Be as vague as humanly possible
When asked ANY kind of question by a US govman, make an effort to be as vague and uninformative as possible. That's not because of some tinfoil-hatted theory but because they are almost all poor sods who failed the interview to enter Wallmart security. They just follow the script, and they have keywords that they have to followup on. To avoid inadvertently muttering one of these, always be as vague as possible, avoid multisyllabic words, basically avoid saying anything that you would not find in a "my first book of words" book (and make sure to avoid the more complicated ones in these, too).