Which language is used to make a driver?

Question

Which language is used to make a driver?
Did wifi hotspot is a driver

Answer 1

Device drivers are usually written in C, using the driver development kit. There functional and object-oriented ways to program drivers.

Most I/O devices drivers for linux/unix systems are written in C.

For some operating systems, C++ maybe used..

Answer 2

C for Linux
C++ for windows