Truck drivers probably can't see your vehicle if

Truck drivers probably can't see your vehicle if you cannot see them in their side mirror

In driving terminology there is a term called the bind spot. Blind spot is the area where the driver is not able to see the vehicle behind him and this area is present just behind the truck and very close to the gates of the car. Since trucks do not have the rare mirror therefore if a car is present in their blind spot they wont be able to see it. The driver behind the truck can spot it if he does not see the truck driver in the side mirror of the truck.

answer; insolated i/o uses separate memory space,and on the other hand memory mapped i/o uses memory from the main

answer; i believe its compare (b3: b4) ;