Dr. Smith is conducting criminological research on shoplifti…
Dr. Smith is conducting criminological research on shoplifting and is applying social disorganization theory to Meridian Police Department data. Dr. Smith also wants to use the United States Census, a large source of data that he personally did not collect. This data set is considered:
Read DetailsWhat single OS operation would result in the state of the SS…
What single OS operation would result in the state of the SSD changing to the following: FTL 1: 6 2: 10 5: 2 7: 1 8: 20 9: 4 12: 16 13: 9 15: 21 17: 17 18: 5 29: 13 19: 11 20: 14 21: 15 23: 3 24: 18 25: 0 27: 8 28: 7 Block 0 1 2 Page 0000000000 1111111111 2222222222 0123456789 0123456789 0123456789 State vvvvvvvvvv vvvvvvvvvv vvEEEEEEEE Data Ih7tj3UYbK 34quFTEPXg Hg Live ++++++++++ ++ ++++++ ++
Read DetailsYou see a segment with the following set of writes block…
You see a segment with the following set of writes block 100: [(“.” 0), (“..” 0), (“foo” 1)] block 101: [size=1,ptr=100,type=d]block 102: [(“.” 1), (“..” 0)] block 103: [size=1,ptr=YYY,type=d] block 104: [imap: 0->XXX,1->103] What could be the contents of YYY in the above segment?
Read DetailsYou use a log-based SSD to hold your data. The SSD has 3 bl…
You use a log-based SSD to hold your data. The SSD has 3 blocks with 10 pages per block. Each page holds a single character. The SSD has been used for a while and the current state of the SSD is shown below. The diagram for the SSD contains the following items: FTL mapping logical pages to physical pages block numberpage number (2 lines)state of each page (valid, Erased, or invalid)data stored at each pagean indicator(+) if a page is currently live (has an entry in the FTL)Current State of SSD: FTL 1: 6 2: 10 5: 2 7: 1 8: 20 9: 4 12: 16 13: 9 15: 12 17: 17 18: 5 29: 13 19: 11 20: 14 21: 15 23: 3 24: 18 25: 0 27: 8 28: 7 Block 0 1 2 Page 0000000000 1111111111 2222222222 0123456789 0123456789 0123456789 State vvvvvvvvvv vvvvvvvvvv vEEEEEEEEE Data Ih7tj3UYbK 34quFTEPXg H Live ++++++++++ +++++++++ + Operations that the OS may perform are:write(Logical Address, Data) – storing the data at the logical address read(Logical Address) – reading the data from the logical address trim(Logical Address) – deleting the data from the logical address
Read DetailsIn a simplified file system the following operations are imp…
In a simplified file system the following operations are implemented: mkdir() – creates a directory creat() – creates an empty file open(), write(), close() – appends a block to a file link() – creates a hard link to a file unlink() – unlinks a file The on-disk file system is represented by the following: inode bitmap inode table (each inode surrounded by square brackets) data bitmap data blocks (each block surrounded by square brackets) The inode structure contains the type (d – directory, f – regular file), a pointer to a single data block (a), and a reference count (r). A directory data block contains (filename,inode number) pairs. The current state of the file system is as follows: inode bitmap 11111100inodes [d a:0 r:4][d a:1 r:2][f a:-1 r:1][f a:-1 r:2][d a:2 r:2][f a:-1 r:1][][]data bitmap 11100000data [(.,0) (..,0) (g,1) (q,2) (u,3) (x,3) (t,4)][(.,1) (..,0)(c,5)] [(.,4) (..,0)][][][][][]
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