Which language needto learn after completing Btech in ECE.. REGARDING software language I am asking
Firstly, you need not have to learn a particular language. You just need to be expert in one
Object Oriented Language
and that's enough. That OOP's language can be C++, JAVA, or Python, that's your choice.
Secondly, if you are planning to join banks, then JAVA would be a good choice to learn and that will be enough. You don't need to learn any other language.
If you are planning to learn Machine learning, then Pyton would be a good choice.
Just be fluent with one OPP's language and be clear about the OPP's concept, and you are done. You can surely clear any interview.
ALL THE BEST