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I’m a C# developer and I use data structures such as List and Dictionary all the time, I’m reading some interview books and they all seem to suggest that we should know how to implement such data structures as well as how to use them, do a lot of you share the same viewpoint?
Yes.
For the same reasons that a C or C++ programmer should be familiar with assembly language; it helps you understand what is going on under the hood, and improves your ability to select the appropriate data structure for your particular programming problem.
In the same vein, you don’t have to write a compiler use your favorite programming language effectively, but you can greatly improve your knowledge about that language by writing a compiler for it.