What is an interrupt?

Answer Posted / vinay m k

An interrupt is a signal receieved by the processor from
hardware co-processor through one of its external address
busses/pins, or it could be a message posted by one of the
[software] processes runing in it.

Interrupt is inherently asynchronous in nature and is used
to grab the attention of the processor in a non-planned
fashion - allowing variable execution periods.
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