cheat sheet link
21 Cheat Sheets for Data Science Interviews - KDnuggets
With data science being such a broad and constantly developing field, it's really impossible to have all the knowledge in your head. Especially if some of this knowledge you use only occasionally. Also, if you're a beginner in a certain field, you'll have to refresh very often what you learned until it becomes actual knowledge at the crossroads of theory and practice. Having something that you could look at and get the info you need at a glance would be pretty helpful, right? That'something' is called a cheat sheet. And it has nothing to do with cheating.