IIT Delhi - Indian Institute of Technology Answered Questions

Well, I think I am capable enough to answer the question as I took a drop and cleared JEE then. First of all, it is really necessary to know in what concepts you are sound and in what concepts you can't even handle board level questions. Secondly, as you decided correctly, sitting idle would just make you resistive towards long study hours, which is a basic requirement of JEE. So start studying, I'd suggest start with making a time plan from today until the repeater batch starts. For that, just go through the previous questions that you gave in your coaching or somewhere and analyses what kind of questions went incorrect and you would then observe a pattern that a particular type of question or particular topic is weak and you end up wasting time every time in the same question. This needs to be corrected. Analyze this, identify the questions or the topics start reading them, read give them time, practice as much as you can practicing the same kind of questions again would help you getting the edge in the ranks and marks in the tests. Utilize the time in balancing the scoring in every subject as you never how AJEE paper might turn out. Try to revise the topics that would be covered initially in the repeaters batch as this would boost your test rankings in the initial which will increase your confidence level and believe me good ranks in tests matter a lot and that confidence in yourself helps you solve 3 - 4 extra problems out of your capacity. Don't be harsh on yourself as in repeaters batch they will start everything from datum considering that you have only basic knowledge or no knowledge about the topic. If you have more queries, direct it on the portal.

To be frank your SI score will be very low with these marks. IIT, Delhi takes into consideration all the marks and extra-curricular. Students even with good CAT score don't make it to next stage if SI score is low. So as per my understanding, it is very difficult to get in even 1st stage of the process with these marks if you are a general category student.

The list for the batch of 2018-20 is already out. If you have applied please check here:
http://dms.iitd.ac.in/mba-full-admission.html
Also, 76% is a low percentile but the ultimate convert depends on the SI score which takes into consideration a lot of other parameters as well.
Try to score more than 90 percentile to get the interview call.

There are some basic books like Schaum's series and Denis Ritchie for the introductory knowledge and then believe me it's just practice and practice. You can either do it on online platforms like geeksforgeeks.com or hackerrank.com or any other similar and even if you want to head for up for some more literature. Here is the link http://www.codingdojo.com/blog/9-best-programming-books-read-right-now-want-distinguish/