Jefferies Houston - Advice for O&G technicals

Currently a freshman looking to break into the Houston scene and started delving into O&G-specific technicals. I am familiar with the BIWS guide floating around and used this site to gain a sense of the most common Qs (NAV, different accounting treatments, the energy verticals, etc.). However, I have read that Jeff is particularly technical as their SA interviews tend to have the most hardcore O&G questions including computation questions on energy metrics and in-depth accounting. Can anyone who went through the process give a few examples of these? Don't go to the greatest school so don't want to get dinged on lack of knowledge when I apply