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Aspire Systems Angular Interview Questions

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Aspire – Angular Interview Questions

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


1. What is deep linking in angular 4?

Deep linking is the usage of the URL, which will take to specific page directly without traversing application from home page. It helps in getting indexed so that these links can be easily searchable by search engines like Google, Yahoo etc.

2. How to use primeng in angular 4?

The animation module is required by many PrimeNG's components and the form module will be needed to use form input components like the radio button component. Browse through the node_modules directory under /primeng/components if it is needed to find a component name.

3. Why angular 4 is faster?

Angular 4 is faster with less AOT time in its compiler-generated code, it is smoother and swifter than both AngularJS and 2. Angular 2 supports the 1.8 version of Typescript, while Angular 4 can easily support its higher version- 2.1 and 2.2.

4. What is the difference between Angularjs 4 and AngularJS?

Angular 4 is the latest version of Angular when compared to AngularJS. Although Angular 2 was a complete rewrite of AngularJS, there are no major differences between Angular 2 and Angular 4. Angular 4 is only an improvement and is backward compatible with Angular 2.

5. What is shadow dom?

The Shadow DOM is part of Web Components, which encapsulates styles and login of the elementto HTML Elements. Using the Shadow DOM, markup, styles, and behaviors are scoped to the element and do not clash with other nodes of the DOM

6. How to debug angular 4 projects from visual studio 2017?

  • Make sure VS Code, Google Chrome, and all the Angular parts are already installed.Install the Debugger for Chrome extension in VS Code and create a launch.json config file.
  • Set an appropriate config spec in the .vscode/launch.json file and set breakpoints in the editor.
  • Launch the Angular app separate from the debugger and run the VS Code debugger “launch” job against the app.

7. Explain angular 4 providers.

Providers are classes that create and manage service objects the first time that Angular needs to resolve a dependency and used to register the classes to an angular module as a service.

8. String inbuilt function

Function Description
IsString To identify if a reference is string.
IsNumber To identify if a reference is number.
IsDate To identify if a value is date.

9. Service and Guard

Angular route guards are interfaces which when implemented allow us to control the accessibility of a route based on condition provided in class implementation of that interface. Five types of route guards are provided by angular:
  • CanActivate.
  • CanActivateChild.
  • CanLoad.
  • CanDeactivate.
  • Resolve.

10. Observable in angular

Observable are things to observe and take action on. Angular uses the Observer pattern which simply means — Observable objects are registered, and other objects observe them and take action when the observable object is acted on in some way.

11. What are the inbulit angular directives

Directives are classes that add additional behavior to elements in the Angular applications. With Angular's built-in directives, you can manage forms, lists, styles, and what users see.The different types of Angular directives arecomponents, attribute, and structural directive.

12. How to find missing number in an array

Approach: The length of the array is n-1. So the sum of all n elements, i.e sum of numbers from 1 to n can be calculated using the formula n*(n+1)/2. Now find the sum of all the elements in the array and subtract it from the sum of first n natural numbers, it will be the value of the missing element.

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13. What is the use of services in angular 4?

Angular services are for building out code that can be shared across multiple components. And these are singletons. Services restrict the instantiation of a class to one object. It means the methods and properties can be shared throughout your application from a single shared instance.

14. Why we need Ngmodel in angular 4?

ngModel is a directive which binds input, select and textarea, and stores the required user value in a variable and we can use that variable whenever we require that value. It also is used during validations in a form.

15. What is Angular 4 and why it is used?

Angular is a platform and framework for building single-page client applications using HTML and TypeScript. It implements core and optional functionality as a set of TypeScript libraries that you import into your applications.

16. What are the new features in Angular 4?

  • TypeScript Compatibility.
  • Dynamic Components.
  • Source Maps for Templates.
  • Router ParamMap.
  • AOT Compilation.
  • Revamped *ngIf and *ng For.
  • Animations Package.

17. Explain the difference between angular 2 and 4?

Angular 4 is the latest version of Angular when compared to Angular JS Although Angular 2 was a complete rewrite of AngularJS; there are no major differences between Angular 2 and Angular 4. Angular 4 is only an improvement and is backward compatible with Angular 2.

18. Explain the difference between angular and AngularJS?

The TypeScript that Angular uses is a superset of ES6, which has backward compatibility with ES5. Angular JS, based on JavaScript, uses terms of scope and controllers while Angular uses a hierarchy of components. Angular is component-based while AngularJS uses directives

19. How we can set Http Request Header in Angular 2 and Angular 4?

The HTTP Interceptors are used to Set Http Headers Request in Angular 4 using the import from “@angular/common/http”. The HTTP Interceptors are available in Angular 4.

20. How to create a new component using CLI in Angular 4?

To create a component using the Angular CLI: From a terminal window, navigate to the directory containing your application. Run the ng generate component command, where is the name of your new component.

21. How to find missing number in an array


	var a = [5],
count = 5;
var missing = new Array();
for (vari = 1; i<= count; i++) {
if (a. indexOf(i) == -1) {
missing. push(i);}
	

22. Indexof() If the given value is not in the string / array it will return what?

The indexOf() method returns the first index at which a given element can be found in the array, or -1 if it is not present.

23. Semantic element in HTML?

A semantic element clearly describes its meaning to both the browser and the developer. Examples of non-semantic elements:

<div> and <span> - Tells nothing about its content. Examples of semantic elements: <form> ,<table> , and <article> - Clearly defines its content.

24. What is event distner and Host distner in Angular?

HostListener - Declares a host listener. Angular will invoke the decorated method when the host element emits the specified event. @HostListener - will listen to the event emitted by the host element that's declared with @HostListener .HostBinding - Declares a host property binding.

25. Why do we use Angular instead of React JS?

Angular is a full-fledged framework, while React is a library. React JS uses virtual DOM and one-way data binding while Angular operates on real DOM & two-way data binding.

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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 .

Accenture
Cognizant
Virtusa
Shenll Technology
Hexaware
Wipro
IBM
Aspire Systems
FIS
Infosys
Capgemini
L & T
Amazon
Mindtree
HCL

To become a Angular Certified professional and join in your dream company, Enroll now for our Best Angular Training. We help you to crack any level of Angular Interviews and We offering Angular Training with 100% Placements.

other top mnc Angular Interview Q&A

  • Accenture
  • wipro
  • capgemini
  • Cognizant
  • IBM
  • L&T
  • Virtusa
  • Aspire Systems
  • Amazon
  • Shenll Technology
  • FIS
  • MindTree
  • Hexaware
  • Infosys
  • HCL

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