IBM Angular Interview Questions

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

IBM conducts 3-4 rounds to select fresher as Software Developer in their organization.

Aptitude test
Technical interview
HR interview

HR Rounds:

Sometimes they asked HR Questions like:

Tell me about yourself.
Why IBM?
What are your Strength and Weakness?
Question from Resume
Questions form Internship/prior projects

IBM Angular Interview Questions and Answer

1. What is Event Handling?

Event handling in AngularJs is very useful when you want to create advanced AngularJs applications.

2. What is RxJS?

Reactive Extensions is a JavaScript library that follows a powerful, functional approach that deals with events and integration points. It uses observables to compose callback-based code.Angular uses RxJs Observables as an internal implementation mechanism.

3. What Is Typescript ?

TypeScript is a free, open source programming language which is the strict superset of JavaScript, developed and maintained by Microsoft. It adds optional static typing and class-based object-oriented programming to the language.

4. What is the purpose of FormBuilder?

FormBuilder is an add-on application for easily creating instances for the new Forms.It reduces the boilerplate needed to build complex reactive forms.

5. What Is Ecmascript ?

ECMAScript is the scripting language standardized by ECMA International in the ECMA-262 specification. ECMAScript is a language specification and many languages follow and implement the ECMAScript specification, e.g., JavaScript, ActionScript.

6. What Is @ngmodule?

NgModules consolidate components, directives, and pipes into cohesive blocks of functionality, focused on a feature area, application business domain, workflow, or common collection of utilities and provides services to be used by other application components.

7. What Is Traceur Compiler ?

Traceur is a JavaScript compiler popularly used while developing code in AngularJS. It takes ECMAScript Edition 6 (ES6) which includes classes, generators, destroying, etc. and compiles to ECMAScript Edition 5 (ES5) which runs into the users’ browser.

8. What is the benefit of Automatic Inlining of Fonts?

The main feature of Angular 11.0. 0 is automatic font lining. Angular CLI downloads and inline fonts during compile time. It speeds up the first contentful paint(FCP).

9. What is a service in Angular?

An Angular service is a stateless object and provides some very useful functions that can be invoked from any component of Angular, like Controllers, Directives, etc. It helps in dividing the web application into small, different logical units which can be reused.

10. What Is Primeng? How Can It Be Used With Angular2?

PrimeNG is a rich UI component collection dedicated to Angular. Widgets present here are completely open-source and free to use. It’s simple, lightweight yet powerful and optimized for responsive cross-browser touch.

11. You can access HTML local reforence alias in component’s typescript code using __________ decorator.

Within the Angular component, use the viewchild decorator that Angular provides in order to bind to the previously created template reference variable.

12. In Angular. you can pass data from parent component to child component using.

Using Input Binding: @Input – To use this directive inside the child component to access the data sent by the parent component.

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

The jQuery: hidden selector can be used to test whether an element is hidden or not on a page.

14. 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 your application.

15. We must import _______ module to use [ (ngModel)]

To use NgModel we need to import FormsModule and add it to imports attribute of @NgModule in our module file.

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16. What Are Differences Between Components And Directives?

Components have their own view (HTML and styles). Directives are just “behavior” added to existing elements and components. Component extends Directive because of that there can only be one component on a host element, but multiple directives.

17. What is angular CLI?

The Angular CLI is a command-line interface tool. It is used to create angular apps. Angular CLI doesn’t need time to install and configure the dependencies.It is used to initialize, develop and maintain Angular applications directly.The Angular CLI is used to create components, services, pipes, directives and more.

18. What are annotations in Angular ?

An annotation is a comment added to provide explanation. It is normally added to articles or to literary works. Annotation is metadata added to the Angular code.

19. What Is The Languages That You Can Use To Build Angular2 Application?

With AngularJS 2 coming out, the documentation is suggesting three languages:Typescript,Javascript and Dart Angular 2 applications can be developed in two flavors of JavaScript (ES5 and ES6), in Dart, or in TypeScript.

20. What are pure Pipes?

Angular pipes are simple functions that transform the format of output data.Pure pipes are pipes that are executed when pure change is detected in the input value. It employs pure functions.

21. What is the use of ngFor directive in Angular?

The *ngFor directive is used to repeat a portion of HTML template once per each item from an iterable list (Collection). The ngFor is an Angular structural directive and is similar to ngRepeat in AngularJS.

22. 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.

23.Which technologies are used in Angular?

Angular uses several advanced technologies to complete diverse tasks efficiently.

Node package manager
Angular CLI
HTML,CSS
TypeScript
RxJS
Git

24. What is metadata in Angular?

Metadata is used to decorate a class so that it can configure the expected behavior of the class. The component decorator is used to declare the class in the app. component.

25. What is Single Page Application (SPA)?

A single-page application (SPA) is a web application or website that interacts with the user by dynamically rewriting the current web page with new data from the web server, instead of the default method of a web browser loading entire new pages.

26. If you provide a service in two components “providers” section of @Component decorator, how many instances of service shall get created?

Service is a class that is specific encompassing any value, functions, or feature that an application needs with a narrow, well-defined purpose. One instance will be created if we provide a service in 2 components because Service is a singleton object.

27. Explain Call and apply method?

Call () Method calls the method, taking the owner object as argument. It refers to the ‘owner’ of the function or the object that belongs to.

Apply () Methodis used to write methods, which can be used on different objects and it takes arguments as an array.

28. 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. So we prefer Angular over React JS.

29. Which version you are using JS?

To find the version you are using, we have to Visit the System information tool to see what version of JavaScript is detected. JavaScript is browser dependent, which means the version of JavaScript detected may be different in Firefox than the version detected by Internet Explorer.

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

Any piece of logic that needed to be used for multiple times throughout the application should be written as a service.The logic for how and when to use these services in a view would be in the component which controls that view.

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IBM Angular Interview Questions