hi on a 2007 hyundai coupe sIII does it have disc brakes on both front and back or just the front?

I can see brake calipers on rear wheels.

If disc brakes on both rear/front then is there such thing as a wheel cylinder on the rear?

Are wheel cylinders only on disc brakes.

 

Calipers are used on rotors or disc brakes
Wheel cylinders are used on drum brakes
Many times, when using discs or rotors for rear brakes, there is an emergency brake
Or parking brakes that uses the hat portion of the rotor as a drum
When that happens, there is a wheel cylinder used.
Sometimes instead of using a drum brake for the emergency brake or parking brakes
The caliper will have a lever connected to a cable going to the cabin parking brake lever
So it uses the disc brake as the parking brakes