Missing a lecture amounts to missing two and half hours teaching. As the subject of Computer Programming is conceptual and as every lecture is linked logically to its predecessor and successor, no student can afford to miss even a single lecture in the entire course.
Even though students are normally expected to attend only their own batch, only under exceptional circumstances, if a student misses a lecture, only with prior approval from the office a student may attend equivalent lecture in the other batch. This approval will depend on the vacant seats available in the other batch where he wishes to attend the said lecture.
If a student misses a lecture and could not also attend equivalent lecture in other batche, then before attending the lecture he should on his own make himself up to date with the level of the class by studying whatever he has missed.