OPERATING SYSTEMS FOR COMPUTERS
COMPUTER OPERATING SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which interrupt is the highest priority?
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Hardware:e.g. power button pressed.
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Software:e.g. a program needs to run a routine (for example, to automatically save a document being edited by a user).
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Time triggered:e.g. in data logging applications.
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Peripheral:e.g. user has moved the mouse.
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Explanation:
Detailed explanation-1: -The interrupt priority is regulated by both hardware and software. FIQ interrupts have the highest priority, followed by the vectored interrupts 0-31, and the daisy-chained interrupt has the lowest priority. The priority order of the vectored interrupts is programmable.
Detailed explanation-2: -The highest interrupt priority upon reset in 8051 is external interrupt 0.
Detailed explanation-3: -TRAP. It is a non-maskable interrupt, having the highest priority among all interrupts.
Detailed explanation-4: -NMI. It is a single non-maskable interrupt pin (NMI) having higher priority than the maskable interrupt request pin (INTR)and it is of type 2 interrupt.
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