Visa Inc. Sr. Database Engineer interview questions

The interview consists of below: 1, Technical telephonic Singapore round 1: All the basic questions were asked. 2. Technical telephonic US round 2 : Scenario and config based questions were asked. 3. Online hacketheron test. 4. Technical telephonic US round 3: Most difficult and architect level based . 5. Managerial round US based: Process related,Expectation etc. They informed,that,they can not take my candidature forward. This is the generic answer provided by HR. I don't understand,if this is the issue,then why,you have conducted so many rounds,wasting my time. They are really not serious. The interview took 4 months,damn 4 months.

Phone interview, then face to face interview. Technical discussion of my previous projects. Description of team's current challenges. Discussion of pros and cons of different approaches in design and code.