BBB gpio inputs from 3V3 power

Hi,
I am new to BBB world, excuse me if my questions are crazy
I understand the BBB gpio inputs are designed for 3V3 supply (except few Analogue inputs with 1.8V)

What will happen if i connect to 5V by accidental, a gpio_input to 5Volts through a 1K resister, , () 5v<–//////-> gpio-input

BOOM

It's damaged, while some parts may 'work' eventually, it'll completely fry..

https://www.sparkfun.com/products/retired/10622

Regards,

BOOM

Right. The magic smoke will escape and your Beagle will die. Don't do that.
Level shifters are really cheap:

https://www.adafruit.com/?q=level%20shifter
https://www.mouser.com/Semiconductors/Logic-ICs/Translation-Voltage-Levels/_/N-4s6ih?P=1z0z63x&Keyword=level+shifter&FS=True