Which <foreach> Attribute Specifies Element Alias?

The correct answer is 'item'.

The '' tag in MyBatis is used to iterate over a collection or array. The 'item' attribute is used to specify the alias of the element being iterated. This alias is used to reference the element within the body of the '' tag.

For example:

<foreach collection="list" item="item" separator=",">
  #{item.name}
</foreach>

In this example, 'item' is the alias for each element in the 'list' collection. Inside the '' tag, we can access the 'name' property of each element using the alias 'item'.

The other options are incorrect:

• 'OA' and 'OB' are not valid attributes of the '' tag.
• 'collection' is used to specify the collection or array to iterate over.
• 'index' is used to specify the index of the current element in the iteration.
• 'separator' is used to specify the separator to use between each iteration.

Therefore, the correct answer is 'item'.