Which bus in a computer system carries the actual data values exchanged…
2017
Which bus in a computer system carries the actual data values exchanged between the CPU, memory, and input/output devices?
Answer: C. Databus — ConceptA computer system bus is divided by the kind of signal it transports. Data lines carry data values, address lines identify a location, and control…
- A.
Control bus
- B.
Logical bus
- C.
Databus
- D.
Address bus
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Correct answer: C
Concept
A computer system bus is divided by the kind of signal it transports. Data lines carry data values, address lines identify a location, and control lines coordinate the transfer.
Application
The stem asks specifically about actual data values exchanged among the CPU, memory, and input/output devices. That transport function belongs to the data bus.
Contrast
The control bus carries commands, timing, interrupt, and status signals used to coordinate operations.
Logical bus is an abstract communication-path description, not one of the standard physical system-bus line groups used for this transfer.
The address bus carries the address that selects a memory or input/output location.
Result
Therefore, the required bus is the data bus (shown as Databus).