Computer Hardware
After installing a sound card, the system locks up when a parallel port tape backup unit is also used. What is most likely the problem?

DMA
defective LPT port
IRQ
defective tape driver

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Computer Hardware
One of the major components of a PC is the Central Processing Unit (CPU) which can be best described as:

The area that regulates all of the system power usage
The area where ail the of the Basic input/output routines are stored
The area where all of the processing takes place
The device that sends the monitor signals telling it what to display

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