The _____ decorator in a component class binds a property inside the component to a value that is passed from outside the component.
- @Injectable
- @Input
- @Output
- @ViewChild
The @Input decorator in a component class binds a property inside the component to a value passed from outside the component.
In an Angular application, how would you implement a staggered animation with multiple elements?
- Use Angular CLI animations
- Use CSS animations
- Use a third-party animation library
- Use ngFor loop with a timeout
To implement a staggered animation with multiple elements, you can use ngFor loop with a timeout to apply animations to each element with a delay.
To implement lazy loading in Angular, you need to use the loadChildren property in your _______.
- Component
- Module
- Route Configuration
- Service
To implement lazy loading in Angular, you need to use the loadChildren property in your Route Configuration. This property defines which module to load lazily.
What is the advantage of using a Route Resolver over fetching data directly in the component?
- Better caching
- Improved component load time
- Reduced HTTP requests
- Simplicity and ease
The advantage of using a Route Resolver is that it improves component load time by preloading data before the component is displayed.
In a reactive form, which method is used to access a form control's value?
- access() method
- getValue() method
- retrieve() method
- value() method
In a reactive form, you can access a form control's value using the value() method provided by the FormControl class. This method returns the current value of the form control.
What could be a potential issue if two services have a circular dependency on each other in Angular?
- Compilation error
- No issue, Angular handles it automatically
- Reduced performance
- Stack overflow error
If two services have a circular dependency on each other in Angular, it can lead to a stack overflow error as they keep calling each other recursively.
When using Angular Elements, the _____ function is used to convert an Angular component into a custom element.
- createCustom()
- createCustomElement()
- createModule()
- ngModule()
When using Angular Elements, the createCustomElement() function is used to convert an Angular component into a custom element.
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.