As you want to get the details that is this information is true that backlogs are common in B.Tech student's life and will those backlogs affect future career opportunities so here is the information of the same for you:

Only those people who are lazy and neglect their studies will have backlogs.
Moreover B.Tech is not hard to study when compared to our 10th and 12th standards.

It is very easy if you follow your lectures carefully with out any avocations.

But even if you have backlogs, they it won't affect your career opportunities.

If you can clear all those backlogs and come out of the college with a minimum of 60%, then your future will be very bright.