If you honestly think that you can plagiarize someone else's work and not get caught, you are an idiot. Twenty years ago, you could do it and stand a chance. Today? I've got a nifty little tool called "Google", which excels at finding matching documents from text fragments. So that code you just copied from a tutorial and didn't bother to change at all? Yeah, that was the first hit on my search.
I applaud your audacity and resourcefulness. Laziness is a job requirement for our profession. You should always try to avoid reinventing the wheel. Your job application is still going to the bottom of my trashcan, because the point wasn't to get something I could actually use, it was to show that you could build it on your own.