NTA UGC NET DEC-2022 Paper-2
November 12, 2023Question 16554 – TIFR PHD 2022
November 12, 2023GATE 2022
| Question 17 |
Which one of the following facilitates transfer of bulk data from hard disk to main memory with the highest throughput?
| DMA based I/O transfer | |
| Interrupt driven I/O transfer | |
| Polling based I/O transfer | |
| Programmed I/O transfer |
Question 17 Explanation:
Explanation: Both the methods of programmed I/O and Interrupt-driven I/O require the active intervention of the processor to transfer data between memory and the I/O module, and any data transfer must transverse a path through the processor.
DMA or direct memory access allows the peripherals to directly communicate with each other using the memory buses, removing the intervention of the CPU. Hence it is the fast mode of IO transfer compared to all other methods. In polling, the processor wastes countless processor cycles by repeatedly checking each IO device if it needs attention.
DMA or direct memory access allows the peripherals to directly communicate with each other using the memory buses, removing the intervention of the CPU. Hence it is the fast mode of IO transfer compared to all other methods. In polling, the processor wastes countless processor cycles by repeatedly checking each IO device if it needs attention.
Correct Answer: A
Question 17 Explanation:
Explanation: Both the methods of programmed I/O and Interrupt-driven I/O require the active intervention of the processor to transfer data between memory and the I/O module, and any data transfer must transverse a path through the processor.
DMA or direct memory access allows the peripherals to directly communicate with each other using the memory buses, removing the intervention of the CPU. Hence it is the fast mode of IO transfer compared to all other methods. In polling, the processor wastes countless processor cycles by repeatedly checking each IO device if it needs attention.
DMA or direct memory access allows the peripherals to directly communicate with each other using the memory buses, removing the intervention of the CPU. Hence it is the fast mode of IO transfer compared to all other methods. In polling, the processor wastes countless processor cycles by repeatedly checking each IO device if it needs attention.