What are the best programming languages to learn for A: Job Security, B: Usefulness, and C: Resource Efficiency?

Question

And what language has all of these qualities?

Answer 1

thanks

Answer 2

It depends on the type of job you want. But in my opinion, I think python3 is good.
The 7 Most In-Demand Programming Languages of 2018 ---- https://www.codingdojo.com/blog/7-most-in-demand-programming-languages-of-2018/