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More on reddit.com

Bro luck not favoured you, even though you explained the solution, but sometimes recruiters will expect what they want, we can't do anything 🥲😔 More on reddit.com

Depends on the interviewer. A couple reasons come to mind: Interviewer doesn't understand them. I work at a Java shop and you'd be surprised how many people here don't know what streams, lambdas, functional programming, etc... are. They've been here forever and still live like it's Java 7. And honestly that's fine in terms of delivering product so there's no push to change. So interviewers just tell you not to use them because they don't understand what you're doing. A stream doesn't demonstrate the knowledge they're looking for. For example I ask you to sort an array, I don't want you to write "array.sort()". I want you to think about the input and write the appropriate algorithm for it using more basic building blocks. Many interviews are sort of depth first searches on your knowledge. They'll ask you to do something. Then give you a variation to solve. Then maybe they'll keep changing it, or probing your knowledge, to see how deeply you understand the problem area. It could be that using streams passed their first check and now they want to see what else you know. More on reddit.com

There aré a lot of excercises here: https://github.com/stuart-marks/LambdaHOLv2 More on reddit.com