What is the difference between FIQ and IRQ interrupt system?

Question

I want to know the difference between FIQ and IRQ interrupt system in any microprocessor, e.g: ARM926EJ.

Answer 1

No any magic about FIQ. FIQ just can interrupt any other IRQ which is being served,this is why it is called 'fast'. The system reacts faster on these interrupts but the rest is the same.