Answer:
The three types of user mode to the kernel mode transferred occurred due to the:
- It is mainly occurred due to the interrupt when, it send to the central processing unit (CPU).
- It also occurs due to the hardware exception and when the memory is access illegally as it is divided by the zero.
- It is mainly implemented or executed by the trap instruction as the system are basically executed by the program.
B- find and replace can replace any word in the document with another.
I'm pretty sure it's D. Provide discount software for the underprivileged.
