if we wrote ecet or leet exam then we change eee branch in diploma to btech cse it is possible
Yes , you can definitely get lateral entry in btech cse after giving ecet examinations.
After your diploma in EEE you can go for btech lateral entry in CSE.
In this case it will be of 3 years rather than normal btech which is of 4 years. It means that you would straight away get enrolled into the 2nd year of your bachelor's degree.
All the best.