Discussion
Interrupt which arises from illegal or erroneous use of an instruction or data is
Answer: B
An interrupt which arises from the illegal or erroneous use of an instruction or of data is an internal interrupt, also called a trap. Examples are an overflow, a division by zero, an invalid operation code or a violation of protection. The answer is (B).
A software interrupt is caused deliberately by an instruction such as a supervisor call, and an external interrupt comes from a device outside the processor such as an I/O unit or a timer. Option (D) is wrong since only the internal type arises in this way.
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