Alinear representation of a hierarchical file directory is known as what?
a file list
b subdirectory
c directory path
d file association

The correct answer of the given question above would be the third option, option C. A linear representation of a hierarchical file directory is known as the directory path. The directory path is expressed in a string of characters in which path components, separated by a delimiting character, represent each directory. Hope this answer helps. 

You must have a sound card

First, what does the figure look like? i can't tell you what it is if you don't have one up it will make people confused and can't answer the question, not trying to be rude just stating a fact.