NVIDIA Solution Architect interview questions

First round is just asking things on the resume. Nothing special. Second round is about system design and domain knowledge. I was asked how to improve my RAG system in my previous intern. The interviewer is more interested in inference speedup and he wanted to know if I have any experience on Nvidia Nsight tool. Nsight System and Nsight Compute is enough. No need to talk about Nsight Graphic.

How would efficiently sum a large array?