When you want to disable a form control conditionally based on some logic, you would use the ______ attribute.
- [conditionalControlDisable]
- [controlToggle]
- [disable]
- [ngControlDisabled]
When you want to disable a form control conditionally based on some logic in Angular template-driven forms, you would use the [disable] attribute. This attribute allows you to bind a condition to the disabled state of a form control, making it either enabled or disabled based on the provided logic. It's a crucial feature for creating dynamic and responsive forms.
You have a multi-step form in your Angular application. At any step, if the user tries to navigate away without saving, you want to alert them. Which Route Guard will best serve this purpose?
- CanActivate
- CanActivateChild
- CanDeactivate
- Resolve
The CanDeactivate route guard is used for scenarios where you want to prompt the user with a confirmation message before navigating away from a route. It's commonly used for guarding forms to prevent users from losing unsaved data.
What is the primary role of Effects in NgRx?
- Defining Actions
- Managing Side Effects
- Reducing State
- Rendering Views
The primary role of "Effects" in NgRx is to manage side effects in your application. Side effects can include making HTTP requests, interacting with external services, and other asynchronous operations. Effects help keep your reducers pure by handling these tasks separately.
To update the value of a specific FormControl without emitting an event or re-evaluating the validation status, you would use the ______ method with specific configuration.
- patchValue
- setFormControlValue
- setValueWithConfig
- updateControlValue
To update the value of a specific FormControl without emitting an event or re-evaluating the validation status, you would use the patchValue method with specific configuration. This method allows you to update only the specified controls within a FormGroup without affecting the entire form's state or triggering any events.
Your application needs to handle API rate limits. Which tool or method in Angular would you use to delay retries on a failed HTTP request?
- Angular Error Handling
- Angular Retry Service
- RxJS RetryWhen operator
- setTimeout in a catch block
To handle API rate limits and delay retries on a failed HTTP request, you should use the RxJS retryWhen operator. This operator allows you to control retry behavior, including introducing delays between retries, making it suitable for handling rate limits and retries in Angular applications.
In an e-commerce application, you want to ensure that product details fetched from the server are not requested again for a certain period. Which technique would be effective for this scenario?
- Caching
- Lazy Loading
- Polling
- WebSockets
For this scenario, caching would be an effective technique. Caching involves storing fetched data locally for a certain period, so if the same data is requested again within that period, it can be retrieved from the cache instead of making a new request to the server, improving performance and reducing server load.
The component where the child route should get rendered must contain the ________ directive in its template.
To render a child route's content in an Angular component, you must include the acts as a placeholder where the child route's components will be displayed.
You're working on an application where rapid development and minimal setup are crucial. Which state management solution would you likely prefer given its simplicity?
- Angular Services
- MobX
- NgRx
- RxJS Observables
In a scenario where rapid development and minimal setup are crucial, MobX would likely be preferred due to its simplicity. MobX is a state management library that requires less boilerplate code compared to NgRx and provides a straightforward way to manage state in Angular applications.
How can you programmatically navigate to a different route in an Angular application?
- Use the 'navigate' method from the 'Router' service.
- Use the 'navigateTo' function from the 'RouterModule'.
- Use the 'routeTo' function in the component constructor.
- Use the 'routerLink' directive in the HTML template.
To programmatically navigate to a different route in an Angular application, you should use the 'navigate' method from the 'Router' service. This method allows you to navigate to a specified route by providing the route path or an array of route segments. It's a common approach for handling navigation within Angular components or services.
If a parent component needs to send data to a child component, which property decorator should be used?
- @ViewChild
- @Input
- @Output
- @ContentChild
To send data from a parent component to a child component in Angular, you should use the @Input property decorator. It allows the parent component to bind data to a property of the child component. The other options, such as @ViewChild, @Output, and @ContentChild, serve different purposes, like accessing child elements or emitting events.