Question:
The occurrence of an event is usually signaled by an interrupt from software by executing a special instruction which is called:
The occurrence of an event is usually signaled by an interrupt from software by executing a special instruction which is called:
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Interrupt = Signal, ISR (Interrupt Service Routine) = Handler.
Updated On: Jun 5, 2026
- Bootstrap Program
- Service Routine
- Interrupt
- Interrupt Vector
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The Correct Option is C
Solution and Explanation
Concept:
In computer systems, an interrupt is a signal sent to the processor indicating that an event needs immediate attention.
Step 1: Understand interrupt mechanism.
• Hardware or software generates interrupt
• CPU pauses current execution
• Executes interrupt handling routine
Step 2: Software interrupt. Software uses a special instruction (like INT instruction) to generate interrupt.
Step 3: Evaluate options.
• Bootstrap Program → Used during system startup
• Service Routine → Handles interrupt, not generates it
• Interrupt → Correct term for signal
• Interrupt Vector → Address table
Step 4: Conclusion. \[ \boxed{(3)\ \text{Interrupt}} \]
Step 1: Understand interrupt mechanism.
• Hardware or software generates interrupt
• CPU pauses current execution
• Executes interrupt handling routine
Step 2: Software interrupt. Software uses a special instruction (like INT instruction) to generate interrupt.
Step 3: Evaluate options.
• Bootstrap Program → Used during system startup
• Service Routine → Handles interrupt, not generates it
• Interrupt → Correct term for signal
• Interrupt Vector → Address table
Step 4: Conclusion. \[ \boxed{(3)\ \text{Interrupt}} \]
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