Inter semester is really helpful for clearing backlogs as well as marks improvement.

In inter-semester you will have less syllabus so you can focus more on your core concepts as well as you can improve your marks. Since there will be lesser number of students than a regular semester , you will also have less competition . So you can have a great possibility of getting a good grades. Also the teachers who will conduct classes for Inter semester knows why the students are attending the classes. So they will be very precise and helpful so that you can score a good course.

But to opt inter semester , you will have to sacrifice a month holiday of your after semester break. But this will avail you a great opportunity for developing your concepts as well as your marks.

I hope my answer helps you. Have a great eve!