What beep codes could indicate a system board or power supply failure?
Answer: D
Correct answer: All of the above
A steady short beep, no beep at all, and one long continuous tone all point to the system board or the power supply - failures early enough that the BIOS cannot report anything more specific.
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What does the acronym RTS represent?
Answer: C
Correct answer: Request to send
RTS is one of the RS-232 handshaking lines: the sender raises it to ask permission to transmit, and the receiver answers with CTS, clear to send.
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A modem could be attached to which port?
Answer: A
Correct answer: ASYNC port
A modem is an asynchronous serial device, so it attaches to the asynchronous serial port - internally, to a serial port on the card itself. The parallel port is for printers.
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What can you use to ensure power is not interrupted, resulting in corrupted data?
Answer: A
Correct answer: UPS
Only a UPS keeps the machine running through an interruption, so that data in memory is written out and the system shut down properly. A surge protector guards against excess voltage but supplies nothing when the mains fails.
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A 25-pin female connector on the back of your computer will typically be:
Answer: B
Correct answer: A parallel port
A 25-pin female connector on the back of a PC is the parallel port. The serial ports are male, with 9 or 25 pins, which is how the two are told apart.
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When connecting two internal SCSI hard disks to a computer, where do you connect the second hard drive?
Answer: A
Correct answer: Any open SCSI port on the computer
SCSI devices hang off one bus in a chain, so the second drive attaches to any free connector on that bus and is given its own ID. It does not connect to the first drive's ports, and serial and parallel ports are unrelated.
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ESD damage can be caused by:
Answer: A
Correct answer: Placing an IC in a non-conductive plastic bag
An ordinary plastic bag is an insulator and generates charge as the component moves inside it - which is why antistatic bags are made conductive. A grounded mat and a touched chassis both drain charge away.
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What device prevents power interruptions, resulting in corrupted data?
Answer: A
Correct answer: Battery back-up unit
Only a UPS keeps the machine running through a power interruption, so that work in memory is written out and the system shut down properly. A surge protector guards against excess voltage but supplies nothing when the mains fails.
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What device protects against line deficiencies?
Answer: B
Correct answer: UPS
Line deficiencies are shortfalls - sags, brownouts and outages - and only a UPS supplies power to make them up. A surge protector deals with the opposite problem, excess voltage.
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COM 4 uses which I/O port?
Answer: D
Correct answer: 2E8H
The standard serial addresses are COM1 at 3F8, COM2 at 2F8, COM3 at 3E8 and COM4 at 2E8.
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