What is the basic idea needed before joining B.Tech in computer engineering?

Honestly Speaking there is nothing that you definitely need to know before joining CSE. The programming taught at school level in India is such that you can catch up with others, well most of them, with just 10-15 days of practice. Also first years do not have a complete CSE specific course and all subjects are taught here so there may be only one or two programming related courses in first year. However If you have zero or little knowledge of programming I would suggest you learn Basics of C and C++ programming from a beginner level book like Let Us C by Yashwant Kanetkar to get up to the level of most of the class. Also to get yourself an advantage when entering 2nd year , I would suggest you do the following things in first year : 1) Start competitive programming on either <a rel="nofollow" target="_blank" href="http://Codechef.com" style='word-wrap:break-word;'>http://Codechef.com</a> or Sphere Online Judge (SPOJ). It really helps develop your problem solving ability and improving your programming skills. 2) Try to complete one or two beginner level courses from edX or Coursera. My personal favourite is Introduction to Computer Programming(<a rel="nofollow" target="_blank" href="https://www.edx.org/course/mitx/." style='word-wrap:break-word;'>https://www.edx.org/course/mitx/.</a>.) 3) Try learning some extra languages like Python, Java or maybe something related to Web Development. This will help when you do projects related to CSE. Good Luck

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