CS 61C (Fall 2007)

Quiz 35

Three questions, submit as "quiz35".  Due 2:45pm before lecture 11/26/2007.


Consider the three styles of I/O:
  1. Polling
  2. DMA
  3. Interrupt Driven

1.

Which provides the lowest latency? Please explain very briefly.

2.

Which requires the fewest CPU cycles, and thus has the lowest impact on processor utilazation? Please explain very briefly.

3.

Which provides the highest bandwidth? Please explain very briefly.