I'm spending most of my off hours with any number of dev stack technologies - RoR, Angular, Meteor, Python, R, D3, etc - basically anything that looks moderately interesting. I've developed a razor-thin knowledge layer of each. Not enough to impress a hiring manager, but enough to keep going.<p>I've invested in all the right books (O'Reilly & Pragmatic probably love me), have spent time on a few e-learning sites, and read cloned GitHub repositories late into the night.<p>There's little chance of using these tools in my day job. (Dilbert has NOTHING on that place.) Building toy apps that gather dust in a forgotten corner of GitHub is fine - but they don't tell me whether I'm any good.<p>I've heard of companies using InterviewZen to screen applicants. Can anyone recommend a good site for self-testing?
The two main sites that I find myself going back to practice interview questions (non-algorithmic) are Codewars (<a href="http://codewars.com" rel="nofollow">http://codewars.com</a>) and Project Euler (<a href="https://projecteuler.net" rel="nofollow">https://projecteuler.net</a>). Give them a shot sometime!
Codility (<a href="https://codility.com/" rel="nofollow">https://codility.com/</a>) is mostly for companies to provide coding tests to candidates, but they have some free examples which you might find insightful.