Angular Routing Interview Questions

This post lists some subjective questions and answers related to the Routing Mechanism of Angular. This collection contains some potential interview questions that may be helpful if you are preparing for a Frontend Engineering job interview specific to Angular framework. Check out Angular Interview Series – Topic Wise Q&A.

1. What is Angular Router?

Angular Router is a library that enables navigation between different views or components in an Angular application, managing the application’s URLs and views.

2. How do you set up routing in an Angular application?

To set up routing, we need to import RouterModule and Routes in our app module, define the routes in a Routes array, and call RouterModule.forRoot(routes) in the imports array.

3. What is a route in Angular?

A route is a definition that maps a URL path to a specific component in the application, enabling navigation to that component when the URL matches.

4. What is <router-outlet>?

The <router-outlet> is a directive that acts as a placeholder in the template where the routed component will be displayed based on the current URL.

5. How do you create a route with parameters?

We define a route with parameters using a colon in the path, like { path: 'user/:id', component: UserComponent }. The parameter can then be accessed in the component.

6. What are route guards in Angular?

Route guards are services that control access to routes, allowing or preventing navigation based on certain conditions (e.g., authentication, permissions).

7. What is lazy loading in Angular routing?

Lazy loading is a technique that loads feature modules only when they are needed, improving the initial loading time of the application. This is done using the loadChildren property in routes.

8. How do you navigate programmatically in Angular?

We can navigate programmatically using the Router service’s navigate method, e.g., this.router.navigate(['/path']).

9. What is the difference between RouterLink and Router.navigate()?

RouterLink is a directive used in templates for navigation, while Router.navigate() is a method called in TypeScript code to navigate programmatically.

10. What is route resolution?

Route resolution is a feature that allows you to fetch data before a route is activated. It uses a resolver service to pre-fetch data and inject it into the component.

These are a few questionnaires specific to Angular Routing. To know more details please refer to the Official documentation on Angular Routing.