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    Question

    A file extension is 

    A label designated to a file used to distinguish what program opens that file. Correct Answer Incorrect Answer
    B often three characters long, for example, the file myfile.txt has an extension of .txt, which is a text file. Correct Answer Incorrect Answer
    C determined by viewing the file's icon or by reading the file extension. Correct Answer Incorrect Answer
    D metadata about a file; a string used to uniquely identify a file stored on the file system. Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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