My question is on form CIT 0205 ( 11-2017 ) E.
Question # 2: During the eligibility period, have you worked, studied or lived in any country other than Canada?
I do not work or live in USA but I attended 1 week training twice in Houston Texas and Denver Colorado USA respectively. No or YES ?
Is the answer YES or NO
Best response is probably "yes" if it was a formal training course and a certificate (or such) was issued upon completion.
BUT only you can decide how to best respond to this. Again, the best answer is probably "yes" but perhaps it is "no." AND the real best answer is what you understand to be an accurate (truthful) response to the question as
YOU understand it.
I'd guess there is not much at stake in how you answer this, either way, relative to taking a brief training course, even if it was a formal course which resulted in being granted a certificate of completion. The more formally structured the training was probably pushes the better answer toward a "yes" but I doubt it matters much. And overall, being more forthcoming and forthright tends to be the better approach, which tends to push the better answer toward a "yes." But how you respond to this question is really up to you, your call.
Observation: More than a few persons applying for citizenship may be inclined to answer questions like this in a way they believe will better help their case. That inclination should be ignored. The best answer is the accurate answer, EVEN IF the applicant apprehends that answer might cause some concerns. Answer accurately. If the accurate answer might raise concerns, consider how to best deal with that; do NOT consider giving a different answer because of that.
Note: Among the more or less obvious assumptions underlying this response, a key one is that all absences from Canada were accurately reported in the presence calculation.