One part of census questions is on dwellings, another part is on individuals. A separate questionnaire was prepared for institutions. Surnames and first names are not recorded during the census.
It is a legal requirement to answer census questions. Sensitive questions are an exception to this rule, the response to these questions is voluntary.

Questions on private individuals

Sex, date of birth, citizenship, place of residence, title of use of a dwelling, marital status, role in household, data on live born children, school attendance, educational attainment, language skills, economic activity, looking for work, occupation, employer, place of work or school, daily commuting to work or school;
Sensitive questions: nationality, ethnicity, mother tongue, religion, long-lasting illness, disability. (Response to these questions is voluntary.)

Questions on dwellings

Address, purpose (type) of dwelling, year of construction, type of wall, form and regularity of use, type of ownership, number of rooms, floor space, public utilities, equipment, number of persons and households living in the dwelling;

Questions on institutions

Address, main activity and legal form of operator, type of institute, number of staff, period of operation, capacity, type of building, number of storeys, year of construction, year of last renovation, type of wall, public utilities, equipment, type and number of rooms, number of health premises, form of catering.