If you store mainly large files on a disk, should you use a smaller cluster size or larger cluster size? Why?
What will be an ideal response?
You should use a larger cluster size. If you store mostly large files on the disk, a larger cluster size usually results in better performance because fewer read/write operations need to be performed. In addition, smaller cluster sizes can lead to a fragmented disk, in which files are spread out all over the disk instead of being stored in consecutive locations. Fragmentation causes many more disk seek operations, which slows file access.
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Given the information in part (a), is a randomly chosen college student more likely to be a graduate or undergraduate student?
(a) Suppose the fraction of undergraduate students who smoke is 15% and the fraction of graduate students who smoke is 23%. If one-fifth of the college students are graduate students and the rest are undergraduates, what is the probability that a student who smokes is a graduate student?