Question: q.4.1. Define: 1. Device Driver 2. Device Controller q.4.2. Explain how an I/O operation works. Use pictures to exp lain your answer. q.4.3. Why and

q.4.1. Define:

1. Device Driver

2. Device Controller

q.4.2. Explain how an I/O operation works. Use pictures to explain your answer.

q.4.3. Why and how DMA (Direct access memory) is used?

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