某个不确定有限自动机（S0为初态，S3为终态）如下图所示，（ ）是该自动机可识别的字符串（即从初态到终态的路径中，所有边上标记的字符构成的序列）。
- A.baabb
- B.bbaab
- C.aabab
- D.ababa
正确答案及解析
正确答案
解析
确定的有限自动机（S，∑，f，s0，Z）
S是一个有限集，其每个元素称为一个状态
∑是一个有穷字母表，其每个元素称为一个输入字符
F是S× ∑→S上的单值部分映射
f(A ,a)=Q 表示当前状态为A，输入为a时，将转换到下一个状态Q，称Q为A的一个后记状态
s0 ∈S，是唯一的一个开始状态
Z是非空的终止状态集合，Z?S
非确定的有限自动机与确定的区别
F是S× ∑→2S上的映射
对于S中的一个给的状态及输入符号，返回一个状态的集合。即当前状态的后继状态不一定是唯一的
有向弧上的标记可以是?
题干中有限自动机对应的正规式为：( a | b )* a b b，即以abb结尾的序列，题干选项中符合以abb结尾的选项为A
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