J.P. Morgan Senior Software Engineer interview questions

The interview process starts with a call from HR. I wanted to confirm the interview timings so sent an email but didn't get a reply. At the venue, I submitted my resume and waited for my turn. Finally was called in 30 mins. The interviewer asked some basic questions like why would you want to leave the current company, core Java questions on multithreading, 2 programs and 2 SQL queries. He was very impatient and didn't give time to write code for the programming questions. He was very rude in saying I don't have an entire day to interview you. Also the number of candidates were pouring in, so they couldn't handle the crowd and hence didn't do proper justification with the candidates.

There were three rounds it seems, I couldn't get through the second. First round was written- they gave me question paper containing questions on java, HTML and CSS and javascrip, sql. It was easy though and then the second round which was F2F with 1:1, he tried to comfort me by asking few questions on previous experience and then started with core java, he went deep like Jim architecture, why primitives and uses of wrapper classes, serialisation, multi threading and etc, he asked to write pseudo code for creating a doubly linked list and etc, this went for 25-30 min and he asked me wait outside only to hear that my f2f feedback was negative