The kernel is the core part of the operating system as it manages the operations of the computer as well as the hardware. … It is called a hybrid kernel instead of a monolithic kernel as the emulation subsystems run on the user mode rather than the kernel mode, unlike in monolithic kernel.

Is Linux a hybrid OS?

Linux is a monolithic kernel while OS X (XNU) and Windows 7 use hybrid kernels.

Why Linux is called Portable operating system?

However, currently no such language exists that is suited for systems-level programming like creating an operating system. Linux, like most operating systems these days, is written in C, which is reason- ably portable, while allowing a close interaction with the architecture.