[cultyyy123]

No. A lot of job posts out there that highlights the language version. For example, I saw a lot of job posts for C++11, C++17 so on. Heck even, some jobs directly mentions Modern C++.

https://jobs.smartrecruiters.com/FireEyeInc1/743999738511776...

They can also look at the creation date of company and make a educated guess.