Thanks for your appreciation, yes, you can feel free to use the article for educational purpose. Regarding your question, I agree with you but the irony is that there is a big gap between the interview and the actual work you do. That's why only general skills are tested like learning ability, problem-solving etc. Now companies are moving towards more stringent online coding test where you need to code a scenario based program but still that's far away from what you will do in the actual job.
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