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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When connecting a ribbon cable to a connector, how do you know which direction to plug it in?
Answer: B
Correct answer: The colored line in the cable goes to pin #1
The stripe along one edge of a ribbon cable marks the conductor carrying pin 1, and pin 1 on the board is marked with a square pad, a dot or a number. Aligning the two is the whole of the rule.
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What is the first step in diagnosing a completely dead computer at the client site that was working the day before.
Answer: C
Correct answer: check the AC outlet
A machine that worked yesterday and is now completely dead most often has no power reaching it. The outlet is checked first because it takes seconds, needs no tools and rules out the commonest cause.
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What specification covers PC hard cards?
Answer: C
Correct answer: PCMCIA
PCMCIA defines the credit-card sized expansion cards used in laptops, later renamed PC Card. SCSI and ISA are buses of a different kind and MFM an old disk encoding.
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Which common bus specification provides the fastest data transfer rate?
Answer: C
Correct answer: PCI
PCI runs at 33 MHz and 32 bits, giving about 133 MB/s, against the VL bus's dependence on the processor bus and ISA's 8 MHz. It is also processor-independent, which is why it outlasted VL.
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Modems use transmission.
Answer: B
Correct answer: asynchronous
A modem sends each character framed by start and stop bits, with no clock shared between the two ends - that is asynchronous transmission. Synchronous transmission requires a common clock.
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A 6xx indicates a problem with the:
Answer: A
Correct answer: floppy drive
In the POST numbering, 6xx is the floppy drive. 1xx is the system board, 3xx the keyboard and 17xx the hard disk.
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A sound card typically uses which IRQ?
Answer: B
Correct answer: 5
A sound card conventionally takes IRQ5, which is free on most systems because LPT2 is rarely fitted. IRQ6 belongs to the floppy and IRQ1 to the keyboard.
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During preventative maintenance on a dot matrix printer, do NOT lubricate:
Answer: C
Correct answer: Print head pins
The pins must run dry: oil on them collects paper dust and jams them, and they are cooled by airflow that a lubricant would impede. The platen, pulley and bearings are the parts that do need lubrication.
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You see the message "invalid media device" after installing a new hard drive. What do you do next?
Answer: A
Correct answer: Format
Invalid media means the partition exists but carries no file system, which is exactly the state after partitioning. The next step is therefore to format it.
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