Why might you want to use async/await syntax in your Protractor tests?
- To improve test performance
- To make tests slower
- To reduce code complexity
- To synchronize operations
Using async/await syntax in Protractor tests helps synchronize operations and handle asynchronous tasks, ensuring more reliable and stable tests.
You are building a registration form and want to ensure that the password and confirm password fields match. Which approach would you use to validate this?
- Use a simple JavaScript function to compare the fields.
- Use the Reactive Forms approach with custom validators.
- Use the Template-Driven Forms approach with ngModel binding.
- Use the Validator Functions provided by Angular.
To ensure that the password and confirm password fields match in an Angular registration form, you should use the Reactive Forms approach with custom validators. This allows for more complex validation logic and better user feedback.
How can you identify and select a specific element on a webpage in a Protractor test?
- browser.selectElement()
- element(by.css())
- element(by.model())
- findElement(By.id())
To identify and select an element on a webpage in Protractor, you can use the element(by.css()) method, specifying a CSS selector.
How can you prevent memory leaks related to observables when using the async pipe in Angular?
- Angular automatically handles memory leaks with the async pipe.
- Manually unsubscribing from the observable when it's no longer needed.
- There's no way to prevent memory leaks when using the async pipe.
- Using the ngOnDestroy lifecycle hook to unsubscribe from observables.
To prevent memory leaks when using the async pipe in Angular, you should use the ngOnDestroy lifecycle hook to unsubscribe from observables. Failing to unsubscribe from observables can lead to memory leaks, so it's essential to clean up resources properly.
To check if a form control's value has been changed by the user, you can check the _____ property.
- dirty
- pristine
- touched
- value
To check if a form control's value has been changed by the user, you can check the dirty property. The "dirty" state means the control has been touched or modified.
In Angular, you can group together multiple form controls into a single logical unit using _____ .
- ControlUnit
- FormControlGroup
- FormDirective
- FormGroup
In Angular, you can group together multiple form controls into a single logical unit using a FormGroup.
If you need to multicast a single source Observable to multiple observers, you would use a _____.
- forkJoin
- multicast
- subscribe
- toPromise
If you need to multicast a single source Observable to multiple observers, you would use a multicast.
The queryParamsHandling property of the _______ object allows you to specify how Angular should merge query parameters with the current query parameters.
- ActivatedRoute
- ActivatedRouteSnapshot
- Router
- RouterStateSnapshot
The queryParamsHandling property of the Router object allows you to specify how Angular should merge query parameters with the current query parameters.
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.