12.3.8 Practice Questions

You want to use hibernation on your Windows notebook. What does it need to have for this to work?

> Enough free hard disk space Explanation: Hibernation saves everything in RAM to the hard drive. You need at least as much free disk space as you have RAM. Hibernation does not depend on the processor capabilities or the amount of RAM. A UPS is used to supply power to a device if the regular AC power is interrupted.

You have just purchased a used laptop, and you want to configure it to hibernate when you press the power button. You edit the Power Options settings and enable hibernation. Then you configure the power button to trigger hibernation. Everything works fine for several weeks. One day, when you press the power button, the laptop does not hibernate. Which of the following will BEST resolve this issue?

> Free up disk space. Explanation: The computer must have sufficient disk space to save the contents of RAM to a hibernation file on your internal hard disk. ACPI support is already enabled. Otherwise, you would not have been able to configure hibernation in the first place. Changing the power scheme or charging the battery has no effect on a device's ability to enter hibernation.

Which ACPI power state allows a system to start where it left off, but turns all other components off?

> Hibernate Explanation: Hibernate saves the RAM contents to a hibernation file. All other components are turned off. When the computer is restarted, the loader reads the hibernation file and jumps to the system's previous, pre-hibernation location. Working means the computer is running and is usable. Standby means that RAM is fully powered on, but screen and storages devices are powered down. This allows the system to quickly change to the Working state. Off means the system is completely turned off and is not consuming any power. No information from RAM is saved.

Which of the following BEST describes the purpose of the USB Selective Suspend feature?

> If a USB device is not in use, the USB Selective Suspend feature stops providing power to the port. Explanation: The best description provided is that a USB device stops providing power to a port when a USB device is not in use. The USB Selective Suspend feature automatically suspends power to a port. There is no interface that allows you to selectively suspend power to a port. The USB Selective Suspend feature does not include logging capabilities and does not work with ACPI to suspend power to attached USB devices when the system hibernates.

Which of the following is a disadvantage of using a Lithium Ion (Li-Ion) battery over a Nickel Metal Hydride (NiMH) battery?

> Li-Ion batteries have a shorter lifespan than NiMH batteries. Explanation: The basic disadvantage of using an Li-Ion battery over an NiMH battery is that the NiMH battery has a longer lifespan. Both Li-Ion and NiMH batteries do not develop a memory. Li-Ion batteries take up less physical space and weigh less than Nickel Cadmium or Nickel Metal Hydride batteries for comparable power output. Li-Ion batteries are not heat-sensitive.

Which of the following battery types offers the greatest storage capacity in the smallest amount of space?

> Lithium Ion (Li-Ion) Explanation: Lithium Ion (Li-Ion) batteries offer the greatest storage capacity in the smallest amount of space. Nickel Cadmium (NiCad) and Nickel Metal Hydride (NiMH) batteries take up more physical space than Lithium Ion batteries. Carbon batteries are small, but they have significantly less charge than Lithium Ion batteries. Carbon batteries are commonly used in remote controls, flashlights, toys, or transistor radios where the power drain is not too heavy.

While servicing your laptop, you notice that your Lithium Ion battery is swelling. What is the BEST action you can take to resolve the situation?

> Replace the battery. Explanation: Lithium Ion batteries suffer from swelling and eventually catching fire. Should the battery swell, stop using your device and replace the battery. By the time you check the battery again in a few days, it may have already swollen to the point that it catches fire. Cooling the battery down is not a viable solution. Once you place it back in the laptop, it will continue to heat and swell. Checking the voltage of the battery is not a viable solution. The battery will probably continue to swell and most likely catch fire.

From your Windows laptop, you have been working on a large project that has required you to open a lot of items (programs, files, etc.). It is time to leave the office and make the two-hour journey home. You will be working on this project a bit more when you arrive at home. Your computer's battery is failing and only has a very short life span (about one hour) before your computer loses power. When you arrive home and open the laptop lid, nothing happens. After plugging in your computer and powering it on, you find that all of your programs and files have been closed. To troubleshoot, you open Control Panel and navigate to the settings that control what your computer will do when the laptop lid is closed. Which of the following power settings MUST you choose to prevent the same problem in the future?

> When I close the lid: Hibernate Explanation: Hibernate saves the state of your computer to the hard disk and completely powers off your computer. When the devices resumes, the saved state is restored to RAM, and you can pick up where you left off. Sleep, Suspend, and Standby are all different terms that have been used for various versions of Windows. Regardless of which option is available for your Windows version, none will turn off your computer. Instead, they put the computer and all peripherals on a low-power consumption mode. Since your battery is not fully charged and can only power your computer for a short time, Sleep, Suspend, and Standby run the risk of the computer losing power, resulting in the closure of your programs and files. Shut down closes all files and programs and terminates all power.

You have purchased a refurbished Windows laptop and have just plugged the power adapter into the wall socket to begin charging the battery. However, after several hours of charging, the laptop does not turn on. What is the MOST likely cause of the power issue?

> You have been given the incorrect adapter. Explanation: The most likely cause of your power issue is that you were given the wrong adapter for the laptop. Most adapters are not interchangeable between laptops, as they require varying amounts of voltage and amperage. Even if the plug for the laptop is the correct size, the adapter may not be generating sufficient power to charge the laptop battery. A faulty operating system, memory, or hard drive could be the issue. However, because the laptop has been refurbished, it has probably gone through a series of tests to make sure that all three were operating correctly before shipping the laptop to you.

Match each battery type on the left with the battery characteristics on the right. (You can use each battery type more than once.)

Takes up the most physical space. > Nickel Cadmium (NiCad) Takes up the least physical space. > Lithium Ion (Li-Ion) The most expensive of Nickel batteries. > Nickel Metal Hydride (NiMH) Cannot be overcharged. > Lithium Ion (Li-Ion) Suffers from swelling and catching fire. >Lithium Ion (Li-Ion) Explanation: Nickel Cadmium (NiCad) batteries take up the most space, while Lithium Ion (Li-Ion) batteries take up the least space. The most expensive of the Nickel-based batteries is Nickel Metal Hydride (NiMH). Lithium Ion (Li-Ion) batteries cannot be overcharged, but they also suffer from swelling and catching fire.