If you have an old concrete floor, it will surely be chipped or cracked somewhere. Your concrete floor likely even has some big old holes in it somewhere. This is hard to avoid. Heavy object as well as weather exposure can crack, chip or break a hole into concrete surfaces easier than most people think. If you have a hole you will want to fix it soon before it gets worse and, believe me, damage to hard, exposed surfaces do get worse.
I wrote an article on how to fix a hole / pothole. Check it out . I have linked it below.

Learning to do your own home repair or home improvement projects isn't difficult; it is mostly a willingness to learn and digging in to do them. Don't let your fear of failure or lack of knowledge make you hire expensive repairmen for simple tasks that are easily learned.

For many homeowners, remodelers, and Diy’ers, selecting the best masonry drill and bit combination, is a bit of a challenge. With all the different types of drills and drill bits available to drill holes into concrete blocks, walls, floors, steps, and porches. How are we to know, what masonry drill is the best choice for our home repair projects. As you continue reading this article, discover how using a hammer drill that both spins the drill bit, and provides a hammering action makes a hammer drill the best way to drill holes for any masonry home remodeling project.