Terminology
The questionnaires used the term "Nationality", but the sense of this term must be understood as a synonym of ethnicity, as nation can also be defined as a grouping based on language and cultural self-determination rather than on relations with a sovereign state. In the context of former the Soviet Union, nationality is often used as translation of the Russian terms (национальность / natsional'nost) used for ethnic groups, and local affiliations within the post-Soviet countries.
Read more about this topic: Moldovan Census (2004)