This is a straight recall item on the length of a California notary commission, and it is the kind of fact the examination tests directly because it governs when a notary must begin the renewal cycle. A commission runs four years from the commencement date printed on the certificate issued by the Secretary of State, not four years from the date the oath was filed or the bond recorded. The distinction matters in practice: the commencement date is fixed on the certificate, so a notary who delays filing the oath loses usable time rather than extending the term. Renewal requires completing an approved refresher course and passing the examination again before the current commission expires, which is why candidates are taught to work backwards from the printed date.