Iowa Code § 630.4: Debtor interrogated.

The debtor, on the debtor’s appearance, may be interrogated in relation to any facts calculated to show the amount of the debtor’s property, or the disposition which has been made of it, or any other matter pertaining to the purpose for which the examination is permitted to be made. The interrogatories and answers shall be reduced to writing and preserved by the court or officer before whom they are taken. All examinations and answers under this chapter shall be on oath.