JPMorganChase Software Engineer-III interview questions

Pretty quick with responses and scheduling. First recruiter phone call. Then hiring manager exploratory interview. Then 3 rounds: 1. Technical easy leetcode (find missing number from an array) then a writing a sql query. The interviewer was pretty old didn't know how to join the call for 40 min waiting. Then didn't understand my solution and invited someone else. They don't have their questions written into a document and ask you to share your screen to write the solution on a notepad. They just ask the questions orally which was very weird. 2. Behavioral 3. Technical - more about APIs and Java but since the question wasn't written on a doc it was very confusing and the interviewer didn't exactly know how to explain the question. Overall I learned that they use pretty old tech and that they have 10hr work days. Still about to transition into AWS it seems, or at least many of their teams aren't on AWS yet. They give no personal laptop for WFH (2days /week)