Arduino Due I/O voltage tolerance on A0

Official Hardware Mega Due
1

I have see several examples for the Arduino Due where a POT is connected between 5v & GND.
And the POT wiper (variable resistence pin) is connected to A0 to measure the analog voltage.
Won't this damage A0? Isn't it 3.3v only?

2

Yes. Keep the pot dialed down.
Or use a fixed resistor between 5V and the top leg to limit the upper range to 3.3V.

3

Never ever do this, 5V will kill the chip. All pins are 3.3V max without exception.