Hi aspirant

Visit the link given below to download free ebooks and sample paper that are provided by careers360.

https://engineering.careers360.com/download/sample-papers

https://engineering.careers360.com/download/ebooks

Visit the link below to know more about CSE:

https://www.careers360.com/computer-science-engineering-course

If you are preparing for GATE then you can buy study materials from Made easy,Ace academy ,The GATE Academy from Amazon/Flipkart .These are best.

Online resource could be GRADEUP .

Hope this was helpful.