Sharda University is not that strict. It depends upon the individual teachers whether they allow it or not. Although, using an iPad might not be an issue in practical subjects like digital marketing, MIS, etc.
Some of the students use laptops while the teachers are taking classes, and no one says anything. The safest and polite option will be to ask for permission from the teachers to use the iPad for taking notes. Usually, they will allow you to take notes on any electronic gadgets. In some of the classes, you might not need to note down things because the teachers send you the PPTs or PDFs.