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.
What type of data binding is used when you want to send data from a component's class to its template?
- Event binding
- Interpolation binding
- One-way data binding
- Two-way data binding
In Angular, Two-way data binding is used when you want to send data from a component's class to its template, allowing data to flow in both directions between the component and the template.
When you want to bind a DOM event to a method in your component class, you use event binding.
- event binding
- interpolation binding
- property binding
- two-way binding
In Angular, event binding is used to bind a DOM event to a method in your component class, allowing you to respond to user interactions.
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.