#### Find the most common value in each column of a table with two columns.

Given a table with two columns, find the most common value in each column using a SQL query.

#### Problem

```Given a table with two columns, write a SQL query to find the most common value in each column.
Input:
id | col1 | col2
1  | 3    | 2
2  | 3    | 2
3  | 3    | 1
4  | 1    | 2
5  | 2    | 1
Output:
col1 | col2
3    | 2```

#### Solution

This solution is in SQL. Our A.I. can create solutions in multiple languages.
```SELECT col1, col2
FROM table
GROUP BY col1, col2
ORDER BY COUNT(*) DESC
LIMIT 1;

/*

The above solution is optimal because it uses the GROUP BY and ORDER BY clauses to group the rows by the values in each column and then order them by the number of times each value appears in the table. The LIMIT clause is then used to return only the first row, which is the row with the most common value in each column.

*/```

A.I. Evaluation of the Solution

The candidate's solution is correct and demonstrates a good understanding of SQL. The solution is also efficient, using the GROUP BY and ORDER BY clauses to group and order the rows by the values in each column, and then using the LIMIT clause to return only the first row.

Evaluated at: 2022-11-20 08:15:56