> "An interesting question you may ask in C++ is: “How would you declare a function that takes a blob of memory as input?”"

> "Now, suppose that you want to pass to this function a custom structure, like this:"

You would create another function that actually works based off that structure, rather than using your first function which operates on a set of bytes in memory. That way it's readable, like they want, and type-safe

I find this to be a snarky non-answer. You really think everyone should write their own memcpy for every POD type they want to memcpy?