Pluralsight has self-assessment tests for various languages and technologies - https://www.pluralsight.com/product/skill-iq https://www.pluralsight.com/product/

Pluralsight has self-assessment tests for various languages and technologies - https://www.pluralsight.com/product/skill-iq https://www.pluralsight.com/product/skill-iq I've only done the Python one myself but it did seem to ask questions on some fairly esoteric stuff, from what I vaguely remember.