The answer & explanation for this question is given in the attachment below.
Answer: Mechanical machines that use liquids to move.
A one-way flag<span> can also be </span>used<span>, for example, to watch errors occuring in input data so that the program </span>could<span> ask the inputs again. A </span>variable<span> is a temporary if its value is always needed only for a very short period.</span>
Answer:
Quality of service (QOS).
Explanation:
In recent computer networking, the convergence of voice, video and text data packet has been made possible. There is no need for a dedicated network for a particular type of packet.
QOS or quality of set is a service rendered to voice or audio packets in VoIP phones to enhance communication.
The email is a digital mailing system that can be used to send all three packets. It enjoys the QOS as voice packets. It is given high preference for transmission and uses the TCP protocol to transmit data reliably.