The DC voltage on most circuit boards is:
Answer: C
Correct answer: +5 volts
Logic circuits on expansion boards are supplied at +5 V; the ±12 V rails are for serial line drivers and motors.
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Which of the following FRUs would be considered both an input/output device?
Answer: B
Correct answer: SCSI host adapter
A SCSI host adapter both sends commands and data to its devices and receives data back, so it works in both directions. A video board only outputs, and the CPU is not a peripheral device at all.
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To view any currently running Terminate Stay Resident (TSR's) programs you could type:
Answer: B
Correct answer: MEM
MEM reports memory usage, and with the /C or /D switch it lists the resident programs occupying it. Memmaker optimises memory rather than reporting on it.
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Which step should you perform first before discharging a CRT?
Answer: D
Correct answer: Turn power off before removing power source
Nothing is touched until the monitor is switched off and unplugged. Even then the CRT holds a charge of tens of kilovolts and must be discharged deliberately before anything is removed.
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For a Macintosh to print successfully, the System Folder must contain:
Answer: D
Correct answer: A printer driver
The driver translates the application's output into the printer's own language, so nothing can print without it. Fonts and file sharing are unrelated to whether printing works at all.
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The terms "red book", "yellow book", and "orange book" refer to:
Answer: D
Correct answer: CD-ROM standards
The coloured books define the CD formats: Red Book audio, Yellow Book CD-ROM, Orange Book recordable, Green Book CD-i.
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You just installed a new IDE hard drive, but your system BIOS will not recognize the new drive, what should you check first.
Answer: B
Correct answer: jumpers on the hard drive
Two IDE drives on one cable must be set as master and slave, and a new drive left on the wrong setting is invisible to the BIOS. That is the commonest cause and the quickest to check.
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On a dot matrix printer, you should never lubricate which part?
Answer: B
Correct answer: printhead pins
The pins fire through a lubricant-free guide and are cooled by airflow; oil on them collects paper dust and jams them. The rails and bearings are the parts that do need lubrication.
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What resistance in ohms should be displayed when testing a speaker in a computer?
Answer: B
Correct answer: 16 Ohms
A small computer speaker is a coil of wire and reads its nominal impedance - typically 16 ohms - on a resistance range. A reading of zero would mean a short and an infinite reading an open coil.
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Which of these is a secondary storage device?
Answer: B
Correct answer: Solid-state drive
A solid-state drive is secondary storage: non-volatile, large, and not directly addressable by the processor - its contents must be copied into main memory before they can be used. The other three are all primary storage, directly accessible by the CPU. Registers sit inside the processor, cache sits beside it, and RAM is the main memory. All three are volatile. The distinction is between what the processor can address directly and what it cannot. Secondary storage includes hard disks, SSDs, USB flash drives, memory cards and optical discs; tertiary storage covers tape and archival media, slower still. An SSD differs from a hard disk in having no moving parts: it stores data in flash memory rather than on spinning magnetic platters, so it is far faster at random access, silent, and resistant to shock. Its limitation is a finite number of write cycles per cell, which wear-levelling algorithms spread across the drive.
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