2. (2 points) The most efficient type of I/O is ________. a) Direct Memory Acces

Question

2. (2 points) The most efficient type of I/O is ________.

a) Direct Memory Access (DMA)
b) Programmed I/O
c) Programmed I/O with Interrupts


3. (2 points) The least efficient type of I/O is ________.

a) Direct Memory Access (DMA)
b) Programmed I/O
c) Programmed I/O with Interrupts


4. (2 points) “Printer ready for more data” would trigger a(n) ___________.

a) External event interrupt
b) Event completion interrupt
c) Time allocation interrupt
d) Abnormal event interrupt



5. (2 points) A keyboard with input data would trigger a(n) ________.

a) External event interrupt
b) Event completion interrupt
c) Time allocation interrupt
d) Abnormal event interrupt


6. (2 points) A power loss would trigger a(n) __________.

a) External event interrupt
b) Event completion interrupt
c) Time allocation interrupt
d) Abnormal event interrupt


7. (2 points) Dividing by 0 would trigger a(n) _________.

a) External event interrupt
b) Event completion interrupt
c) Time allocation interrupt
d) Abnormal event interrupt


8. (2 points) End of a block of execution time would trigger a(n) ________.

a) External event interrupt
b) Event completion interrupt
c) Time allocation interrupt
d) Abnormal event interrupt






The following problems are True/False.

9. (2 points) _______ DMA provides for high-speed data transfer.


10. (2 points) ______ DMA allows the CPU to perform other tasks during I/O transfer.

11. (2 points) ______ DMA can transfer only in one direction.

12. (2 points) ______ DMA transfers large blocks of data to and from the CPU.

Explanation / Answer

a,b,a,b,d,t,t,t,t

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