Computer maintenance part 1
You are trying to troubleshoot a desktop power supply issue using a voltmeter. Which of the following options are the MOST common voltages produced by the power supply? (Select TWO).
-+/- 5 v -+/- 12 v
Assuming the same operating frequency, what are the advantages of DDR3 over DDR2? (Select TWO.)
-DDR3 uses less power than DDR2. -DDR3 doubles the data transfer rate of DDR2.
Assuming the same operating frequency, what advantages does DDR4 have over DDR3? (Select TWO.)
-DDR4 doubles the data transfer rate of DDR3. -DDR4 uses less power than DDR3.
An employee submitted a support ticket stating that her computer will not turn on. Which of the following troubleshooting steps should you take first? (Select TWO).
-Make sure the power cord is plugged into the wall. -Make sure the surge protector is turned on.
You need to replace the power supply in your home desktop computer. As you choose the replacement power supply, which of the following specifications are the MOST likely to affect your choice? (Select THREE).
-Output wattage -Form factor -Processor connector
Which of the following statements are true regarding power supply wattage? (Select TWO).
-The wattage requirement for each individual circuit uses formula W = V x A. -The watt rating indicates how much power can be supplied to various devices.
You need to replace the power supply in your home desktop computer. Which of the following specifications are the most likely to affect your power supply choice? (Select THREE).
-Type and number of connectors -Output wattage -Form factor
Which of the following connectors are part of the system case and connect to header pins on the motherboard? (Select two.)
-power swtich -HDD LED activity
1- Maintains an accurate system time and date, even when the power is off. 2-Allows additional features and capabilities to be added to the motherboard. 3-Houses the PCI bus controllers and communicates with the super I/O controller. 4-Contains firmware that is used to configure motherboard settings and initialize devices. 5-Controls communication between the CPU, memory, and high-speed graphics bus. 6-Stores custom configuration settings made by the user.
1-CMOS battery 2-Expansion slots 3-Southbridge 4-Flash memory 5-Northbridge 6-Non-volatile BIOS memory
What is the approximate bus speed of DDR2 memory rated at PC2-5300?
333 MHz
Which of the following BEST describes the theoretical capacity of a DDR4 standard system memory module?
512 GB
You have a laptop with a dual-core processor that has the following characteristics: 1024 KB L2 cache 125 Watts 45nm process size You want to upgrade the processor to one that uses less power. Which of the following characteristics would MOST likely identify a processor that uses less power?
90 watts
Mini-ITX Tower
A
A computer's power supply converts mains AC to low-voltage regulated DC power for the internal components of a computer. You are building a new computer. You are deciding which type of power supply to install. Which of the following definitions BEST describes a valid type of power supply?
A dual-rail power supply provides separate rails (PCB traces) used to balance the power load between multiple circuits, which prevents any one circuit from becoming overloaded.
You need to purchase a case that meets the following criteria: Compatible with most form factors At least two external and internal bays Good balance of size and space Which case type should you purchase?
ATX mid-tower
Micro-ATX Slim Tower
B
Micro-ATX Tower
C
ATX MId-Tower
D
Your motherboard has sockets for 184-pin DIMM RAM. Which type of RAM should you install?
DDR
Which of the following memory ratings identifies the fastest memory?
DDR3-1600
Which memory rating identifies the fastest memory?
DDR3-2000
Which of the following are terms used to identify memory modules?
DIMM
ATX Full-Tower
E
Which function does a motherboard's chipset perform?
Facilitates communication between the processor, memory, and peripheral devices.
Which of the following BEST describes the chipset?
Facilitates communication between the processor, memory, and peripheral devices.
Which of the following objects is installed between the back side of the system case and the motherboard's ports?
I/O sheild
Your company relocated you from the United States to their United Kingdom office in London. You brought your personal computer with you and are in the process of setting it up. Your computer was previously configured to receive 115 VAC, but the electricity in London uses 230 VAC. Which of the following would allow your computer to run on 230 VAC?
Inspect the power supply unit for a manual voltage switch and move it to 230 VAC otherwise no action is necessary.
You have just received an order of various system components from an order you placed several weeks ago. One of the components is labeled as SODIMM memory. For which of the following was this memory MOST likely purchased?
