What is placed on a hard disk drive by a website to track certain information about its visitors?

Q: Which of the following is a software algorithm used to create a fingerprint of a file or an entire hard disk drive?

The MD5 algorithm creates a 128-bit fingerprint or message digest of the input – the input being a single file, multiple files, an entire hard drive or floppy disk, or other type of media. A good analogy is to compare a hash value with a human fingerprint.

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What keeps track of the location of files and folders on the HDD?
Where should one look for latent data?
Which of the following is a software algorithm used to create a fingerprint of a file or an entire hard disk drive?
Which of the following is not considered a hardware drive?

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What keeps track of the location of files and folders on the HDD?

What is a FAT and what is its purpose? FAT stands for file allocation table. The FAT keeps track of the location of files and folders (data) stored on the HDD.

Where should one look for latent data?

Latent data is found in the combined remaining information content on the computer from deleted files in unallocated space, swap files, print spooler files, memory dumps, the slack space of existing files and temporary cache.

Which of the following is a software algorithm used to create a fingerprint of a file or an entire hard disk drive?

The MD5 algorithm creates a 128-bit "fingerprint" or "message digest" of the input – the input being a single file, multiple files, an entire hard drive or floppy disk, or other type of media. A good analogy is to compare a hash value with a human fingerprint.