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 has the least 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: -INTR. It is a maskable interrupt, having the lowest priority among all interrupts. It can be disabled by resetting the microprocessor. The microprocessor checks the status of INTR signal during the execution of each instruction.
Detailed explanation-2: -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-3: -The highest interrupt priority upon reset in 8051 is external interrupt 0.
There is 1 question to complete.