Software Security The following question involves the following Table 5.6, which
ID: 3665625 • Letter: S
Question
Software Security
The following question involves the following Table 5.6, which contains part of a File Allocation Table. The “Cluster” column contains cluster numbers; the “Pointer” column contains the corresponding FAT entry.
The FAT entry contains one of the following: 0 to indicate a free cluster, 9999 to indicate the end of file, and any value in between indicates the next cluster in the file.
The following directory entries apply to these FAT entries:
- Name: F1, Starting Cluster: 100
- Name: F2, Starting Cluster: 106
- Name: F3, Starting Cluster: 120
- Name: F4, Starting Cluster: 126
Table 5.6: Part of a file allocation table:
1) For each file listed above, give the number of clusters in the file.
Cluster PointerClusterPointerCluster Pointer 100 10I 102 103 104 105 110 10I 102 103 104 105 106 120 121 122 123 124 121 122 123 124 112 112 113 114 115 116 113 125 107 108 109 116 126 107 108 109 127 128 129 110 118 127 128 129 118 119 119Explanation / Answer
Answer :
File F1 contains 5 clusters
F1 clusters are 100 , 101 , 102 , 103 , 104 , 129
File F2 contains 11 clusters
f2 file clusters are 106 , 107 , 108 , 109 , 110 , 111 , 112 , 116 , 117 , 118 ,129
File F3 contains 4 clusters
F3 file clusters are 120 , 121 , 122 , 123
File F4 contains 3 clusters
F4 file clusters are 126 , 127 , 128
and
File F1 contains one end of file cluster.
end of file cluster is 105
File F2 contains two free clusters and two end of file clusters.
free clusters are 114 , 115
end of file clusters are 113 , 119
File F3 contains one free cluster and one end of file cluster.
free cluster is 125
end of file cluster is 124
( or )
including free clusters and end of files the number of clusters are in each file is
F1 file contains 6 clusters.
F2 file contains 15 clusters.
F3 file contains 6 clusters.
F4 file contains 3 clusters.
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