Question:
Which of the following methods is used for CPU to perform I/O operation?
Which of the following methods is used for CPU to perform I/O operation?
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DMA transfers data directly between memory and device without CPU.
Updated On: Jul 2, 2026
- program initiated I/O
- device initiated I/O
- direct memory access
- serial I/O
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
I/O operations can be handled in different ways depending on efficiency and CPU involvement.
Step 1: Programmed I/O CPU actively waits and transfers data.
Step 2: Interrupt driven I/O CPU responds to interrupt signals.
Step 3: Direct Memory Access (DMA) DMA allows devices to transfer data directly to memory without CPU intervention.
Step 4: Advantage of DMA Reduces CPU workload and increases speed.
Step 5: Conclusion \[ \boxed{\text{Direct Memory Access}} \]
Final Answer: \[ \boxed{(C)} \]
Step 1: Programmed I/O CPU actively waits and transfers data.
Step 2: Interrupt driven I/O CPU responds to interrupt signals.
Step 3: Direct Memory Access (DMA) DMA allows devices to transfer data directly to memory without CPU intervention.
Step 4: Advantage of DMA Reduces CPU workload and increases speed.
Step 5: Conclusion \[ \boxed{\text{Direct Memory Access}} \]
Final Answer: \[ \boxed{(C)} \]
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