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

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

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Computer Basic Information
Why is the width of the data bus so important to the processing speed of a computer?

The data bus isn't important to the processing speed of a computer
The wider it is, the more data that can fit into main memory
The narrower it is, the greater the computer's processing speed
The wider it is, the slower the computer's processing speed
The wider it is, the greater the computer's processing speed

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