Evaluate my knowlage

[Weiss]

Hi. I see many web developers pages where they add knowlage percentage of the thechnologies they know (e.g you can see javascript 80%/html 90% and so on).

My question is how do they evaluate the percentages ? Are there formal online tests or they just write what they think?

Hope i was  clear on my questions. Thanx

[justsomeguy]

There's nothing formal to tell you things like that.  People do it themselves, and it tends to illustrate the Dunning-Kruger effect.  People who just recently started tend to rate themselves highly, and only when you get more into something do you realize how much you don't know.  I wouldn't put any weight on things like that.  If you want to evaluate someone's capabilities look for a portfolio or things they've actually finished.

[Weiss]

Thank you