what languages to be known for a professional software designer

Question

plz ans

Answer 1

which is widely used top3

Answer 2

See
http://www.tiobe.com/tiobe-index/
and
https://www.techworm.net/2016/09/top-10-popular-programming-languages-github.html
and
http://www.codingdojo.com/blog/9-most-in-demand-programming-languages-of-2016/
and
https://en.m.wikipedia.org/wiki/Measuring_programming_language_popularity

You will see, that the rankings differ. I think the better way of doing research is to check job offers in your region. Then you will find out, what is needed by the companies.