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博世面试真题拆解:CAN/LIN/AUTOSAR OS

  • 2026-08-05 02:54:54
博世面试真题拆解:CAN/LIN/AUTOSAR OS

博世面试真题拆解：CAN/LIN/AUTOSAR OS

博世今年面试考了哪些通信协议和OS题型？整理了真实题目 + 考官关注点，转行前先看懂这些。
1. CAN总线仲裁机制：显性位覆盖隐性位，ID越小优先级越高，面试必考逻辑
2. LIN主从架构只有一个主节点，从节点不能主动发报文，与CAN的本质区别在这里
3. AUTOSAR OS任务调度：优先级抢占 + 时间触发混用，搞清楚Task和ISR的边界
4. MCU外设DMA传输：CPU不参与数据搬运，面试常问DMA和中断各自适合的场景
5. SPI/I2C如何选：速率、从机数量、硬件成本三个维度，博世面试题原题复盘
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  1. CONNECT:[ UseTime:0.000366s ] mysql:host=127.0.0.1;port=3306;dbname=no_15386;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000541s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000232s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000266s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000467s ]
  6. SELECT * FROM `set` [ RunTime:0.000188s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000572s ]
  8. SELECT * FROM `article` WHERE `id` = 470850 LIMIT 1 [ RunTime:0.000428s ]
  9. UPDATE `article` SET `lasttime` = 1785902947 WHERE `id` = 470850 [ RunTime:0.025175s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000275s ]
  11. SELECT * FROM `article` WHERE `id` < 470850 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000958s ]
  12. SELECT * FROM `article` WHERE `id` > 470850 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007018s ]
  13. SELECT * FROM `article` WHERE `id` < 470850 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.020015s ]
  14. SELECT * FROM `article` WHERE `id` < 470850 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.017732s ]
  15. SELECT * FROM `article` WHERE `id` < 470850 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.036747s ]
0.200893s