Between 1917 and 1935, the Communist government had tried to implement a radically new evaluation system with no grades at all, but it never fully took root.
Grading varies greatly from school to school, university to university and even teacher to teacher, and tends to be entirely subjective even for courses that lend themselves to objective marking such as mathematics and applied sciences.
Even though the grades technically range from "1" to "5", "1" is not very common and is rarely given for academic reasons—in many cases a "1" is given as a result of failure to show up for an exam or to answer any questions.
"Zachòt"-type subjects are also called "non-exams" due to lack of numerical representations.
Each university applies its own standards of the level of knowledge required to pass each course.