Metron, Inc. Software Engineer interview questions

First had an 1.5 hour online interview, 30 minutes with HR and 1 hr with a technical software engineer. The engineer asked me about my resume / experiences for 30 minutes and then pulled up a CoderPad for me to solve a leetcode style question. I made it to the final round, which was a 5-hour in person series of interviews. It began with an tour / QA with the HR head, then two 1-hour long interviews with software engineers - both of which asked me a few questions and then had me do leet code questions on a whiteboard. Then I had a 1 hour interview with two directors, who also talked to me for quite a while about my experiences and also finished with a leet code problem. Then lastly I had a "demo" meeting where a software engineer asked me about a problem and how I would solve it before showing me what the company did to solve it.

There are two technical interview rounds plus a final interview that is 5 hours long. The first technical was some debugging and simple method writing in Java/Python, and the second technical was writing a few simple methods about tree traversals and binary search trees. I have not gone on to the final round yet.