elryry

There are a lot of silly answers in this thread. You have to start somewhere, and the best place to start is with a smaller focus (such as front-end developer). Learn front-end, get a job and grow your skills. The "cloud developer" criteria listed in the original post is boiling the ocean in terms of learning. Most large organizations have very few jobs that I would consider cloud native engineering and their jobs are to make it so that other engineers don't mess things up. To master what's listed under the Azure cloud developer curriculum takes work experience.

In which case they have likely never had their code peer reviewed (this is huge in growth) and they are likely to have never worked on performance optimization. I would not, personally, say that person has given themselves a fair chance to "know" the language. There are likely edge cases to this, but I wouldn't consider this a norm.

Would you qualify someone with no real world experience (you called it "their job", but Open Source developers frequently work in their personal time) as experienced in a programming language? Using Python to move files isn't experience in my opinion (experience and exposure are not fully equal).

or much more importantly, iOS.

I would say you "know" a programming language once you've built working apps in a production environment. A lot of the responses for this question are "who's to know, yadda yadda", but if you've used a language effectively, then you know it.