Which of the following is located in user mode of a typical realtime OS, but...

Comprehensive and Detailed Explanation From Exact Extract:

In many real-time operating systems (RTOS), interprocess communication (IPC) mechanisms (A) operate in user mode to minimize latency and overhead.

In typical standard operating systems, IPC is usually handled by the kernel (kernel mode) for security and control.

Virtual memory (B), device drivers (C), and process scheduling (D) are typically kernel mode in both OS types.

GICSP covers these architectural differences important in ICS device security and performance.