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Home » Quiz » Angular Quiz

To execute the Observable and start emitting values, you need to call the _____ method.

Difficulty level
  • 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.
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Angular Quiz
Quiz
In RxJS, to ensure that resources like subscriptions are released when an Observable completes or errors out, you can use the _____ operator.
To display a validation error message only when a form control is touched and invalid, you can use the expressions formControlName._____ and formControlName._____.

Related Quiz

  • You have an Observable stream of user actions in your application. You want to perform a side effect, such as logging, each time an action occurs without modifying the original stream. Which RxJS operator should you use?
  • Reactive forms in Angular are also known as _____ forms.
  • Why is it necessary to test Angular pipes?
  • For better debugging of Protractor tests, you can take advantage of _____ to take a screenshot of the browser's state when a test fails.
  • How can you share a single Observable execution between multiple subscribers?

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