A capacitor is measured in which of the following units?
Answer: C
Correct answer: Farads
Capacitance is measured in farads. Volts measure potential difference and ohms resistance.
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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 does the acronym USB stand for?
Answer: B
Correct answer: Universal Serial Bus
USB is the Universal Serial Bus, introduced in 1996 to replace the profusion of incompatible ports that preceded it - serial, parallel, PS/2 and game ports. Its distinguishing features are hot swapping, so devices can be connected and removed without restarting; plug and play, so drivers are matched automatically; and the ability to supply power as well as data, which is what allows a device to charge from a computer. Up to 127 devices can be attached through hubs. The versions raised speed by large steps: USB 1.1 at 12 Mbps, 2.0 at 480 Mbps, 3.0 at 5 Gbps, and later revisions further still. The connectors are a separate matter from the versions, which is a common confusion. Type-A is the familiar rectangular plug, Type-B the square one on printers, and Type-C the reversible modern connector that can carry USB, DisplayPort and up to 100 watts of power over one cable.
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What would you ask to determine if the display is working?
Answer: D
Correct answer: All of the above
Each of the three tells you something: a cursor or any activity shows the display is working, the beep shows the machine got through its self test, and static on the glass shows the tube is at least powered.
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Your CD-ROM audio cable connects to the:
Answer: B
Correct answer: sound card (or motherboard if sound is integrated with it)
The thin analogue cable carries audio from the drive to the sound card, so that a music CD can be played without the data passing through the bus.
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In the Binary numbering system, a (1) represents a jumper being shorted and a (0) represents a jumper being open. On a three-bit jumper block on a SCSI drive, how would an ID of logical 3 be set?
Answer: C
Correct answer: 011
Three jumpers give three bits, and 3 in binary is 011:
\[ 0\times 4 + 1\times 2 + 1\times 1 = 3 \]
So the two low jumpers are shorted and the high one left open.
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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?
Answer: A
Correct answer: IRQ
A sound card and a parallel port device that both want the same interrupt will each work alone and lock the machine when used together. That signature - two devices fine separately, fatal together - is an IRQ conflict.
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You are testing the resistance in Ohms of a fuse on a 15K amp system. If the fuse is good, the meter should read?
Answer: A
Correct answer: 0.0
A good fuse is a piece of wire, so its resistance is effectively zero and the meter reads 0.0. A blown fuse reads as an open circuit.
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Type one PC cards:
Answer: C
Correct answer: are the thinnest of the PC cards
PC Cards come in three thicknesses: Type I at 3.3 mm for memory, Type II at 5 mm for modems and network cards, and Type III at 10.5 mm for miniature hard disks.
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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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