200 Chapter7·DataStructuresandtheAnatomyofaFile Frequently Asked Questions Q: Does the Windows file creation date indicate the first time the file was created? A: No, the Windows file creation date indicates when a file was saved in a particular location. Frequently, a file's last modification date is earlier than its file creation date. This indicates that the file was created in another location and was then moved into its current location. Q: Can you hide the contents of a file by changing its file header? A: No. Changing a file header could corrupt a file's data. It could also cause a program to attempt to open a file when it may not have the ability to. This would result in an error message. Q: Within Windows, is a file's modification date the most commonly changed date/timestamp? A: Within Windows, Last Accessed Date/Time is the most frequently changed timestamp. A file's modification date is changed when a file is opened, edited, and saved. If you simply open a file and don't change anything without saving the file, only Last Accessed Date/Time would be updated. Q: How many characters are in an MD5 128-bit hash?