47. Why usually not necessary to include testing for the number : 1321009.
47. Why is is usually not necessary to include testing for the number of characters in user input in custom validation functions??
48. What does a function to validate required fields generally need to do??
50. If you were designing a form with a question that asked users if they had ever visited a certain city, would you expect more accurate input using a text input box or a check box? Why??