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PART A We want a CPU to process input from a keyboard. Which technique should we use to process incoming data? O (a) A mix of polling and interrupts O (b) Polling O (c) Interrupts (d) DMA PART B Suppose we have a CPU running at a clock rate of 50 MHz, and a polling operation takes 10000 cycles to process a single message from an attached 1/0 device. If the device produces new data every 100 ms, what percent of CPU time do we need to poll to avoid losing any events? number (3 significant figures) PART C Suppose you're a system administrator for data center B, where on average, a computer fails once every 4 days, and then takes 5 days to repair. Rival data center S has a computer fail an average of once every 8 days, which then takes 3 days to repair. Which data center's computers have higher availability? OS OB

PART A We want a CPU to process input from a keyboard. Which technique should we use to process incoming data? O (a) A mix of polling and interrupts O (b) Polling O (c) Interrupts (d) DMA PART B Suppose we have a CPU running at a clock rate of 50 MHz, and a polling operation takes 10000 cycles to process a single message from an attached 1/0 device. If the device produces new data every 100 ms, what percent of CPU time do we need to poll to avoid losing any events? number (3 significant figures) PART C Suppose you're a system administrator for data center B, where on average, a computer fails once every 4 days, and then takes 5 days to repair. Rival data center S has a computer fail an average of once every 8 days, which then takes 3 days to repair. Which data center's computers have higher availability? OS OB

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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PART A We want a CPU to process input from a keyboard. Which technique should we use to process incoming data? O (a) A mix of polling and interrupts O (b) Polling O (c) Interrupts O (d) DMA PART B Suppose we have a CPU running at a clock rate of 50 MHz, and a polling operation takes 10000 cycles to process a single message from an attached Ivo device. If the device produces new data every 100 ms, what percent of CPU time do we need to poll to avoid losing any events? number (3 significant figures) PART C Suppose you're a system administrator for data center B, where on average, a computer fails once every 4 days, and then takes 5 days to repair. Rival data center S has a computer fail an average of once every 8 days, which then takes 3 days to repair. Which data center's computers have higher availability? OS OB
Transcribed Image Text:PART A We want a CPU to process input from a keyboard. Which technique should we use to process incoming data? O (a) A mix of polling and interrupts O (b) Polling O (c) Interrupts O (d) DMA PART B Suppose we have a CPU running at a clock rate of 50 MHz, and a polling operation takes 10000 cycles to process a single message from an attached Ivo device. If the device produces new data every 100 ms, what percent of CPU time do we need to poll to avoid losing any events? number (3 significant figures) PART C Suppose you're a system administrator for data center B, where on average, a computer fails once every 4 days, and then takes 5 days to repair. Rival data center S has a computer fail an average of once every 8 days, which then takes 3 days to repair. Which data center's computers have higher availability? OS OB
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