本内容遵循CC 4.0 BY-SA版权协议 前阵子有位准备华为OD机试的读者问我一道题，说是C卷里的100分题，题干短到令人发指：给你一个整型数组，按每个元素的个位数从小到大排序。就这一句话，没有别的花哨修饰。但我拿这道题给几个学 Java 的朋友做了个小测试 ...

网上关于 Arrays.asList 和 ArrayList 的文章一抓一大把，但大部分都是互相抄，讲不到根子上。今天我就把这个面试高频题一次说透—— Arrays.asList 返回的到底是个什么东西，它和平时 new ArrayList () 出来的对象在底层实现上有哪些本质区别，以及你工作中如果真遇到这个“坑”，该怎么排查和规避。

// Most asked problems at FAANG companies: https://docs.google.com/spreadsheets/d/1hzP8j7matoUiJ15N-RhsL5Dmig8_E3aP/edit#gid=1377915986 ...

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