You are working on an Angular application where a component is making multiple HTTP requests and you notice that the component is causing memory leaks. What approach can you use to solve this issue while making the code cleaner?
- Implement garbage collection strategies
- Manually unsubscribe from observables
- Use HttpClientInterceptor
- Use the async pipe
To solve memory leaks and make the code cleaner, you can use the async pipe, which automatically manages subscriptions and unsubscribes when the component is destroyed.
How does Angular Elements enable the usage of Angular components in non-Angular environments?
- By converting components to Web Components
- By embedding Angular components as iframes
- By running Angular components in iframes
- By using Angular services for integration
Angular Elements enables the usage of Angular components in non-Angular environments by converting components to Web Components, making them platform-agnostic and usable in different frameworks or plain HTML pages.
To navigate to a route conditionally based on the data fetched, you can use a Route Resolver along with the _____ Router Event.
- Activate
- Deactivate
- Navigate
- Resolve
To navigate to a route conditionally based on the data fetched, you can use a Route Resolver along with the Resolve Router Event. The Resolve event allows you to fetch data before navigating to the route.
How can you ensure that an Observable sequence retries a specific number of times after encountering an error before finally failing?
- catchError with a custom error handler
- finalize with a custom completion handler
- repeatWhen with a custom completion handler
- retryWhen with a custom error handler
To ensure that an Observable sequence retries a specific number of times after an error, you can use the retryWhen operator with a custom error handler.
The _____ decorator allows you to access route parameters within an Angular component.
- ActivatedRoute
- ParamInjector
- RouteParam
- RouterParam
The ActivatedRoute decorator allows you to access route parameters within an Angular component and retrieve data from the URL.
In template-driven forms, form controls are automatically created by Angular using the _____.
- FormControlDirective
- FormsModule
- NgModel
- TemplateDirective
In template-driven forms, form controls are automatically created using the NgModel directive.
In Angular, the _____ class is used to create form controls in reactive forms.
- FormBuilder
- FormControl
- FormGroup
- ReactiveFormsModule
In Angular, the FormControl class is used to create form controls in reactive forms.
You are building an e-commerce application and want to ensure that product details are fully loaded before navigating to the product detail page. Which feature of Angular's router would you use to achieve this?
- Angular Lifecycle Hooks
- Route Guards
- Router Interceptors
- Router Resolvers
To ensure that product details are fully loaded before navigating, you can utilize Router Resolvers. A resolver can fetch data asynchronously before activating a route, ensuring that the data is available when the route is displayed.
To enable lazy loading in Angular, you need to use the _____ property in your routing configuration.
- enableLazyLoad
- lazyLoad
- loadChildren
- routeLazy
To enable lazy loading in Angular, you need to use the loadChildren property in your routing configuration to specify the module to load lazily.
What technique can be used to ensure that an observable is automatically unsubscribed from, even if it was not manually unsubscribed?
- Angular automatically unsubscribes all observables by default.
- Employing the finalize operator to ensure automatic unsubscription.
- Implementing a custom unsubscription handler function.
- Using the unsubscribe method in a subscription.
To ensure that an observable is automatically unsubscribed, you can use the finalize operator, which allows for automatic cleanup when the observable completes, errors, or is unsubscribed. It is a good practice to prevent memory leaks.