these sound similar but mean different things:
Backlog = one failed subject you carry while still moving to the next semester with your batch. you clear it next time that exam is held. common and manageable if caught early.
Back semester = you've failed too many subjects in one semester (usually 3–4+), so SVNIT makes you repeat the whole semester. this is a bigger deal — you lose a full semester and graduate late.
why this matters for you:
if you've got a back semester situation, speak to your faculty advisor ASAP about the exact re-exam schedule and what subjects can be cleared in which slot.
Semester back and backlog are two different things. Here is the detailed information on this topic-
The criteria changes from year to year, so make sure to keep a check on that.
Everyone is given a chance to clear their backlogs during the summer semester.
The rules keep changing with time, so it is better to keep yourself updated on the
latest rules regarding backlogs.
In case you are trapped in any of these situations, do not panic. Try to clear your backlogs. Do not be disheartened and remember that things will eventually get better.