Roger wants to check whether a user has or has not entered data in a text field. How can he perform this validation?

Which best explains why a digital leader would join a society specializing in technology

Which operating system is a version of linux?

Technician a says that with self-adjusting clutch systems, the release bearing constantly rotates. technician b says that the ball bearing portion of the release bearing should be lubricated with high-temperature grease during routine maintenance. which technician is correct?