What is the primary purpose of using NgRx for state management in an Angular application?
- Component rendering control
- Efficient memory usage
- Enhanced state management
- Improved SEO
The primary purpose of using NgRx for state management in an Angular application is to provide enhanced state management, making it easier to manage and share application state across components.
What is tree-shaking and how does the Ivy Renderer enhance it in Angular applications?
- A method for optimizing CSS in Angular apps
- A process for generating random tree structures for UI components
- A technique for eliminating unused code
- A way to improve routing in Angular apps
Tree-shaking is a technique for eliminating unused code in your application. The Ivy Renderer enhances tree-shaking in Angular applications by reducing the bundle size through better dead code elimination. This is achieved by creating a more efficient rendering pipeline, which leads to smaller, optimized bundles.
How can you define a child route in an Angular application?
- By creating a module
- By defining it in the parent component
- By specifying loadChildren in the route configuration
- By using the ngFor directive
To define a child route in an Angular application, you specify it in the route configuration of the parent component using the loadChildren property.
How can you access the data resolved by a Route Resolver within a component?
- Using a decorator
- Using a function
- Using a service
- Using an observable
You can access data resolved by a Route Resolver within a component using an observable returned by the ActivatedRoute service.
What is the purpose of a lazy-loaded module in Angular?
- To decrease initial bundle size
- To ensure a module is always loaded
- To improve application performance
- To simplify routing configuration
The purpose of a lazy-loaded module in Angular is to decrease the initial bundle size by loading the module on-demand, typically when a user navigates to a specific route. This helps improve application performance.
You want to implement a feature that prompts the user if they try to navigate away from a form without saving changes. Which Route Guard would you use to achieve this?
- CanActivate Route Guard
- CanDeactivate Route Guard
- CanLoad Route Guard
- Resolve Route Guard
To prompt the user when navigating away from a form, you should use the CanDeactivate Route Guard. It checks if the form can be deactivated without saving changes.
In Angular, the data fetched by the Route Resolver can be accessed in the component through the route's _____ property.
- data
- params
- queryParams
- routeData
The blank should be filled with data. The data fetched by the Route Resolver can be accessed in the component through the route's data property.
What does the ChangeDetectionStrategy.OnPush strategy signify in an Angular component?
- Automatic change detection
- Manual change detection
- No change detection
- Two-way data binding
The ChangeDetectionStrategy.OnPush signifies that change detection is manual, and Angular checks for changes only when data-bound properties change or events occur.
How can you navigate to a different route using Angular's router?
- Using the ng-for directive
- Using the ng-model directive
- Using the ng-switch directive
- Using the router.navigate() method
You can navigate to a different route using Angular's router by using the router.navigate() method. This method allows you to programmatically navigate to a specified route.
To display a validation error message only when a form control is touched and invalid, you can use the expressions formControlName._____ and formControlName._____.
- dirty, pristine
- touched, pristine
- valid, dirty
- valid, invalid
To display a validation error message only when a form control is touched and invalid, you can use the expressions formControlName.touched and formControlName.pristine.