Questions

A bus is a group of conducting lines that carriers data, address, & control signals.

A bus is two or many wire communication method. A bus which communicate between two active devices, it may transfer address, data etc..

Hard real-time systems required to complete a critical task within a guaranteed amount of time.
Soft real-time computing requires that critical processes receive priority over less fortunate ones.

Convection is by far the most efficient and common way for heat to be transferred through liquids and gases. It occurs when some regions of a fluid get hotter than others, causing currents in the fluid that move it around to distribute that heat more evenly.