You have an Angular form where users can input an email address. You want to check in real-time whether the email address is already registered in your system. Which type of validation would be suitable for this?
- Async Validators that perform server-side checks.
- Built-in Validators like required and email.
- Custom Synchronous Validators with JavaScript functions.
- Pattern Validators with regular expressions.
To check in real-time whether an email address is already registered, you should use Async Validators that perform server-side checks, allowing you to query the server for existing email addresses.
To test directives with dependencies, Angular provides the _______ class which allows you to inject dependencies and spy on their usage.
- ComponentFixture
- TestBed
- TestBedDependency
- TestBedStub
To test directives with dependencies, Angular provides the TestBed class, which allows you to configure testing modules and inject dependencies.
In NgRx, the _____ property of an action usually contains additional information or context.
- Action
- Meta
- Payload
- Type
In NgRx, the Meta property of an action usually contains additional information or context that can be helpful when processing the action.
In template-driven forms, form controls are automatically created by Angular using the _____.
- FormControlDirective
- FormsModule
- NgModel
- TemplateDirective
In template-driven forms, form controls are automatically created using the NgModel directive.
In Angular, to manually control the emission of values in an Observable, you can use a _____.
- BehaviorSubject
- Pipe
- Subject
- combineLatest
In Angular, to manually control the emission of values in an Observable, you can use a Subject.
To test a component as a whole, including its interaction with child components, you should use _____ testing.
- e2e
- integration
- mock
- unit
To test a component as a whole, including its interaction with child components, you should use integration testing. This allows testing the component's behavior in a broader context.
When components need to be loaded dynamically at runtime, you make use of Angular's _____.
- ComponentFactoryResolver
- DI (Dependency Injection)
- NgModule
- Route Guards
When components need to be loaded dynamically at runtime, you make use of Angular's ComponentFactoryResolver. This allows dynamic component creation in Angular applications.
When defining routes, the _____ property specifies which component should be displayed when a particular path is navigated to.
- component
- componentSelector
- componentToShow
- viewComponent
When defining routes, the component property specifies which component should be displayed when a particular path is navigated to.
What is the main advantage of using Angular Universal for server-side rendering?
- Enhanced development experience
- Improved SEO and faster initial page loads
- Native mobile app support
- Simplified component creation
The main advantage of using Angular Universal for server-side rendering is improved SEO and faster initial page loads. It allows search engines to index your content better and speeds up the first page load.
What is the primary purpose of two-way data binding in Angular?
- Handle user input
- Send data from template to class
- Synchronize data between class & template
- Trigger events automatically
The primary purpose of two-way data binding in Angular is to synchronize data between the component's class and its template, allowing changes in one to reflect in the other, making it useful for forms and interactive UI elements.