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One way to use contiguous allocation of the disk and not suffer from holes is to compact the disk every time a file is removed. Since all files are contiguous, copying a file requires a seek and rotational delay to read the file, followed by the transfer at full speed. Writing the file back requires the same work. Assuming a seek time of 5 msec, a rotational delay of 4 msec, a transfer rate of 8 MB/sec, and an average file size of 8 KB, (a) how long does it take to read a file into main memory then write it back to the disk at new location? (b) Using these numbers, how long would it take to compact half of a 16-GB disk? (c) Dose compacting the disk ever make any sense?
how to calculate crude date rate?
Buildings solutions Permanent arrangements owned or held by the state. The cost of buildings includes both acquisition costs (historical cost, ancillary costs, and, for proprieta
Quartiles and Percentiles Percentile can be explained as : a measure this tells us what is the percent of the total frequency scored at or below the measure. Quartiles
Discrete Standard Deviation For calculating standard deviation in discrete series any of the following methods may be applied (1) Actual mean method. (2) Assumed mean method. (
A boat is heading across a river at a velocity of 25 mph. The river is flowing downstream at 10 mph. What is the actual velocity of the boat?
Two components, A and B, are used as follows: normal usage - 50 per week each minimum usage - 25 per week each maximum usage - 75 per week re-order quantity - A:300; B:500 re-order
discuss the considerations to be born in mind when constracting index numbers
Consider the two events A and B with P(A) = 0.4 and P(B) = 0.3. (a) If A and B are independent then compute the probability that Both A and B happen
What would be the cutoff score to indicate a score that is in the top 15% of the scores on a test with a mean of 100 and a standard deviation of 15?
What is the properties of a simple random sample when 50 females are numbered 1 through 50, and males are numbered 51 through 100?
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