a. There are three techniques in data transfer between memory and I/O devices. Explain TWO (2) advantages of the Direct Memory Access (DMA). Terdapat tiga teknik didalam penghantaran data antara memori dan peranti 1/0. Terangkan. DUA (2) kelebihan Direct Memory Access (DMA). (5 marks) b. Explain the disadvantages of interrupt driven 1/0 during the data transfer between memory and I/O devices. Terangkan kelemahan interrupt driven 1/0 semasa penghantaran data diantara memori dan peranti I/O