LOL. The data structures I can see, but what algorithms are considered standard will vary from domain to domain. A good engineer can look these up. I dare you to find an engineer that knows ALL of the LeetCode perfectly on the first try.
I don’t get the “LOL” from you but ok. Anyway, the fundamentals are in textbooks for a reason, they aren’t domain specific. To answer your other question, I could definitely solve most leetcode and so could my colleagues. Maybe not perfectly optimally first try for all but who cares about that.
Then you keep interviewing until you get the ones you know. There's luck involved with everything. Luck in the sense of the right time at the right place.
Sorry. Yeah, I probably misread wha you wrote or read some other comment. Anyway, to answer your earlier question, good interviews are a conversation and allow you to demonstrate your knowledge and problem solving abilities. It’s ok to start with a suboptimal solution to a problem and iterate. If you already know the perfect solution to one problem then a good interview will move on to another problem so it’s not that useful.