Computer Basic Information
The term USER INTERFACE refers to-

The means by which the user interacts with peripheral devices on the computer.
All of these
How the operating system responds to user commands
What the user sees on the screen and how they interact with it.

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Computer Basic Information
The data bus in 8080A/8085 microprocessor is a group of

eight lines used to transfer data among the registers
eight bidirectional lines that are used to transfer 8 bits between the microprocessor and its I/O and memory
eight unidirectional lines that are used for I/O devices
None of these
sixteen bidirectional lines that are used for data transfer between the microprocessor and memory

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