Yes/No questions use a single checkbox to store answers in the form of a Yes/No question. They can also be used to accept Terms of Agreement or questions following the convention of "Check here if..."
Yes/No questions are found under Add > Yes/No.
Common and Checkbox Properties
Under the Common tab, enter the Question Text and Label. Optionally set the question behavior to make the question Hidden In Reports. Yes/No questions cannot be set as Required, Read-Only, or Hidden on Device.
Under the Checkbox Properties tab, set default value to either Yes or No.