Calsoft .NET Developer interview questions

One of the worst interview experience, took 3 technical rounds with the same basic set of questions and I was able to clear them all, followed by one Mettl test, after that the HR said that you have cleared all the interviewed asked me to send all the documents and than he didn't released the offer letter as he wanted written commitment from me. HR name is Parth agrawal in case the company is reading this.