Should Teachers encourage Questions from students?

A teacher can either deliver lectures and expect her students to understand everything without having any doubts. Alternatively, she can explain concepts to the students and encourage them to question everything to resolve their doubts or queries. I feel the second option is a better alternative as it enhances learning. During the course of the lecture, the students might come up with certain doubts about whatever is being taught, or they might be inquisitive to …

…entire class away from the main topic. The teacher could address such doubts, which often could be genuine, with the student individually after class hours. In spite of the problems associated with this approach, I still feel encouraging students to ask questions is one of the best approaches to teaching. It leads to a thorough understanding of concepts and complete involvement from each student, thus, making the entire learning process more productive and hence effective.