Which file naming convention avoids spaces and uses capitalization to differentiate words?

Using capitalization to differentiate words in a file naming convention is characteristic of CamelCase. In CamelCase, the first letter of each word is capitalized, and there are no spaces or underscores between the words. For example, a file might be named "fileNameExample" where "file," "Name," and "Example" are clearly differentiated through the use of uppercase letters at the beginning of each word.

PascalCase shares similarities with CamelCase but typically refers to a specific case where the first letter of the overall variable name is also capitalized. However, since both follow the same principle of not using spaces, CamelCase is more commonly associated with the practice described in the question.

Snake_case, on the other hand, utilizes underscores to separate words rather than capitalization; this is not in line with the naming convention mentioned. Underscore Case similarly relies on underscores and does not capitalize its elements in the same way.

Therefore, the defining characteristics of CamelCase—specifically the avoidance of spaces and the use of capitalization—make it the correct answer in this context.