Computers and Technology, 02.07.2021 14:00, sharkboy3780
2. Why is DMA an improvement over CPU programmed I/O?
3. When would DMA transfer be a poor choice?
4. What is the average time to read or write a 512-byte sector for a typical disk rotating at
7200 RPM? The advertised average seek time is 8ms, the transfer rate is 20MB/sec,
and the controller overhead is 2ms. Assume that the disk is idle so that there is no
waiting time.
5. Disk requests come in to the disk driver for cylinders 10, 22, 20, 2, 40, 6, and 38, in that
order. A seek takes 6 msec per cylinder moved. How much seek time is needed for
(a) First-Come, first served.
(b) Closest cylinder next.
(c) Elevator algorithm (initially moving upward).
In all cases, the arm is initially at cylinder 20.
6. Describe how keyboard software works and which problems does keyboard software
need to handle?
Answers: 2
Computers and Technology, 22.06.2019 21:00, daniella0123
Simon says is a memory game where "simon" outputs a sequence of 10 characters (r, g, b, y) and the user must repeat the sequence. create a for loop that compares the two strings starting from index 0. for each match, add one point to userscore. upon a mismatch, exit the loop using a break statement. assume simonpattern and userpattern are always the same length. ex: the following patterns yield a userscore of 4: simonpattern: rrgbryybgy userpattern: rrgbbrybgy
Answers: 2
Computers and Technology, 22.06.2019 22:20, gingerham1
Avariable of the data type arrays is storing 10 quantities. what is true about these quantities? a. the quantities all have different characteristics. b. the quantities all have the same characteristics. c. five quantities have the same and five have different characteristics. d. it is necessary for all quantities to be integers. e. it is necessary for all quantities to be characters.
Answers: 2
Computers and Technology, 23.06.2019 02:30, hailey5campbelp7d1c0
What is the power dissipated by a resistor with a current of 0.02 a and a resistance of 1,000 ? a. 200 w b. 20 w c. 0.4 w d. 4 w
Answers: 1
2. Why is DMA an improvement over CPU programmed I/O?
3. When would DMA transfer be a poor choice?<...
Biology, 05.05.2020 14:36
History, 05.05.2020 14:36
Mathematics, 05.05.2020 14:36
Mathematics, 05.05.2020 14:36
Mathematics, 05.05.2020 14:36