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

eight lines used to transfer data among the registers
sixteen bidirectional lines that are used for data transfer between the microprocessor and memory
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

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Computer Basic Information
The essential difference between an operating system like Linux and one like Windows is that

there are multiple versions of Linux, but only one version of Windows.
Windows can run with an Intel processor, whereas Linux cannot.
Linux is proprietary, whereas Windows is not.
any programmer can modify Linux code, which is not permitted with Windows.
None of these

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