校招 未知部门 / 硬件工程师 / 一面/二面

<h2>百度嵌入式面经 一面 二面 反思</h2> <h3>一面</h3><ol><li>项目阐述，引出问题</li><li>头文件的包含？</li><li>宏的作用，宏定义的函数？</li><li>vector的使用，扩展内存这些？</li><li>虚函数理解，底层？</li><li>二分法的应用？（说了AVL平衡二叉树）</li><li>红黑树的怎么保持平衡的？（同5：说了AVL平衡二叉树）</li><li>map和unordered_map的区别，关于hastable表的实现？</li><li>ROS的里面的知识？（不会，没有答出来，简历删除掉）</li><li>Git的base rebase merge的使用场景</li><li>嵌入式 IIC 和SPI具体使用，以及相关的配置。IIC的上拉电阻？（两个作用，高电平，开漏输出）</li><li>进程间通信</li><li>Linux系统如何使用，交叉编译器使用过吗？linux驱动没有写过是吧</li><li>C/C++的基本问题（一些常见的八股文，整体上从C/C++对照着说）malloc和newC/C++static关键字C/C++内存布局，malloc和new的关系两个栈实现队列数组和链表的关系（从内存、性能、操作复杂度上来说）</li><li>反问具体的问题部门多少人深圳？具体的业务？能力提升的地方？IIC上拉电阻的另一个作用</li></ol><h3>二面</h3><ol><li>主要描述项目问题</li><li>介绍项目</li><li>项目中的难点以及突破</li><li>嵌入式linux驱动是怎么写的？这些问题不太理解，直接说不问了？</li><li>你的项目有哪些是基于linux系统做的。</li><li>项目中关于嵌入式方面的优化点，</li><li>比较一下串口、IIC、SPI通信的特点（我从自己实际项目中使用的情况说了一些）</li><li>自己飞控的mahony互补滤波算法的设计？</li><li>飞控的实现过程？每一步都做了哪些工作？是从0开始的吗？讲一下</li><li>项目中介绍：IIC的具体协议原理</li><li>问了freertos一点问题</li><li>一道 螺旋矩阵（没有过，是因为没有初始化vector）</li><li>具体比赛中遇到的问题，以及如何解决的？说一下思路。</li><li>反问？</li></ol><h3>反思</h3><p>一面：非常感谢一面的面试官所给予认可，并且面试中对我进行了很好的引导，让我对自己有一定的信心，第一次面试大厂，也是第一次得到大厂的工程师的认可，可以是说对于后面的面试增加很大的自信，也让自己知道自己那些地方可以，那些地方不足，需要补充。</p><p>百度由于一面比较好，就继续约了二面，二面是中规中矩，没有太多突出的地方，主要聊自己的实践项目多一些。</p><p>最后，很感谢百度给机会，后续到很晚的时候，大概隔了有一个多月，电话沟通了offer，太感谢百度给这次机会🙏🙏，再次感谢百度的面试官的引导。</p><p></p><p>之前参考的一个指南比较好 有需要的同学可以看看</p><h1>嵌入式软件工程师面试完全指南</h1><p>面经一共3<strong>2篇文章，12w+字数</strong>，包含全部最新的面试必问考点，<strong>4.7w+同学学习，3300+订阅</strong>，非常适合在找工作面经薄弱的同学，销量即是口碑，提前订阅提前享受，持续更新中。</p><p>原帖链接：<a 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