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COMPUTER ORGANIZATION & ARCHITECTUREWhich of the following I/O transfer methods involves the CPU polling the device until data is read? i) DMA ii) Interrupt-driven I/O iii) Program-controlled I/O iv) Asynchronous I/O20242mCOMPUTER ORGANIZATION & ARCHITECTUREExplain I/O transfer techniques: program-controlled I/O, interrupt-driven I/O, and DMA.20257mCOMPUTER ORGANIZATION & ARCHITECTUREDescribe different types of Input/Output transfers. Explain how data transfer takes place through DMA.202414mCOMPUTER ORGANIZATION & ARCHITECTUREThe intradata transfer techniques are implemented using - (i) serial I/O - (ii) parallel 1/0 - (iii) Both (i) and (ii) - (iv) Neither (i) nor (ii)20192m