What is the function of the CPU following the commencement of a DMA transfer?

Correct option is B

Following the commencement of a DMA (Direct Memory Access) transfer, the CPU is free to perform other tasks while the DMA controller handles the actual data transfer between memory and peripherals. The CPU does not actively manage each byte during the transfer, allowing it to be more efficient by performing other computations or tasks.
Important Key Points:
1. DMA Control: The DMA controller takes over the responsibility of transferring data between memory and peripherals, freeing up the CPU.
2. CPU Efficiency: The CPU can continue executing other instructions while the DMA controller manages the data transfer, improving system performance.
3. Resource Optimization: By offloading the transfer process to the DMA controller, the system optimizes the use of CPU resources, especially in high-speed data transfer scenarios.
Knowledge Booster:
· It actively manages each byte transferred: During a DMA transfer, the CPU does not manage each byte; instead, it delegates that responsibility to the DMA controller.
· It handles the entire data transfer: The DMA controller manages the data transfer, not the CPU.
· It must remain idle until the DMA transfer is complete: The CPU does not need to remain idle; it can perform other tasks while the DMA controller handles the data transfer.