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Ans. It is javascript framework which is written in javascript.It is best for single page application.It extends the html with new attributes which makes it more useful for ui dveloper.

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Q4. What is two way binding ?

Ans. Two-way binding means that any data-related changes affecting the model are immediately propagated to the matching view(s), and that any changes made in the view(s) (say, by the user) are immediately reflected in the underlying model. When app data changes, so does the UI, and conversely.

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Q5. what does restrict mean when we talk about directive ?

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Q6. how are filters added to expressions?

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Q7. what kind of filters did you worked with ?

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Q8. Which angular library needs to be included for Angular Routing / Views ?

Ans. @angular/router

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Q9. What are the things that need to be configured for creating route / views in angular ?

Ans. Path
View Name
Component

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Q10. Can we have multiple path maps to the same component ?

Ans. Yes

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Q11. Difference between Route and Redirect ?

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Q12. Difference between constructor and NGInit ?

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Q13. How can we give input to the component ?

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Q14. How can we make http sever calls from within angular ?

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Q15. How can we achieve 2 way binding ?

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Q16. What is a service class ?

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Q17. What is the scope of Service class ? Do we need to add it to declaration or imports or providers to be made available to the component ?

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Q18. Why angular apps are called single page applications ?

Ans. In Angular Apps, route between pages are performed without rendering the entire page. Url changes are done through routing. Routing in AngularJS is implemented by including <ng-view> or <ui-view> in the index.html page without refreshing the entire page

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Q19. What is a component, service, directive and pipe ?

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Q20. What is ng injectable ?

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Q21. What kind of deployable is created for the angular project ?

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Q22. When you build an angular application, what type of file it creates which we can deploy?

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Q23. What is the difference between Angular JS (version 1x) and Angular (version 2x) ?

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Q24. What is HMR or Hot Module Replacement in Angular ?

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Q25. What are the building blocks of Angular Apps ?

Ans. modules, components, templates, metadata, data binding, directives, services, and dependency injection

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Q26. What are the things that an angular component holds ?

Ans. Data , HTML and Logic

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Q27. What is the need of having multiple modules in angular ?

Ans. It makes the application more modular and easy to manage.

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Q28. How to add a component in Angular ?

Ans. 1. Create a component
2. Register it with a module
3. Add an element in HTML markup

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Q29. Is it required to tie a component to a module ?

Ans. Yes, We need to have a component tied to a module for it to work. If we don't want to create a new module , we can just tie it to default "app.module"

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Q30. What is the selector and template in a component ?