Question: which is true of the operating system kernel for a modern system: 1. the kernel is always executibg 2. the kernel only stores resource state,

which is true of the operating system kernel for a modern system:
1. the kernel is always executibg
2. the kernel only stores resource state, it does not execute code
3. the kernel code executes in response to hardware interrupts and system calls
4. the kernel code executes when the kernel process is scheduled

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