Each lecture course usually has two mid-semester examinations and one end-semester examination. Each laboratory course usually has one end-semester examination.
Mid-Semester examinations are held in a half-week during the term. These examinations are separated by about a month on each side. End-Semester examinations for laboratory courses are held in the last laboratory session of the semester, during the last week of classes. End-Semester examinations for class-room courses are held in the week after the last week of classes.
Classes and Laboratory sessions continue during the rest of the semester. There is no concept of “study leave” for examinations.