COMPUTER SOFTWARE
OPERATING SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the first thing that needs to happen when an interrupt is detected?
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Change the process state of the currently executing process to blocked
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Load the interrupt service routine
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Pop registers off the memory stack
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Push the current contents of CPU registers onto the memory stack
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Explanation:
Detailed explanation-1: -Whenever an interrupt occurs, it causes the CPU to stop executing the current program. Then comes the control to interrupt the handler or interrupt service routine.
Detailed explanation-2: -CPU saves the state of the executing program. CPU passes control of computer to interrupt handler. When interrupt handler is finished, CPU transfers control back to originally executing program.
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