Question

The register that stores the bits required to mask the interrupt inputs is

(a) In-service register

(b) Priority resolver

(c) Interrupt Mask register

(d) None

I had been asked this question in an interview for job.

Origin of the question is Programmable Interrupt Controller 8259A topic in section Special Purpose Programmable Peripheral devices and their Interfacing of Microprocessor

Answer 1

Correct answer is (c) Interrupt Mask register

The best explanation: Also, Interrupt Mask Register operates on IRR(Interrupt Request Register) at the direction of the Priority Resolver.