Question: 3 The DMA method does not require CPU intervention in the data transfer process, but after the data transfer, it still needs to send interrupt

send interrupt to CPU for handling data verification. (2.09) 5 In paging

3 The "DMA" method does not require CPU intervention in the data transfer process, but after the data transfer, it still needs to send interrupt to CPU for handling data verification. (2.09) 5 In paging system, the size of a page can vary depending on the requirements of each process. (2.0) 4 In the "P" primitive, after the operation "semaphore minus 1" . If the value of semaphore is greater than 0, it returns directly. If the value less than or equal to 0, the calling process enters the waiting queue. (2.08)

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