CompTIA A+ 220-801 Practice Exam Question 19
To learn more about the DIR command, what would you enter at the command line? (Select the two best answers.)
A. DIR HELP
B. HELP DIR
C. DIR /?
D. DIR ?
Answers: A
Explanations
Use an uninterruptible power supply (UPS) to provide clean power and eliminate the voltage fluctuations—with the stipulation that the printer is not a laser printer! If it’s a laser printer, connect it to its own line conditioner. That is because of the load the laser printer puts on the device it plugs into. The question did not specify that this was a laser printer, and most friends of mine have inkjets. It’s not outside the realm of possibility, but it will be less likely, and that’s what you have to assume when taking the exam. As for the incorrect answers: a multimeter is what you would have used to figure out that the AC outlet was providing dirty power. A surge protector will not condition the voltage that is coming from the AC outlet; it will only protect against surges and spikes. A gas generator is a ridiculous option that would actually work in this scenario. However, it is not wise to keep a gas generator in the house; plus it will cost the friend more in money and maintenance as compared to a UPS.
To learn more about the DIR command, what would you enter at the command line? (Select the two best answers.)
A. DIR HELP
B. HELP DIR
C. DIR /?
D. DIR ?
Answers: A
Explanations
Use an uninterruptible power supply (UPS) to provide clean power and eliminate the voltage fluctuations—with the stipulation that the printer is not a laser printer! If it’s a laser printer, connect it to its own line conditioner. That is because of the load the laser printer puts on the device it plugs into. The question did not specify that this was a laser printer, and most friends of mine have inkjets. It’s not outside the realm of possibility, but it will be less likely, and that’s what you have to assume when taking the exam. As for the incorrect answers: a multimeter is what you would have used to figure out that the AC outlet was providing dirty power. A surge protector will not condition the voltage that is coming from the AC outlet; it will only protect against surges and spikes. A gas generator is a ridiculous option that would actually work in this scenario. However, it is not wise to keep a gas generator in the house; plus it will cost the friend more in money and maintenance as compared to a UPS.
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