HCLTech Teach Lead interview questions

There were two technical rounds, Java Collections, Hashmap how it works internally, Sorting code, SQL queries, Rest and soap difference, Arch diagram of Spring, diff scopes of spring bean, flow of spring mvc with login example etc in all it was very good round. third round was Team Introduction which went on for 47 minutes asking about resume projects. After completing these three rounds got a call From HCL that they hired someone internally. Not sure why did they wasted my 3 weeks for all these. Pathetic exp.