I am confused about what this line of code would do. I understand all the pieces but not the final outcome. Anyone that could help?

find / -type f -xdev -mtime 0 -size 100000 -exec ls -lht {} /; 2>/dev/null

Well, first of all, the command would fail, you have to replace the /; with \; for it to run.
What the command would do is, find in the / filesystem, all entities (shall I say) that are plain files (-type f), not descending into directories that contain other mounted filesystems (-xdev), that were modified today - 0 days ago (-mtime 0), that are of size 100000 512 byte blocks (-size 100000), and execute the command 'ls -lht' on each file that has been found (-exec).

Cheers.

Thanks I could break down the parts but it was bothering me that I could not figure out what it was doing.

and don't forget redirect any errors to /dev/null. Although not too sure what errors you might get in the first place

Thanks for the response. The redirect would take care of any error messages generated if one was not logged on as root.