Two technical and one hr First technical: Interview person started asked questions related to speak and Databricks i have answered in detail but still rejected not sure what else they expect

Had two rounds. First round - was asked about one of my projects. SQL questions. Scenario question Second round- explain one project. Architecture questions. Unity catalog and adf related questions.

Interview Process was good and smooth, Initial process and technical rounds were streamlined and were very fast forwarded. Process was very very slow or I can say pathetic when comes to Salary discussion round and follow up for the offer letter. Even after salary negotiation offer letter wasn't released even after a month considering all the documents were provided at the same time. Selected for the role but offer letter wasn't released so lose all hope for the same (worst experience of my life). Except this overall process was good, organisation need to take care of this. No point to select a candidate if you don't want to release the offer letter.