9-1.txt

# Design a stock application which reports end of day stock information such
as open close high and low.

Since this is a user facing application, and I am assuming there are 1000
users, I would focus on the caching since this application is read heavy. The
data will be served by an API. Is latency important? If so, I would use C++ to
build the API for lower latency. I would also scale horizontally such as edge
nodes to serve results faster. Problems I see happening are slower responses
due to edge nodes going offline. I also foresee DDOS attacks being an issue
since this could give a competitive advantage. I would look into Cloudflare
for edge workers and DDOS protection for these problems.