Final answer:
JavaScript is indeed used to validate data entry in Web forms, a practice which is True. This feature improves user experience and server efficiency by ensuring that only valid data is submitted.
Step-by-step explanation:
The statement that JavaScript can be used to validate data entry in a Web form is true. JavaScript is a powerful client-side scripting language that is commonly used to enhance the functionality of websites, including the validation of form data before it is sent to a server. This is important because it allows for quick feedback to the user and reduces the amount of processing the server has to do with invalid data.
For example, JavaScript can check whether a required field is filled in, if an email address is in the correct format, or if a password meets certain complexity requirements. These checks can occur as soon as the user leaves a form field or when the user attempts to submit the form.
By using JavaScript for validation, developers can provide a better user experience, as well as cut down on unnecessary server load and potential security risks associated with processing invalid data on the back end.