It doesn't even prove you know the target language: all of these coding interview questions involve writing everything in one file, a couple of functions, and using only arrays and integers/strings. Not how well you know the language, its features, abstractions, data structures, standard library etc. Just whether you can write a for loop (and only the kind involving i= 0; i < length; i++ type, not anything fancy or even understanding how the for construct works).
On these coding platforms like algoexpert, they claim to support 7 languages (all with imperative constructs), for all problems. What does that tell you? That all of these problems involve very basic imperative constructs - they're not going to write an idiomatic solution within each language, because there's no need.
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It doesn't even prove you know the target language: all of these coding interview questions involve writing everything in one file, a couple of functions, and using only arrays and integers/strings. Not how well you know the language, its features, abstractions, data structures, standard library etc. Just whether you can write a for loop (and only the kind involving i= 0; i < length; i++ type, not anything fancy or even understanding how the for construct works).
On these coding platforms like algoexpert, they claim to support 7 languages (all with imperative constructs), for all problems. What does that tell you? That all of these problems involve very basic imperative constructs - they're not going to write an idiomatic solution within each language, because there's no need.