Capital One Software Engineer I interview questions

Did a HackerRank coding challenge followed by an onsite interview. The on site was a "technical" interview followed by a fit/behavioural interview. The "technical" is in quotes because they just had a senior software engineer ask me to go through my HackerRank challenge code followed by ask me a question on every single bullet point on my resume. For example, on my resume I mentioned that I'd worked with SQL 2 years prior, and she asked me to write a relatively detailed SQL query. Then she asked me to reverse a string. Literally one line into the code she interrupted me and asked me another question regarding the difference between a StringBuilder and a StringBuffer. At the time of the interview, I did not know the difference, so I told her I've only ever worked with StringBuilders. After the interview, I googled it and it turns out they do the exact same thing, except one is thread safe. I asked if she wanted me to continue with the string reversal code and she said no, to just leave it. Then she went on to ask me what series of Git commands I would use to accomplish a task. I don't remember exactly what the task was, but when I said I'd use rebase command, she was extremely confused as to what it was. I had to explain to her the difference between the rebase and merge commands. All in all this was a very unorganized interview.