A number assigned to expansion adapters or ports so that the CPU can prioritize between two (or more) devices that need attention is a(n)
A) IRQ
B) I/O address
C) DMA channel
D) USB enabler

Question

Quizplus · Accepted Answer

IRQ stands for interrupt request and is a unique identifier assigned to each device or port. When a device needs the CPU's attention, it sends an interrupt request to the processor through its assigned IRQ, allowing the CPU to prioritize which device to handle first.

A Number Assigned to Expansion Adapters or Ports So That