Cognizant Senior Process Executive interview questions

It's was totally five times they screened me each time it is difficult to explain each member asks different ways and finally questioned on hobbies and which was new to them and asked many things related to qualification

I had basic interview like why we need to choose you, previous work experience etc then was informed i am hired. Last minute ghosted. I felt shocked and do not understand why they can not tell directly the position is canceled until i send few follop up emails.