As stated above; there isn't a specified thing that happens when the game crashes, it just happens. When the game crashes, the game freezes for about 5 seconds, then the screen turns black and a Windows notification comes up saying "DayZ has stopped working". After that I am able to click "Shut down program". Then nothing more happens.
I am able to once again start up DayZ and join a server without any issues, but I will crash once I've played for a while.