I prefer to study BTech IT course,what course i can study in cse now in my holiday based on career option

If you want to do BTech in IT, you can use your holiday to learn useful courses in Computer Science (CSE) that help your career. You can study programming languages like Python, Java, or C++. Learning web development (HTML, CSS, JavaScript) is also good. Try data structures and algorithms to build strong basics. You can also explore database management and basic networking. These courses will help you in your BTech and improve your job chances later.

Hii

You can go through these subjects in holiday-

Data structure and algorithm, Machine learning,  web development,  Android development .

If you master any of subject in these holiday than it will definitely help you lot during your placement. At least you need to know web or app development. Data structure is must.

Hope it helps