面试百度的机器学习算法,也不过如此

2019/04/10 10:10
阅读数 14

<div class="output_wrapper" id="output_wrapper_id" style="font-size: 16px; color: rgb(62, 62, 62); line-height: 1.6; word-spacing: 0px; letter-spacing: 0px; font-family: 'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; background-image: linear-gradient(90deg, rgba(50, 0, 0, 0.05) 3%, rgba(0, 0, 0, 0) 3%), linear-gradient(360deg, rgba(50, 0, 0, 0.05) 3%, rgba(0, 0, 0, 0) 3%); background-size: 20px 20px; background-position: center center;"><blockquote style="line-height: inherit; padding: 15px 15px 15px 1rem; font-size: 0.9em; margin: 1em 0px; color: rgb(129, 145, 152); border-left: 6px solid rgb(220, 230, 240); background: rgb(242, 247, 251); overflow: auto; overflow-wrap: normal; word-break: normal;"> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 0px;">本文已经收录至我的GitHub,欢迎大家踊跃star 和 issues。</p> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 0px;">https://github.com/midou-tech/articles</p> </blockquote> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">机器学习整体难度还是有点,不过这个岗位真的是很香,<strong style="font-size: inherit; line-height: inherit; font-weight: bold; overflow-wrap: break-word; padding: 2px 4px; border-radius: 4px; margin: 0px 2px; color: rgb(233, 105, 0); background: rgb(248, 248, 248);">钱多,发展空间足</strong>未来可期啊。</p> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">本篇文章面经是三位大佬面试百度机器学习岗位的面试题,其中两位<strong style="font-size: inherit; line-height: inherit; font-weight: bold; overflow-wrap: break-word; padding: 2px 4px; border-radius: 4px; margin: 0px 2px; color: rgb(233, 105, 0); background: rgb(248, 248, 248);">已经拿到offer</strong>,赶紧复习起来,下一个offer就是我。</p> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">更多的面经和内推信息,请微信搜索 <strong style="font-size: inherit; line-height: inherit; font-weight: bold; overflow-wrap: break-word; padding: 2px 4px; border-radius: 4px; margin: 0px 2px; color: rgb(233, 105, 0); background: rgb(248, 248, 248);">龙跃十二</strong> 即可获取。</p> <hr style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; height: 1px; margin: 1.5rem 0px; border-right: none; border-bottom: none; border-left: none; border-image: initial; border-top: 1px dashed rgb(165, 165, 165);"> <h3 id="h" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">一面</span></h3> <ul style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; padding-left: 32px; list-style-type: disc;"> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">询问简历上做过的项目,以及项目细节</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">算法题:</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">二叉树中序遍历(要非递归解法)</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">两个有序链表的归并。</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">快排</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">lstm 详细讲讲解</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">attetion 机制</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">混淆矩阵,F1等计算</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">n个人进餐馆,都把帽子挂在门口,走的时候随手拿一顶,问拿到帽子恰好是自己的人数的期望</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">ML 与 DL比较</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">实习的一些问题</span></li> </ul> <h3 id="h-1" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">二面</span></h3> <ul style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; padding-left: 32px; list-style-type: disc;"> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">算法题:返回二叉树中路径和为某一值的所有路径、反转句子中单词顺序</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">区块链比赛和专利</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">我惊了个呆,大佬竟然还了解区块链,准确指出了我的区块链项目和专利的不靠谱处(我也知道啊,所以我转ML了啊)</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">项目</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">这个就随便聊了聊</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">AUC计算</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">很奇怪,我面试后看了看发现给出的是正确方法,但是面试官说不对。。。</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">进程和线程是为什么被提出的</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">线程间如何通信</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">快排复杂度的证明</p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">特征筛选方法</p></li> </ul> <h3 id="h-2" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">三面</span></h3> <ul style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; padding-left: 32px; list-style-type: disc;"> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">基础数据结构和算法有哪些</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">是的你没猜错,我把课本罗列了一下,顺序表 链表 哈希表 树系列 图系列,选择插入冒泡希尔堆快速基数外部排序,就过了。。。</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">推荐类算法比较</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">机器学习算法比较</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">聊了聊区块链</span></li> </ul> <hr style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; height: 1px; margin: 1.5rem 0px; border-right: none; border-bottom: none; border-left: none; border-image: initial; border-top: 1px dashed rgb(165, 165, 165);"> <h2 id="hoffer" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.4em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">已经拿到offer</span></h2> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;"><strong style="font-size: inherit; line-height: inherit; font-weight: bold; overflow-wrap: break-word; padding: 2px 4px; border-radius: 4px; margin: 0px 2px; color: rgb(233, 105, 0); background: rgb(248, 248, 248);">这是下一位同学的面经</strong></p> <h3 id="h-3" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">一面</span></h3> <ul style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; padding-left: 32px; list-style-type: disc;"> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">聊项目,聊的非常细,我的项目就是比赛,面试官甚至问了我提分的过程,一开始多少分,做了哪些工作之后升到了多少分之类的; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">跟过拟合有关的一些问题,详细的内容已经记不清了; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">聊xgboost; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">聊deepFM; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">项目中用到了LSTM,为什么可以用LSTM,它的主要用处是什么,以及LSTM的梯度消失问题; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">算法题:二叉树中的最长路径; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">算法题:x的平方根。 </p> <h3 id="h-6" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">二面:</span></h3></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">聊项目; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">聊GBDT; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">算法题:二分查找; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">算法题:最大堆的插入; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">聊deepFM; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">不定长文本数据如何输入deepFM,如果不截断补齐又该如何输入; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">项目中为什么使用LSTM; </p></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">项目中整个过程中都做过哪些优化。 </p> <h3 id="h-7" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">三面:</span></h3></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">n个数中等概率抽取m个数。 </p> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">三面就问了一道概率题,剩下的基本上是聊天。 总的来说面试难度不高,感觉也是我运气好吧。</p></li> </ul> <hr style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; height: 1px; margin: 1.5rem 0px; border-right: none; border-bottom: none; border-left: none; border-image: initial; border-top: 1px dashed rgb(165, 165, 165);"> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;"><strong style="font-size: inherit; line-height: inherit; font-weight: bold; overflow-wrap: break-word; padding: 2px 4px; border-radius: 4px; margin: 0px 2px; color: rgb(233, 105, 0); background: rgb(248, 248, 248);">这是下一位同学的面经</strong></p> <h3 id="h-4" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">一面</span></h3> <ul style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; padding-left: 32px; list-style-type: disc;"> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">给一个数组,数组的数字代表股票价格,求一次买卖的最大股票收益</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">1-n的全排列</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">lstm是什么的升级?解决了什么问题?</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">讲一讲各种激活函数</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">attetion 机制</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">embedding的深层含义是什么</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">c 的const字段有什么意义</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">RF和GBDT的区别</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">为什么GBDT可以提高准确率</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">矩阵分解</span></li> </ul> <h3 id="h-5" style="color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px; font-weight: bold; font-size: 1.3em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">二面</span></h3> <ul style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; padding-left: 32px; list-style-type: disc;"> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">自我介绍</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">讲区块链</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">区块链中51%攻击的经济学原理</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">求树两个节点的最低公共祖先</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">讲kaggle比赛</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">xgboost比gbdt的优化都有哪些</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">为什么xgboost要求二阶导数</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">泰勒展开逼近残差,二阶比一阶精度高</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">通用性,所有二阶可导的loss function都可以用</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">有些函数梯度在一阶上变化小,二阶变化大,参考牛顿法</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">为什么gbdt没有正则</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">讲项目</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">计算一下项目中DNN的参数个数</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">gbdt与lr区别</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">集成为什么会提高效果</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">l1 l2正则</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">xgb lgb调参怎么选参数</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">贪婪搜索呗?面试官觉得不行?难道是贝叶斯参数优化?</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">怎么样在没有得到未来数据的情况下提高模型对未来预测的效果</span></li> <li style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px; margin-bottom: 0.5em;"><span style="font-size: inherit; color: inherit; line-height: inherit; margin: 0px; padding: 0px;">讲道理我觉得这个问的非常扯淡,不就是泛化性,然后我说了一些降低方差的方法,面试官说是对未来预测的准确性,没有get到他的点,最后被说对算法的追求不够。。。。</span></li> </ul> <p style="font-size: inherit; color: inherit; line-height: inherit; padding: 0px; margin: 1.5em 0px;">更多的面经和内推信息,请微信搜索 <strong style="font-size: inherit; line-height: inherit; font-weight: bold; overflow-wrap: break-word; padding: 2px 4px; border-radius: 4px; margin: 0px 2px; color: rgb(233, 105, 0); background: rgb(248, 248, 248);">龙跃十二</strong> 即可获取。</p></div>

原文出处:https://www.cnblogs.com/zhonglongbo/p/12436321.html

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