What is the small window that pops up in a application that requieres a response for the user

Two technicians are discussing the common u-joint. technician a says its input and output speeds should be equal. technician b says that it normally has two yokes. which technician is correct?

Which best describes the condition under which the unicode output is the same as plain text?

Which best compares appointments and events in outlook 2010appointments have a subject man, and events do notappointments have a specific date or range of dates, and events do notappointments have a start and end time of day, and events do notappointments have a location option, and events do not