Engineering, 22.02.2020 00:54 mfg1235
You need to sort a file of n GB file stored on a hard-drive. Your RAM contains only 5GB. You have a lightning-fast CPU, but writing or reading from the disk (a single I/O operation) is slow. So we estimate the number of I/O, and ignore CPU time. For simplicity, assume your disk is partition into blocks, each of size 1GB. In each I/O operation, you could read or write one block. The input file occupies the blocks b_1 ellipsis b_n. Explain how to sort the file, using O(nlogn) I/O operations. You could assume that your hard-drive contains n blocks of free space f_1, f_2, ellipsis, f_n Ignore caching issues.
Answers: 3
Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
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Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:10
The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m
Answers: 2
Engineering, 04.07.2019 19:10
How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?
Answers: 2
You need to sort a file of n GB file stored on a hard-drive. Your RAM contains only 5GB. You have a...
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