Computer Hardware
On a leased line installation a known good external modem shows no carrier detect light. Where is the problem most likely to be?

In the phone line
In the modem
In the computer
None of these
In the DTC equipment

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Computer Hardware
After displaying the directory of a floppy disk, a different floppy is inserted into the drive. The contents of the original floppy continue to display regardless of the director requests on the other floppies placed in the drive. You remove the drive in question and install it into your test system, and it does not exhibit the problem. You should next replace the:

System's power supply
None of these
System's floppy drive device driver
Original IDE controller
Floppy drive ribbon cable

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