Angular is a robust front-end JavaScript framework that is widely used for app development. With the increased popularity, there is a high demand for Angular developers. This article on Angular Interview Questions will present some commonly asked questions and how to answer them. The questions are bifurcated into two levels, beginner and advanced.Â
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3 Can we return View from ASP.NET Web API method?
No, we cannot return the view from the ASP.NET Web API method. ASP.NET web API develops HTTP services that provide raw data or information. ApiController in ASP.NET MVC application only renders data that is serialized and sent to the client. One can use a controller to provide normal views.
2 What is ASP.NET Web API routing?
Routing is the most important part of ASP.NET Web API. Routing is a way how Web API matches a URI to an action. It is basically a process that decides which action and controller should be called. The controller is basically a class that handles all HTTP requests. All public methods of controllers are basically known as action methods or just actions. Whenever a Web API framework receives any type of request, it routes that request to action.
There are basically two ways to implement routing in Web API as given below:Convention-based routing: Web API supports convention-based routing. In this type of routing, Web API uses route templates to select which controller and action method to execute. Attribute-based routing: Web API 2 generally supports a new type of routing known as attribute routing. As the name suggests, it uses attributes to define routes. It is the ability to add routes to the route table via attributes.
51) Can we create nested controllers in AngularJS?
Yes, we can create a nested controller in AngularJS.
Example of nested controller is as follows:
The authentication is a service that is used to login and logout of Angular application. The credentials of users pass to API on the server. Then post server-side validation these credentials, JSON Web Token is returned, which as detail about the current user.
AngularJS Material is an implementation of the Material Design Specification of Google. It offers a set of well-tested, reusable UI components for AngularJS programmer.
1 Explain Components, Modules and Services in Angular
Modules, components and services are classes that use decorators. These decorators mark their type and provide metadata that tells Angular how to use them. The metadata for a component class associates it with a template that defines a view.
Components: We have one or more components at the heart of every Angular App. In fact, in the real world, we create complicated apps that contain tens of components. The data, HTML markup, and logic for a view behind the view are all encapsulated in a Component. Component-based design is embraced by Angular, allowing us to work on smaller, more maintainable portions that may also be reused in different places. Every application must have at least one component, referred to as the appcomponent or root component. Starting with the appcomponent, a real-world Angular app is effectively a tree of components. Modules: A module is a container that holds a collection of connected components. Every angular app contains at least one module, which we refer to as the app module. We may want to divide our modules into smaller, more maintainable modules as our application expands. As the programme expands, we will need to subdivide our app module into smaller modules, each of which will be responsible for a different section. It has components that are connected. Service: Angular services are singleton objects that are instantiated only once during an application’s lifetime. They include methods for preserving data during the life of an application, i.e., data is not refreshed and is always available.