Final answer:
A custom form that shows only the fields a user wants is called a form, distinct from surveys like the U.S. Census that collect standardized data through questionnaires.
Step-by-step explanation:
A custom form that shows only the fields a particular user wants to see is called a form. This is different from a survey, which is a structured interview designed to gather data by asking a set of standardized questions. Surveys are used to reveal attitudes, beliefs, or habits of a segment of the population and can result in both quantitative and qualitative data. Questionnaires, which are a common method employed in surveys, come with closed- or open-ended questions, depending on the type of information researchers are seeking. The U.S. Census is an example of a large-scale survey that collects demographic data from residents.