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Which interrupt is unmaskable?

a) RST 5.5
b) RST 7.5
c) TRAP
d) Both RST 5.5 and 7.5

Answer: c
Explanation: The trap is a non-maskable interrupt as it deals with the ongoing process in the processor. The trap is initiated by the process being executed due to lack of data required for its completion. Hence trap is unmaskable.

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