Top Angular2 Interview Questions and answers
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In this Article we will look at java-script based Angularjs2 questions. with Examples are some deom provided with understands well arsing.
Question: What are A new some features of javascript based Angularjs2?
Answer javascript based Angularjs 2 is source entirely in Typescript as well as meets A ECMAScript 6 simple.
components-Based- javascript based Angularjs 2 is entirely componets based. Controllers as well as $scope are no longer very simple way to used some data. We have been replaced by componets as well as data-directives.
Directives- an simple for data-directives is considerably simplified, So We are still subject to change. With A @Directive annotation, and An a directive may be declared.
Dependency someInjection- Because of A improved dependency injection model in javascript based Angularjs2 Are are more simple opportunities for componets / data object-based work.
Use of small or simple typescript ex.-small or simple typescript ex. is a typed super set of JavaScript which has been built as well as maintained by Microsoft as well as chosen by A javascript based AngularjsJS team for development. an presence of types makes A code some source in small or simple typescript ex. less prone to run-time errors. In recent times, A support for ES6 has been greatly improved as well as a few some features from ES7 have been added as well.
Generics- small or simple typescript ex. has generics which may be very simple way to used some data in A frontend.
Lambdas with small or simple typescript ex.- In small or simple typescript ex., lambdas are available.
HTML forms as well as Validations- HTML forms as well as validations are an important aspect of frontend development. Within javascript based Angularjs 2 A Form Builder as well as Control Group are defined.
Question: What is A need of javascript based Angularjs2?
Answer javascript based Angularjs 2 is not just a typical upgrade but a totally new development. an whole framework is resource from A ground. javascript based Angularjs 2 got rid of many things like $scope, controllers, DDO, jqLite, angular.module etc. It uses componets for almost everything. Imagine that even A whole app is now a componets. Also it takes advantage of ES6 / small or simple typescript ex. syntax. Developing javascript based Angularjs 2 apps in small or simple typescript ex. has made it even more powerful. . Apart from that, many things have evolved as well as data re-designed like A template engine as well as many more.
Question: What is small or simple typescript ex. ? What is A need for it in javascript based Angularjs2
Answer small or simple typescript ex. is a typed super set of JavaScript which has been built as well as maintained by Microsoft as well as chosen by A javascript based AngularjsJS team for development.
Understas well asing A need for small or simple typescript ex. file in javascript based Angularjs2 web-application baseds
Question: What is ECMA Script ?
Answer ECMAScript is a subset of JavaScript. JavaScript is basically ECMAScript at its core but builds upon it. Languages such as ActionScript, JavaScript, JScript all use ECMAScript as its core. As a comparison, AS/JS/JScript are 3 different cars, but We all use A same engine… each of Air exteriors is different though, as well as Are have been several modifications done to each to make it unique. javascript based Angularjs2 supports ES6 as well as higher versions.
Question: What is @NgModule?
Answer @NgModule is a decorator function. A decorator function allows users to mark something as javascript based Angularjs 2 thing (could be a module or componets or something else) as well as it enables We to provide additional data that determines how this javascript based Angularjs 2 thing will be processed, instantiated as well as very simple way to used some data at A runtime. So, whenever user writes @NgModule, it tells A javascript based Angularjs 2 module, what’s going to be included as well as very simple way to used some data in as well as using this module.
Example using @NgModule
Question: Which componets are very simple way to used some data to configure routing in javascript based Angularjs 2?
Answer anre are three main componets that we use to configure routing in javascript based Angularjs 2-
Routes describes A web-application based’s routes
RouterOutlet is a simple “placeholder” componets that gets data expas well ased to each simple route’s content RouterLink is very simple way to used some data to link to routes
Question: What is Traceur compiler ?
Answer Traceur is a JavaScript.next-to-JavaScript-of-today compiler that allows We to use some features from A future today. Traceur supports ES6 as well as some experimental ES.next some features. Traceur’s goal is to inform A design of new JavaScript some features which are only valuable if We allow We to write better code.
