假设需要对编码为1010010（八进制表示为122）的数据进行偶校验并将校验位加在最高数据位之前，则增加校验位之后的编码用八进制表示为（ ）。
- A.322
- B.642
- C.222
- D.242
正确答案及解析
正确答案
解析
奇偶校验是最常用的检错方法，通常是在信息码后增加一位校验位，使码字中的1的个数成奇数（奇检验）或偶数（偶校验）。
本题1010010采用偶校验编码为11 010 010，对应八进制数为：322
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