It depends on the context if you say you had an NDA and can’t elaborate at all on the details that’s a clear red flag as most NDAs you can at least give the context of what it is about I.e. specific job processes, witnesses an event, etc.
If you say you worked for X company but can’t talk about the details of your work because of an NDA then that’s fine but they might call your old employer to verify you did really work there.
It depends on the context if you say you had an NDA and can’t elaborate at all on the details that’s a clear red flag as most NDAs you can at least give the context of what it is about I.e. specific job processes, witnesses an event, etc.
If you say you worked for X company but can’t talk about the details of your work because of an NDA then that’s fine but they might call your old employer to verify you did really work there.