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Wipro Angular Interview Questions

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Wipro – Angular Interview Questions

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


As per my observation, the Company conducts three rounds for the selection process. These rounds are as follows:
  1. Written Exam
  2. Technical Interview
  3. HR Interview

Wipro Angular Interview Questions

1.What is an Angular Material?

Angular Material is a User Interface component library. It provides

  • reusable UI components,
  • speeds up the development of consistent user interfaces.

It enables professionals to create a uniform, fully functioning website, web pages, and web apps.

2. What is Angular framework?

AngularJS is an open-source web application framework. AngularJS is a structural framework for dynamic web applications. It lets you use HTML as your template language and lets you extend HTML's syntax to express your application components clearly and succinctly.

3. 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.

4. What is a decorator in Angular?

Decorators are functions that define the working of Angular features. It is used to isolate the decoration of a class without code modification. The main purpose of Angular decorators is to store metadata about a class, method, or property. The types of decorators are:

  • Class.
  • Property.
  • Method.
  • Parameter.

5. What is the difference among "declarations", "providers" and "import" in NgModule?

  • Declarations are used to make directives from the current module available to other directives in the current module.
  • providers are used to make services and values known to DI. They are added to the root scope and they are injected to other services or directives that have them as dependency.
  • import makes the exported declarations of other modules available in the current module.

6. What are the key components of Angular?

The few key components are
  • Templates represent the views of an Angular application.
  • Serviceis used to create components which can be shared across the entire application.
  • Metadata can be used to add more data to an Angular class.
  • Databinding: Binding markup is responsible for connecting application data with the DOM.

7. Explain the Architecture overview of Angular.

Angular is a framework for building client applications in HTML and either JavaScript or a language like Type Script that compiles to JavaScript. The framework consists of several libraries, some of them core and some optional. Then you launch the app by bootstrapping the root module

8.What are the key benefits of using Angular as a framework?

  • Angular is an opinionated platform that allows users to build scalable user interfaces.
  • Angular's forms and routing provide stability and integration.It makes easy development of web applications.
  • Angular framework provides two-way data binding that synchronizes the data between Model and View.
  • Angular uses TypeScript which is a strongly typed language.It is easier to read and maintain.
  • To create an enjoyable development experience, Angular is compatible with a large network of libraries, tools, frameworks.

9. Static and public in angular

The static members can be defined by using the keyword static TypeScript includes the keywords public, protected, and private to control access to the members of a class i.e. properties or methods.

10. Difference between Promises and observable

The observables and promises help us work with asynchronous functionality in JavaScript. Promises deal with one asynchronous event at a time, while observables handle a sequence of asynchronous events over a period of time.

11. Reversing a number in an array

reverse() method reverses the element of an array. The first array element becomes the last and the last becomes the first.

Syntaxarray.reverse();

Return Value

Returns the reversed single value of the array.

12. TypeScript data type

The Common data types in TypeScript are: number , string , boolean , enum , void , null , undefined , any , never , Array and tuple.

13. What is strict mode in JS?

JavaScript's strict mode, introduced in ECMAScript 5, is a way to opt in to a restricted variant of JavaScript, thereby implicitly opting-out of "sloppy mode".It eliminates some JavaScript silent errors by changing them to throw errors.

Free PDF : Get our updated Angular Course Content pdf

14.What do you mean by String Interpolation?

string interpolation is the process of evaluating a string literal that contains one or more placeholders. It yields a result in which the placeholders are replaced with their values.String interpolation in Angular is used to display dynamic data on an HTML template.

15. What is Do Bootstrap (ng Do Bootstrap) In Angular 7?

The Angular version of the Angular UI Bootstrap library is built from scratch by the ui-bootstrap team using TypeScript and Bootstrap 4 CSS framework. Recently it was updated to use Angular 7 and can use ngx-bootstrap: It contains all core Bootstrap components powered by Angular.

16. What is an AOT compilation in Angular?

The Angular ahead-of-time (AOT) compiler converts the Angular code into JavaScript code. The conversion happens before the browser downloads and runs the code. To achieve faster rendering in the browser, Compile your application during the build process.

17. What are modules in Angular?

A module is a mechanism or container to group the components, directives, pipes and services.It helps to encapsulate the code that deals with several aspects of an application. Developers can create modules using the NgModule decorator.

18. What is the difference between component and directive?

Component is a directive which use shadow DOM to create encapsulate visual behavior called components whereas directives is used to add behavior to an existing DOM element. Component is used to break up the application into smaller components. Directive is use to design re-usable components.

19. What is the Document Object Model?

The Document Object Model (DOM) is a programming API or object oriented representation for web documents. It represents the page and allows you to make changes. The DOM follows traditional object oriented design.

20. What is a module?

The module is a mechanism to group components, directives, pipes and services that are related and can be combined with other modules to create an applicationModule.

21. What does Angular Material mean?

Angular Material is a User Interface component library. It is used to speed up the development of the user interfaces. Angular Material offers reusable and beautiful UI components.It allows to develop fully functional web pages,and applications.

22. Whats is output for typeof (null);

thetypeof operator always returns a string with the type of the operand passed to it. If the resultant type of the expression is, for example, a number, what will be returned is "number”.

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

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

24. What is Shadow DOM?

Shadow DOM basically allows group of DOM implementation to be hidden inside a single element and encapsulate styles to the element. Shadow DOM tree starts with a shadow root,underneathwhich can be attached to any elements.

25. What is Buffer (window storage)?

A buffer is like a cache that is a data area of computer memory (RAM) reserved for temporary storage. For example, when you press several keys in quick succession on the keyboard, the commands are stored momentarily in a buffer, allowing the computer to process them in the correct order.

26. How did you hidden (not hide) the element in JQuery?

hide ()-The matched elements will be hidden immediately, with no animation. The jQuery: hidden selector can be used to test whether an element is hidden or not on a page.

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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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