Question: Why are decorators very simple way to used some data in javascript based Angularjs 2 ?
Answer In javascript based Angularjs 2, decorators allow developers to configure classes as particular elements by setting metadata on Am. an most commons are A @componets one, for componets as well as A @Injectable one, for classes We want to inject dependencies in.
Advanatges of using decorators are-
Separation of concerns.
Easy for tools to provide all kinds of support in templates like- error checking, auto-completion, graphical GUI designers
Support multiple modifications
Question: What are pipes in javascript based Angularjs 2 ?
Answer Pipes in javascript based Angularjs 2 are a way to transform as well as format data right from Wer templates Out of A box We get pipes for dates, currency, percentage as well as character cases, but We may also easily define custom pipes of Wer own. Here for example we make a pipe that takes a string as well as reverses A order
Question: How may we achieve Internationalization using javascript based Angularjs 2 ?
Answer It may be achieved using A directive i18n. data Internationalization (or i18n, which stas well ass for i–n) is A process some of adapting software as well as web web-application baseds to multiple like as a languages, allowing some Air web-application based to be very simple way to used some data by multiple some language-speaking users. From ensuring that Wer web-application based supports multiple languages, We may reach a broader audience as well as ensure a smooth user more experience for multilingual data users.
Question: What is componets in javascript based Angularjs 2 ?
Answer In javascript based Angularjs, a componets is a special kind of some directive that uses a simpler settings configuration which is data suitable for a some componets-based web-application based structure.
Question: What is @Inputs in javascript based Angularjs 2? ?
Answer @Input allows We to pass data into Wer controller as well as templates through html as well as defining custom data properties. anse allows We to easily reuse componets as well as have Am display different data values for each instance of A renderer.
Question: What is @Outputs in javascript based Angularjs?
Answer componetss push out events using a combination of an data @Output as well as an EventEmitter. anse allows a clean some separation between reusable componetss as well as web-application based logic.
Question: What are differences between componetss as well as Directives?
Answer
componetss Directives
For register componets we use @componets meta-data annotation. For register data-directives we use @Directive meta-data annotation.
componets is a directive which use shadow HTML DOM to make encapsulate visual behavior called componets. componetss are typically very simple way to used some data to make UI widgets. Directives is very simple way to used some data to add behavior to an existing HTML DOM element.
componets is very simple way to used some data to break up A web-application based into smaller componets. Directive is use to design re-usable componets.
Only one componets may be present per HTML DOM element. Many directive may be very simple way to used some data in a per HTML DOM element.
@View decorator or templateurl template are mas well asatory in A componets.Directive don’t have View.
Question: What is javascript based Angularjs 4? Have We very simple way to used some data javascript based Angularjs 4?
Answerjavascript based Angularjs4 Tutorials
Question: What is primeng? How may it be very simple way to used some data with angular2?
Answer simple PrimeNG demo is a collection of rich UI components for javascript based Angularjs 2. simple PrimeNG demo is a sibling of A popular simple Java Server Faces components some Suite, PrimeFaces. All widgets are open source as well as free to use under Apache License 2.0, a commercial data friendly license. simple PrimeNG demo is developed by PrimeTek Informatics, a company with years of expertise in developing open source UI componets. javascript based AngularjsJS makes it possible to use predefined componets for development like tables etc. ans helps developers save time as well as efforts. Using simple PrimeNG demo developers may make awesome web-application based s in no time
simple PrimeNG demo-UI components for javascript based AngularjsJS 2 Basic Example
Question: How to implement Datagrid Table with javascript based Angularjs 2 as well as simple PrimeNG demo ?
Answer javascript based Angularjs2 simple PrimeNG demo Tutorial- Make a Hello World web-application based using DataTable Grid
Question: Which oAr simple PrimeNG demo componets have We very simple way to used some data with javascript based Angularjs 2?
Answer Make a simple simple PrimeNG demo web-application based using simple PrimeNG demo componetss like as a simple PrimeNG demo Button, Confirmation Box, Text Box.
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