Anonymous Content interview questions

My interview was scheduled in Stanra tech start Up , It was scheduled through a third party . It was telephonic , first round went well , answered all the questions correctly , I was asked about OOP concepts and about Micro services , it went well and got selected in first round . In second rounf Spring boot questions were asked very basic , OOPs concepts again , again micro services and about jpa , I could not answer two questions related to JPA , got rejected .