What are the most likely conditions for ESD?
Answer: B
Correct answer: Cold and dry
Dry air is an insulator, so charge accumulates on a body instead of leaking away, and cold air holds less moisture than warm. Cold and dry is therefore the worst combination - which is why static problems are worst in winter.
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14.4 modem should transmit _____ bits per second
Answer: A
Correct answer: 14,400-15,000
A modem's speed is quoted in bits per second, and 14.4 is shorthand for 14,400 bps - the k for kilo being dropped in speech.
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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 supplies power through an interruption; a surge protector deals with the opposite problem, and grounding with a third.
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When not in use, it is very important to keep 5 1/4 diskettes in _____.
Answer: A
Correct answer: Their protective sleeves
A 5¼ inch diskette has an exposed media window, so the sleeve is what keeps dust and fingerprints off the recording surface.
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UART is a type of serial chip. Its letters stand for:
Answer: B
Correct answer: universal asynchronous receiver/ transmitter
The UART converts between the parallel bytes of the bus and the serial bit stream of the line, adding and removing the start and stop bits.
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What type of FRU is a SCSI host adapter?
Answer: B
Correct answer: I/O card
A SCSI host adapter is an expansion card that moves data in both directions between the bus and its devices, so as a field replaceable unit it is classed as an I/O card.
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Which of these connects a computer to a network?
Answer: A
Correct answer: Network interface card
A network interface card connects a computer to a network, either by Ethernet cable or wirelessly. It is now built into almost every motherboard rather than being a separate card, though the name persists. Every NIC carries a MAC address, a 48-bit identifier assigned at manufacture and written as six pairs of hexadecimal digits. It identifies the hardware itself and does not change when the machine moves to a different network - unlike an IP address, which is assigned by the network and does change. The two work at different layers: the MAC address delivers a frame within a local network, and the IP address routes a packet between networks. The other cards named are expansion cards serving different purposes: a sound card handles audio input and output, a graphics card renders the display, and a TV tuner receives broadcast signals. All plug into PCI Express slots on the motherboard.
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What's the best way to prevent damaging your PC with static electricity?
Answer: D
Correct answer: wear an ESD wrist strap
A wrist strap holds the technician at the same potential as the equipment continuously, so no charge can build up. Touching a ground point works only until the next movement generates a fresh charge.
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On the 16-bit ISA bus, IRQ2 is elevated to which higher level interrupt?
Answer: A
Correct answer: 9
On the 16-bit ISA bus the second interrupt controller is cascaded through IRQ2, so a device requesting IRQ2 is actually serviced as IRQ9. The two are the same line seen from either side.
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What is your first action when windows reports that your hard drive is developing bad sectors?
Answer: D
Correct answer: run scandisk with the "thorough" option
A thorough scan tests the surface, marks the bad sectors so they are not used again, and moves any data out of them. That is done first because it costs nothing and may be all that is needed; replacement follows only if the count keeps growing.
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