CompTia A+ (Desktop) MCQ Quiz and Online Test

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#1. What is the proper voltage for a U.S. electrical outlet?

120 V

60 V

0 V

–120 V

#2. What voltages does an ATX12V P1 connector provide for the motherboard?

3.3 V, 5 V

3.3 V, 12 V

5 V, 12 V

3.3 V, 5 V, 12 V

#3. What sort of power connector do better video cards require?

Molex

Mini

PCIe

SATA

#4. Joachim ordered a new power supply but was surprised when it arrived because it had an extra 4-wire connector. What is that connector?

P2 connector for plugging in auxiliary components

P3 connector for plugging in case fans

P4 connector for plugging into modern motherboards

Aux connector for plugging into a secondary power supply

#5. What should you keep in mind when testing DC connectors?

DC has polarity. The red lead should always touch the hot wire; the black lead should touch a ground wire.

DC has polarity. The red lead should always touch the ground wire; the black lead should always touch the hot wire.

DC has no polarity, so you can touch the red lead to either hot or ground.

DC has no polarity, so you can touch the black lead to either hot or neutral but not ground.

#6. What voltages should the two hot wires on a Molex connector read?

Red = 3.3 V; Yellow = 5 V

Red = 5 V; Yellow = 12 V

Red = 12 V; Yellow = 5 V

Red = 5 V; Yellow = 3.3 V

#7. Why is it a good idea to ensure that the slot covers on your computer case are all covered?

To maintain good airflow inside your case.

To help keep dust and smoke out of your case.

Both A and B are correct reasons.

Trick question! Leaving a slot uncovered doesn’t hurt anything.

#8. A PC’s power supply provides DC power in what standard configuration?

Two primary voltage rails, 12 volts and 5 volts, and an auxiliary 3.3-volt connector

Three primary voltage rails, one each for 12-volt, 5-volt, and 3.3- volt connectors

One primary DC voltage rail for 12-volt, 5-volt, and 3.3-volt connectors

One voltage rail with a 12-volt connector for the motherboard, a second voltage rail with a 12-volt connector for the CPU, and a third voltage rail for the 5-volt and 3.3-volt connectors

#9. What feature of ATX systems prevents a user from turning off a system before the operating system has been shut down?

Motherboard power connector

CMOS setup

Sleep mode

Soft power

#10. How many pins does a SATA power connector have?

CHECK ANSWER