其實唔係,有好多寫左好多年java 基本野都唔識,睇左本thinking in java + java interview book 就已經勁過佢
剩係問Set/List/Map 既分別已經刷走左一半人
再問ArrayList vs LinkedList, ArrayList insert element to middle position time complexity,HashSet 點做到O(1),Hashcode vs equals 點解要一齊寫,又刷多啲人
再問HashMap 要maintain order 點做,再刷走多啲人