How to make sure all functions work properly after buying a used/refurbished DSLR?

Hi, I will be receiving a used DSLR camera, (Nikon D5100), since I'm a beginner, I don't know anything. How can I know everything works exactly like new and that the images and all the functions are perfectly right?

Actually I would have recommended that you make sure of that before you buy. That means being able to handle, shoot with and closely examine the shots it takes on a computer before any money changes hands.

But, since you didn't do that, and if it comes with an owner's manual sit down and read it with the camera in your lap. If you don't have a manual you can download one in pdf format from the Nikon site.

As you're reading check each function as it's presented in the book. By the time you're done you'll have the answer to your question.

Best of luck