I live in central Florida and my house is only 3 years old, however my hose bib continually leaks no matter how hard I turn the valve off. I'm pretty handy at repairing things, but my question is how do I know if the hose bib is threaded or glued on? I know all the plumbing was done in pvc because I took pictures during construction, but because it's a block house I'm not sure what's behind the wall.

If your pipes are white or yellowish white that's PVC or CPVC and they are glued. Here ius an old post that Tom answered but I am afraid you will need to give more info before we can tell what you have for sure. https://www.askmehelpdesk.com/plumbing/outdoor-spigot-dripping-handle-31781.html