Same goes for problems in data structures and algorithms (read: hackerrank / leetcode problems)
Some people will recognize patterns pretty fast, while others must solve literally hundreds of different problems, before becoming comfortable with the concepts.
People always seem amazed and baffled that some candidates can practically walk into white-board interviews unprepared, other than what they learned / did in their DS&A classes in college, and nail the interviews, while others have to basically prep 6-12 months before passing the same interview.
Some people will recognize patterns pretty fast, while others must solve literally hundreds of different problems, before becoming comfortable with the concepts.
People always seem amazed and baffled that some candidates can practically walk into white-board interviews unprepared, other than what they learned / did in their DS&A classes in college, and nail the interviews, while others have to basically prep 6-12 months before passing the same interview.