Which of the following is not a characteristic of input technologies?

The correct answer indicates that the characteristic in question, which involves delivering feedback to users, is not typically associated with input technologies. Input technologies are primarily designed for the purpose of capturing and entering data into a system. Their main function is to facilitate user interaction with the system by allowing users to provide information or commands.

While user interaction (as mentioned in the first choice) is indeed a key characteristic of input technologies, the authentication of users (the second choice) is often a separate function that involves security measures activated after input has been entered. The inclusion of devices like keyboards and mice (the fourth choice) is a defining feature of input technologies, as these are classic examples of tools used to enter data.

Feedback is generally more associated with output technologies, which present information to the user, rather than input technologies that focus on data entry. Thus, the notion that input technologies are responsible for delivering feedback distinguishes this characteristic as not being aligned with the primary features of input technologies.