Angular Interview Test 2025 – 400 Free Practice Questions to Pass the Exam

The catchError operator in RxJS is specifically designed to handle errors that occur within observable streams. When an error is encountered in an observable, the catchError operator allows developers to intercept the error and provide a fallback value or perform a different action, ensuring the observable does not terminate unexpectedly.

By using catchError, developers can manage error handling gracefully, allowing the application to continue working even if an error occurs, rather than being disrupted. This operator can also be employed to log errors or trigger different logic in response to the error condition, which is essential for creating robust applications that can cope with unexpected scenarios in a reactive programming context.

In terms of the other options, enhancing performance, manipulating data streams, or changing the type of observables do not accurately reflect the primary utility of catchError, as its core functionality revolves specifically around error handling.