To become a computer science Engineer You need to take admission into an Engineering college. There are different entrance exams but Many Institute offers admission based on Join Entrance Exams, JEE Main which is held twice a year offers admission into NITs, IIITs, and GFTIs, and JEE Main also serves as the qualifying exams to appear for JEE Advance, which offers admission into India most Premiere Engineering colleges IITs. Apart from this two exams, there are many state govt exams and some exams are organized by Private Institutes such as BITS, VIT.

Now its time for You to decide that from which Institute you want to pursue Engineering, There is only a single exam is considered for admission into any college but if you are not sure about qualifying the exam then You should appear for Multiple exams.

Dear Aspirant

You are in 10th standard. 

So first of all there are 2 cases either you continue with your school and complete your 12th and after that you get into Btech with computer Science.which you will get by give JEE and other several entrance exams for the college you desire to go.

Or you can get into Diploma in Engineering with computer Science right after 10th. 

All the Best, further queries are always welcomed.