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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A customer attached an external drive to his notebook computer but the computer is not recognizing it. What should be considered?
Answer: D
Correct answer: All of the above
All three are worth checking: a loose cable, a missing driver, and the order of connection - some external interfaces are recognised only if the device is present and powered before the machine boots.
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What is the jumper setting on a SCSI device to configure it to use the fourth SCSI id? Remember, SCSI ids start with zero.
Answer: C
Correct answer: 011
SCSI IDs count from zero, so the fourth is ID 3, and 3 in three bits is 011. The two low jumpers are shorted and the high one left open.
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Computers process data under the control of sets of instructions termed as
Answer: A
Correct answer: computer programs
A program is the set of instructions that directs the processing. Data is what is processed and a bus is what carries it.
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What is the size of the reserved memory area?
Answer: B
Correct answer: 384 kb
The first megabyte of a PC's address space is divided into 640 KB of conventional memory and the 384 KB above it reserved for video buffers, adapter ROMs and the system BIOS:
\[ 1024 - 640 = 384\ \text{KB} \]
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What voltage does a Pentium system use?
Answer: D
Correct answer: +3.3 volts
Later Pentium processors run their cores at 3.3 V rather than the 5 V of earlier chips, which is what allowed the clock speed to rise without the power dissipation becoming unmanageable.
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How many devices can be used on a single SCSI bus? Keep in mind that the SCSI host adapter counts as a device.
Answer: B
Correct answer: 8
A narrow SCSI bus has eight IDs, 0 to 7, and the host adapter takes one of them - conventionally 7. So eight devices in total, seven of them peripherals.
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How many DMA channels are in an AT-machine?
Answer: B
Correct answer: 8
An AT class machine has two cascaded DMA controllers giving eight channels, numbered 0 to 7. Channel 4 is consumed by the cascade, leaving seven for devices - which is why the figure 7 is often quoted as well.
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In laser technology, what happens during the transfer stage?
Answer: C
Correct answer: The image is transferred from the drum to the paper
At the transfer stage the paper is given a strong positive charge, which pulls the negatively charged toner off the drum onto the page. Fusing then melts it into the fibres.
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Resistance is measured in ohm.
Answer: A
Correct answer: True
Resistance is measured in ohms, named after Georg Ohm and written with the Greek capital omega.
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