What are the differences between kernel space and user space?

What are the differences between kernel space and user space?

Kernel space is where the core of the operating system runs, while user space is where user applications operate.

Can you explain why these spaces are separated?

The separation enhances security and stability; it prevents user applications from directly accessing critical system resources.

What happens if a user application tries to access kernel space?

If a user application tries to access kernel space directly, it can lead to a crash or a security breach, which is why this access is restricted.

Are there any exceptions to this separation?

Yes, certain system calls allow user applications to request services from the kernel, but these are controlled and monitored.