Observable vs Subject and asObservable

Question

I am learning RxJs, I am seeking confirmation or correction on my assumption.

I am trying to make a public read only observable in a servic

Answer 1

In project we are using this kind of Observables, this is giving you proper encapsulation to your private observable, but you still can call next() using some public method.

      private sourceName = new Subject();
      name = this.sourceProductName.asObservable();

      sendName(item: T) {
        this.sourceName.next(item);
      }