Reserve Bank Information Technology Front end Developer Interview Questions and Answers

Q1. What is observable and promises
Ans. 
Observables and promises are both used for handling asynchronous operations in JavaScript.
• Observables are used for handling multiple values over time, while promises are used for handling a single value at a time.

• Observables can be cancelled, while promises cannot be cancelled.

• Promises have a built-in mechanism for error handling using the catch method, while observables use the error callback function.

• Observables are ...read more
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