Angular · Junior · Question 49 of 75
What is an Observable (RxJS)?
- ✓Correct answer: A lazy stream that can emit many values over time and then complete or error
- 2A value that can be read synchronously at any moment
- 3A synonym for a JavaScript Promise
Explanation
A Promise resolves once and starts immediately; an Observable starts on subscription, can emit zero or many values and can be cancelled with unsubscribe().