Subject
Computer Science
Topic
Computer Hardware
What is a 'system interrupt' (or IRQ)?
What is a 'system interrupt' (or IRQ)?
a)
A signal from a hardware device or software indicating an event that needs immediate attention from the CPU.b)
A command that forces the computer to shut down.c)
A temporary pause in the system clock.d)
A security feature that prevents unauthorized memory access.Explanation
Interrupts are a fundamental mechanism for I/O. Instead of the CPU constantly polling devices to see if they need service, a device can send an interrupt signal. The CPU then pauses its current task, services the interrupt, and resumes its original task, which is far more efficient.Related questions
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