What mode do services run in User Mode or Kernel Mode?

Question

linux

in what mode do Windows or Linux services work on User mode or Kernel mode, for example?
Thank you

Answer 1

In kernel mode, only the kernel itself and device drivers work. Everything else works in user mode.
Any program making a system call switches to kernel mode for the duration of the system call. All programs make system calls a lot and regularly.

Answer 2

services work in user mode
In Kernel mode, only the main kernel services work (the scheduler process, and most of the drivers.
There may be user drivers that work in "user space".
Here's a picture for Windows:
https://docs.microsoft. com/en-us/windows-hardware/...
In principle, it's the same in Linux, only there kernel mode is a different term, and the correct one is user space and kernel space