and share code across the app. These are lazily instantiated and only instantiates a service when an application component depends on it.

5. What Are The Filters In Angular Js?

AngularJS Filters allow formatting the data to display on UI without changing original format. Filters can be used with an expression or directives using pipe | sign.

6. Explain Directives In Angular Js

Directives are markers on a DOM element that tell AngularJS to attach a specified behavior to that DOM element or even transform the DOM element and its children. Most of the directives in AngularJS are starting with ng- where ng stands for Angular.

7. Explain Templates In Angular Js.

Templates in AngularJS are simply an HTML file filled or enriched with AngularJS stuff like attributes and directives which is a marker element that is used to target a particular attribute or class to render its behavior as according to the needs.

8. What Is Deep Linking In Angular Js?

Deep linking is a usage of the URL which will tack the specific page Content without traversing application home page. It helps for the indexed so that this link can be easily searchable by the SEO like google yahoo, etc.

9. What Are The Advantages Of Angular Js?

  • Two-way data binding.
  • DOM manipulation,The MVVM architecture.
  • Improved Server Performance.
  • Faster Application Prototyping.
  • Responsive Web and Use of Directives.
  • Highly Testable Products.

10. When using ngIf if the condition is true. how to display the message and if the condition is false then how to display the message?

OR condition in *ngIf

If you want to display the element with *ngIf only if one of the condition is true. We can use OR (||) operator

11. How did you get the value from input box using JQuery?

To get the textbox value, use the jQuery val() function. For example, $('input:textbox'). val() – Get textbox value

12. What are the directives available in router?

ngView directive is used to display the HTML templates or views in the specified routes. Every time the current route changes, the included view changes with it according to the configuration of the $route service.

13. Write syntax for component, directives and pipe decorator?

To create a component using the Angular CLIlink

From a terminal window, navigate to the directory containing your application. Run the ng generate component

<component-name>command, where <component-name> is the name of your new component.

Mapfile directives exist to specify many aspects of the output object. These directives share a common syntax, using name value pairs for attributes, and {...} directive. The next form is a directive name with a value, or a white space separated list of values.

To Create Custom Pipes in Angular

Create a Pipe Class and decorate it with the decorator @Pipe. So supply a name property to be used as template code name. Register the Pipe in the module under declarations. Finally, implement PipeTransform and write transformation logic.

14. In template driven form ________ object is created internally whenever we have below code

Template driven forms are forms where we write logic, validations, controls etc., in the template part of the code (html code). The template is responsible for setting up the form, the validation, control, group etc.

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15. How To Implement Internationalization In Angular Js?

The two approaches to providing locale rules to AngularJS:
  • Pre-bundled rule sets with AngularJS by concatenating the content of the locale-specific file to the end of angular. js or angular.
  • Including a locale script in index. html.

16. Is Angular Js Extensible?

AngularJS is a toolset for building the framework most suited to your application development. It is fully extensible and works well with other libraries. Every feature can be modified or replaced to suit your unique development workflow and feature needs.

17. What Are Angular Js Expressions?

Expressions are used to bind application data to HTML and written inside double curly braces such as in {{ expression}}. They are pure JavaScript expressions and output the data where they are used.

18. Explain Angular Js Boot Process.

Understanding AngularJS Bootstrap Process
  • Load the module associated with the directive.
  • Create the application injector.
  • Compile the DOM starting from the ng-app root element

19. What is TypeScript?

Simply,TypeScript is a free,open source programming language. It is developed by Microsoft. TypeScript is a syntactical superset of JavaScript. It is recommended for its consistency. So It is easy to maintain and comfortable to interpret.

20. Please explain unit testing in angular?

A unit test is a way of testing a unit - the smallest piece of code that can be logically isolated in a system. In most programming languages, that is a function, a subroutine, a method or property. The isolated part of the definition is important. ... Unit testing is here to stay.

21. What is json web token in angularjs?

JSON Web Token is a standard used to create access tokens for an application. It works this way: the server generates a token that certifies the user identity, and sends it to the client.

22. What is AngularJS architecture?

Angular JS Architecture

Model − It is the lowest level of the pattern responsible for maintaining data. View − It is responsible for displaying all or a portion of the data to the user. Controller − It is a software Code that controls the interactions between the Model and View.

23. What is the difference between factory and service in AngularJS?

The major difference between an AngularJS service and an AngularJS factory is that a service is a constructor function and a factory is not. In the case of a factory, we return an object literal instead of using this so that service calls a predefined factory.

24. How do we include css file ins. the component except using styleUrls property?

Angular components can be styled via global CSS the same as any other element in the application. Simply drop a `` element on the page (typically in index. html) and it’sgood to go! However, Angular additional gives developers more options for scoping your styles.

25. ln component and service which logic that we have to write?

Components define views, which are sets of screen elements that Angular can choose among and modify according to the program logic and data. Components use services, which provide specific functionality not directly related to views.

26. In JSON have one array then how to assign this array to an variable.

Arrays in JSON are almost the same as arrays in JavaScript.In JSON, array values must be of type string, number, object, array, Boolean or null.

27. How do you interact between two components?

Component interaction
  • Pass data from parent to child with input binding.
  • Intercept input property changes with a setter and ngOnChanges()
  • Parent listens for child event and interacts with child using local variable.
  • Parent calls an @ViewChild()

28. Explain the procss about angular project bootstrap?

Angular. bootstrap is a function component in the core ng module that is used for starting up the Angular application manually, which gives more control over how to initialize the application.

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TOP MNC's ANGULAR INTERVIEW QUESTIONS & ANSWERS

Here we listed all Angular Interview Questions and Answers which are asked in Top MNCs. Periodically we update this page with recently asked Questions, please do visit our page often and be updated in Angular .

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