About solving challenges

Is there any deadline for solving challenges too? I mean something like solving challenges after the specified date, points won’t b awarded or something like that.

Yes,
when your course is active, Mentors will give you enough time to complete your contest as soon as possible.
Even after your course is over, you will have a certain amount of time when you can complete your contest & you will be rewarded with the points on solving the questions too.
But, if your course completion date has gone too far then, you will be able to solve the problems & look if it is correct or not, but you will not rewarded for that afterwards.

I hope you doubt is resolved,
If you have any other doubt, please feel free to ask.