If you are asked a question, and you
obfuscate the answer...what are you doing?
Obfuscate means to muddle or confuse. Often associated with politics, many sources state the definition as being an
intentional attempt to make a concept or issue harder to understand.
So, if you don't know the answer in the first place and are randomly verbalizing in hopes that you will hit the nail on the head, that would most likely not be considered obfuscation.
However, if you are taking an oral exam you have not prepared for, you might be making a deliberate attempt at obfuscating the issue, in hopes that you sound like you know the answer even if you don't.
The cyber-coding world has also borrowed the term by creating "obfuscation code" for security purposes.