题目详情

中级软件设计师,模拟考试,2021年软件设计师模拟题3

  • A.abab
  • B.aaaa
  • C.bbbb
  • D.abba

正确答案及解析

正确答案
B
解析

本题主要考查有限自动机。

在题目中,0是初始状态,3是终止状态,通过选项中的字符串可以从初始状态到达终止状态,则说明该字符串能被题目中的自动机识别。也可以理解为依次输入选项中的字符串,可以在该自动机中找到相应的路径。

对于选项A的字符串abab,通过ab可以达到终止状态,然后输入a任然可以有路径,但再输入b时,没有路径与其对应。因此A不可被该自动机识别。同样的道理,我们可以找到字符串aaaa能被该自动机识别。

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