Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
In this project I learned how to create a Tree LinkList with unlimited children (not binary), and was able to build function that would find the height, and print the level order of the Tree. Also used ArrayDeque to solve a simple problem that checks if a Parathesis has a closing one or not.