This is the 5305th most frequent Russian word.
опрос
Survey; poll; questioning.
Here, "опрос" is used to describe a questioning session or a knowledge check conducted formally by a professor or teacher during a lesson.
На уроке профессор провёл опрос по пройденной теме.
During the lesson, the professor conducted a survey on the covered topic.
In this context, "опрос" refers to a formal public opinion survey conducted to gather collective viewpoints or statistics.
В газете опубликовали результаты опроса общественного мнения.
In the newspaper, they published the results of a public opinion poll.
Here, "опрос" is used to denote a final oral or written examination or interview conducted to evaluate students' preparedness or performance.