It's an FM spell, so you're forcing an answer through overcoming an RR.
Normally this is noticeable. It's neither a (s)ubtle or an (i)nformational spell, if the target makes the RR or not they feel being compelled to reply.
Some GMs bend this a bit. If the GM feels the spell itself isn't noticeable in their game, then the nature of the questions and context of asking matter.
Like, if you cast it on someone and ask "What the time?" they might not really question the compulsion to answer.
If you ask "What's your login and password for the CIA mainframe?" they may either question why they answered that question, or just take action to fix that breach of security right after answering, either by having you arrested, or changing their login or password.
This is often an issue with Fm spells, like if you charm kind someone, will they realize they've been mind controlled when the duration runs out? A lot depends on how it's used, how well the caster works it into a plausible scenario and how common magic and mind magic in particular is.
For example, walking up to a woman in a bar, flirting a while, chatting, getting along well, then using Question for "What's your phone number?" will get you the number if they fail the RR. . .and the build up makes the situation plausible, even if they normally don't give their number to people they meet in bars. . .If you just roll up on them, cast "What's your phone number?" that's weird, and out of context, and they will strongly wonder why they gave it to you.
In a world where mind magic is unheard of, they may just wonder why they felt compelled to answer, in a world with lots of mind magic they may immediately suspect.
