Question

\finalessay\, \birthday2014\, and \attachment_3\ are all examples of file extensions. true false

Explanation:

File extensions are the suffixes at the end of a file name, usually preceded by a dot (e.g.,.docx,.jpg). The given examples ("FinalEssay", "Birthday2014", "Attachment_3") do not have a dot - separated suffix that represents a standard file type, so they are not file extensions.

Answer:

B. False