Question: You are working with an XML document that uses an XML schema. How do you specify that an element can appear multiple times inside its parent element?

1. Set the maxOccurs attribute to a large number, such as 1.000
2. Set the maxOccurs attribute to 0
3. Set the maxOccurs attribute to undefined.
4. Set the maxOccurs attribute to unbounded.

Answer: The correct answer of the above question is Option D:Set the maxOccurs attribute to unbounded.