In Angular, the data fetched by the Route Resolver can be accessed in the component through the route's _____ property.
- data
- params
- queryParams
- routeData
The blank should be filled with data. The data fetched by the Route Resolver can be accessed in the component through the route's data property.
What does the ChangeDetectionStrategy.OnPush strategy signify in an Angular component?
- Automatic change detection
- Manual change detection
- No change detection
- Two-way data binding
The ChangeDetectionStrategy.OnPush signifies that change detection is manual, and Angular checks for changes only when data-bound properties change or events occur.
In Angular testing, the ______ is used to create a controlled test environment around the directive.
- ComponentFixture
- HttpClientTestingModule
- NgModule
- TestBed
In Angular testing, the TestBed is used to create a controlled test environment around the directive, allowing you to configure and set up your tests.
You are building a data table component that updates frequently. You want to minimize the performance impact of Angular's change detection mechanism on this component. How would you achieve this?
- Apply the default change detection strategy
- Increase the poll interval
- Optimize the component's HTML structure
- Use OnPush change detection strategy
To minimize the performance impact, you should use the OnPush change detection strategy, which will update the component only when its input properties change.
What is a dynamic form in Angular?
- A form that can change at runtime
- A form that changes its color
- A form that uses 3D graphics
- A form with animated transitions
In Angular, a dynamic form is a form that can change at runtime based on user interactions or application logic. It allows for flexible and customizable forms.
What does a service in Angular typically consist of?
- Component behavior
- Dependency Injection
- HTML and CSS
- Reusable application logic
In Angular, a service typically consists of reusable application logic, such as data manipulation, communication with servers, or shared functionality.
To execute the Observable and start emitting values, you need to call the _____ method.
- emit()
- execute()
- start()
- subscribe()
To execute the Observable and start emitting values, you need to call the subscribe() method. This method subscribes to the Observable and listens for emitted values.
Which RxJS operator is commonly used to filter items emitted by an Observable based on a condition?
- catchError
- filter
- switchMap
- takeUntil
The RxJS operator commonly used to filter items emitted by an Observable based on a condition is filter. It allows you to specify a predicate function to determine which items should be included in the output.
How can you access a specific form control within a form group in Angular?
- Using form.get()
- Using formArray
- Using formControl
- Using formGroup.get()
You can access a specific form control within a form group in Angular by using the **formGroup.get()** method. It allows you to retrieve a form control by its name.
In a real-time data streaming application built with Angular, you want to ensure that multiple components receive the same data from an observable without creating multiple subscriptions. What kind of observable would you use?
- AsyncSubject
- BehaviorSubject
- ReplaySubject
- Subject
To ensure multiple components receive the same data from an observable without multiple subscriptions, you would use a ReplaySubject. It replays the latest emitted value to all new subscribers.