She's right. One of the biggest misconceptions about frontend engineering is that most of the engineering has already been done for you.Design has the screens. Backend has the APIs. Product has the requirements. So what is left? "Just implement it."This is where systems design becomes important because it does teach you how to think, ask better questions and make better engineering decisions.Who decides where state should live?What becomes the source of truth?What should be cached, and how is it

Java program to count the occurrence of each character in a string using Hashmap - GeeksforGeeks