Final answer:
A Bus Monitor on a Data Bus with no data typically shows a high impedance state or an idle state voltage, indicating no active communication. This is essential for debugging and diagnostics of data transfer within computer systems.
Step-by-step explanation:
When there is no data on the Data Bus, a Bus Monitor would typically show either a high impedance state, represented as a series of 'high' or '1' bits, or it may display a default or idle state voltage which is not representative of active data, but rather the absence of it. Bus Monitors are designed to report on the electrical and logical states of the lines within the bus system, and if no devices are actively communicating, the lines might float to a default state determined by the bus interface specifications or pull-up/pull-down resistors.
The Data Bus is part of a system that facilitates data transfer between different components inside a computer, such as the CPU, memory, and I/O devices. In general, Bus Monitors are used for debugging and diagnostics to ensure that the data being transferred over the bus is correct and to troubleshoot issues. When there is no data transfer occurring, the monitor can help determine if the bus is in a ready state for communication, or if there's a potential fault preventing communication.