Snowflake ML/AI engineer OA

一共三题，其中两题在以前的帖子都有提，

• hypothesis testing。
• 字符串匹配。Given an array of strings, each of the same length, and a target string, construct the target string using characters from the strings in the given array such that the indices of the characters in the order in which they are used form a strictly increasing sequence. Here the index of a character is the position at which it appears in the string. Note that it is acceptab
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  erent string in these constructions. Since the answer can be very large, return the value modulo (10^9 + 7).
• 还有一个。

新人求加米。