Ember JS Interview Questions

Ember JS Interview Questions

Following are some of the most frequently asked Ember JS interview questions in the interview, here are the answers for them.

What is EmberJS?

It is javasScript framework based on Model-view-controller(MVC) and written in javascript. It allows developers to create scalable single-page web applications by incorporating common idioms.
In this, Route is used as model, template as view and controller manipulates the data in the model.

What is old name of EmberJS?

SproutCore MVC framework

In which language, EmberJS is written?

javaScript

Explain what Ember.js is and how it works?

Ember.js is used for creating web applications that eliminates boilerplate and at the same time provides a standard application architecture.

Ember helps to create applications, whose logic runs in browser and also it does not require server requests to functions. Ember update the DOM directly and instantly when any user interacts with things like button and text boxes on the browser page.

Explain how ember applications are structured?

The application ember.js is based on MVC (Model, View, Controller) structure

Models: It defines the data that is used in an application
Controllers: It modifies query and edit the data and provide user interactions
Views: It display the data and capture user actions

Explain how is ember.js is different than traditional web application?

In Ember.js, instead of majority of your application’s logic living on the server, an ember.js application downloads everything it required to run in the initial page load. So user does not have to load a new page while using the app and UI will responds quickly. The advantage of this architecture is that your web application uses the same REST API as your native App.

Explain what is the difference between Router and Route in ember.js ?

Router: It is the connecting point between browser’s address bar and our application. It translates address into Route

Route: It is where a user request will land after it was translated by a Router. Route decides what data should be provided to the Template

Explain what is serializer?

For turning a raw JSON ( JavaScript Object Notation ) payload returned from your server into a record object a serializer is responsible. JSON APIs may represent attributes and relationship in many different ways.

How you can define a new ember class?

You can use call the extend () method on Ember.object to define a new ember class

Explain how you can create an Ember. handlebars template ?

Call Ember.Handlebars.Compile() to create an ember.handlebars template. It will return a function which can be used by ember.view for rendering.

Explain what is Ember-data ?

Ember-Data is a library that retrieve records from a server, store them, update them in the browser and save them back to the server.

Explain the role of adapter and types of adapters ?

Adapter queries the back end, each adapter is made up of particular back end. For example Rest adapter deals with JSON APIs and LSAdapter deals with local storage.

What are basic models of EmberJS?

Routes: State of application is represented by URL and each URL has a corresponding route object that.

Models: Use to load data from Server.

Templates: This is html of layout.

Components: It is custom tag.

Services: Services are just singleton objects to hold long-lived data such as user sessions

What are the Features of EmberJS?

Creating reusable modules

Handlebars Templates

Automatice determines the route and controller during declaration of the route resources

Used routes

Extensive view type support.

Easy to configure

What is Enumerables in Ember.js ?

enumerable is any object that contains a number of child objects, and enables you to work with those children using the Ember.

Explain Application Template ?

Application Template is a default template that is used when your application starts.

Explain the role of adapter?

Adapter queries the back end, each adapter is made up of particular back end.

Explain How You Can Create Instances In Ember.js ?

You can create a new instances once you have defined the class by calling its create() method. Any properties or methods you defined on the class will be available to instances.

Explain What Is The Use Ember.sortablemixin ?

For array proxies Ember.SortableMixin provides a standard interface to specify a sort order and maintain this sorting when objects are updated, removed or added without changing the order of the underlying model array.

List out main components of Ember.js?

Models

The Router

Controllers

Views

Components

Templates

Helpers

Why I use EmberJS?

Open source JavaScript framework

Flexible framework that embraces the concept of fast web page

It has smaller size as compare to other library

Data binding Support

What are different template components in Ember.js?

-Partial

-View

-Render

-Yield

-Outlet

When First EmberJS was released?

December 08, 2011

When latest EmberJS was released?

November 16, 2015

Who created EmberJS?

Yehuda Katz

Explain what is Enumerables in ember.js ?

In Ember.js an enumerable is any object that contains a number of child objects, and enables you to work with those children using the Ember.Enumerable API. Native JavaScript array is the most common enumerable in majority of Apps.

Explain what is ember.mixin class ?

Ember.mixin class can create objects, whose functions and properties can be shared among other instances and classes. This will help to share behaviour between objects as well as design objects.

Explain how you can create instances in ember.js ?

You can create a new instances once you have defined the class by calling its create() method. Any properties or methods you defined on the class will be available to instances.

Explain how you can add data using fixture into an application?

In order to put sample data into an application before connecting the application to long term persistence, fixtures are used.

-First update js/application.js to indicate that your application’s application adapter is an extension of the DS.FixtureAdapter.  Adapters are used for communicating with a source of data for your application.  Usually, this will be a web service API.

-Next, update the file at js/models/todo.js

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