FB Oculus interview

I have an upcoming onsite (virtual) interview with Oculus team and had some questions on preparation- 1. There is one "Domain knowledge" round, would anyone know what does this cover? Is it usual coding + behavioral? 2. Any recommended topics for system design? 3. For last minute coding prep, I am referring LC high frequency FB ques. Any other suggested resources? Inputs much appreciated! TC- 160k, SDE2