Arm interview questions

I was interviewed for senior software engineer at arm. Interview was good, questions were not tough, you will be able to solve questions. And Interviewee will act as if you are giving all the right answers. Then the wait starts, I followed up more than twice and finally after a month I saw the status as Interviewed(not selected) status in the career portal and thats how I came to know I didnt clear the interview. And after I asked for the reason they said I was not technically good.