The following process determines the amount of memory present, the date/ time, and which communications ports and display adapters are installed in a microcomputer?
Answer: B
Correct answer: Power on Self Test
The POST runs at power-up and inventories the machine: it counts memory, reads the date and time from CMOS, and detects the ports and display adapters present.
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Typically, how many Type III PC cards can you insert in a laptop?
Answer: A
Correct answer: 1
A Type III card is twice the thickness of a Type II, so it occupies both slots of the usual pair. A laptop with two Type II slots therefore takes one Type III card.
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What do you need to check serial and parallel port?
Answer: C
Correct answer: Loopback plug
A loopback plug joins a port's output pins to its input pins, so software can send data and check that the same data returns. That tests the port itself with nothing attached to it.
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When installing an internal modem, all of the following IRQ's can be used except?
Answer: C
Correct answer: 14
IRQ14 is taken by the primary IDE controller, which is present on every such system, so it is never available for a modem. IRQs 5 and 10 are commonly free.
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On a dot-matrix printer, regular lube maintenance should be followed, but this component should never be lubed:
Answer: C
Correct answer: Printhead
The printhead pins must run dry: oil collects paper dust and jams them, and they rely on airflow for cooling. The rails and bearings are the parts that do need lubrication.
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Capacitance is measured in units of:
Answer: C
Correct answer: farads
Capacitance is measured in farads, though practical capacitors are rated in microfarads and picofarads.
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What is the modem hang up command?
Answer: B
Correct answer: ATH
ATH hangs up - H for hook, as in on-hook. ATZ resets the modem instead.
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What does BIOS stand for?
Answer: A
Correct answer: Basic Input Output System
BIOS is the Basic Input Output System, firmware stored on a chip on the motherboard and the first code the processor executes when the machine is switched on. It performs three tasks in sequence. It runs the POST - the power-on self test - checking that the memory, processor and essential devices are present and working, and reporting failures by beep codes. It then initialises the hardware. Finally it locates a boot device and loads the bootstrap loader from it, handing control to the operating system. Its settings - boot order, date and time, hardware options - are held in CMOS memory, kept alive by a small battery on the board. A dead battery is why a computer forgets the date. On modern machines BIOS has been replaced by UEFI, which supports larger disks through GPT partitioning, faster booting and secure boot verification, though the older name is still used loosely for both.
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Which of the following items would require you to comply with EPA disposal guidelines?
Answer: D
Correct answer: Battery
Batteries contain heavy metals and must be disposed of under environmental regulations rather than thrown away. Keyboards, boards and supplies are ordinary electronic waste.
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A wrist grounding strap contains which of the following:
Answer: D
Correct answer: Resistor
The strap includes a resistor of about one megohm, high enough to bleed static charge away slowly and low enough to stop the wearer becoming a low-resistance path to earth if a live conductor is touched.
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