Laptop computers
Which of the following is an advantage of purchasing a motherboard with integrated graphics and audio?
Lower overall system cost
You want to build a computer with a smaller case that is designed to be placed on desktops in a flat or upright position. Which case type should you select?
Micro-ATX slim tower
Which of the following motherboard form factors BEST allows for low-consumption power supplies?
Mini-ITX
Which of the following form factors does not have expansion slots on the motherboard, but instead uses a riser card for expansion cards?
NLX
You decided to upgrade your PC with a faster processor. To do this, you ordered a new motherboard over the Internet that supports the processor you want to use. When it arrives, you discover that the motherboard uses the Micro-ATX form factor. Your current case is an ATX mid-tower with a standard ATX motherboard inside. What steps must be taken for the Micro-ATX motherboard to work in the ATX case?
No additional steps are necessary, the Micro-ATX motherboard can be installed in the ATX case.
You are testing the power supply in a PC system by measuring the voltage available on the 4-pin Molex connector. The voltage on the red wire is +5.1 volts. What should you do?
Nothing. The power supply is working normally.
Which expansion slot is best for high-end dedicated video cards?
PCIe x16
You have a computer system with a dual-core processor. You would like to upgrade to a quad-core processor, but you don't want to replace the motherboard. Which of the following steps SHOULD you perform first?
Read the motherboard documentation to identify which processors are supported.
You are servicing a client's computer that has been randomly restarting. You decide to test the power supply using a multimeter. You connect the positive lead to the yellow wire on one of the Molex connectors.Which of the following BEST describes the action you should take based on the multimeter reading shown below?
Replace the power supply because it is failing.
You are testing the power supply in a PC system by measuring the voltage available on the 4-pin Molex connector. The voltage on the yellow wire is +10.1 volts. What should you do?
Replace the power supply.
After arriving at work, you turn on your computer to begin your day. Instantly, you see smoke and smell a strange odor coming from the computer. Which of the following would be the MOST important action to take?
Shut off the system immediately.
You are in the process of installing a motherboard in a system case. Which of the following objects should you place between the motherboard and the system case?
Standoffs
You have just finished replacing the motherboard in your friend Ethan's computer with the same type of motherboard it originally had. You tested the motherboard by powering it on and verifying that the operating system started, and his applications were working. Now Ethan is complaining that his computer no longer recognizes his external hard drive. Which of the following is MOST likely causing the external hard drive not to function?
The USB front panel connector was not properly connected.
When you try to boot your computer, it hangs after POST. When you access the UEFI setup program, you see that the date is several years behind, and the time is set to 12:01 a.m. Which of the following is the MOST likely cause of this behavior?
The motherboard battery has failed.
A laptop that you previously purchased was shipped with SODIMM memory to accommodate the laptop's form factor. You would now like to upgrade the memory. Which of the following is an upgrade to the SODIMM standard?
UniDIMM
You have a desktop computer that uses a 250-watt power supply. You recently added a four-disk RAID 10 array to the system, and now it spontaneously shuts down. Which of the following would MOST likely rectify this issue?
Upgrade to a power supply that provides more watts.
You work as the IT administrator for a small corporate network. One of the company employees needs to add an additional PCI card to the motherboard in a small form factor case. When you open the computer, you see that the card purchased will not fit due to the card's height. Which of the following is the BEST method for using the newly purchased card?
Use a riser card to allow the new card to be installed parallel to the motherboard.
You are building a new computer from both new and used parts. The video card is a PCIe video card that requires an 8-pin power connector. However, your power supply doesn't have an 8-pin PCIe power connector. Which solution would be the least expensive option for your system?
Use an adapter cable to connect two 4-pin Molex connectors to the 8-pin PCIe connector.
A customer needs to use several applications. Currently, the computer cannot keep all the necessary applications open at the same time. Which of the following components should you consider upgrading?
memory
A user calls to complain that her computer is behaving erratically. Some days it functions correctly, and other days, it crashes frequently. Sometimes, the system won't boot at all. You open the system case and notice the following: Two of the mounting screws are missing from the system hard disk drive. The system uses memory modules from several different manufacturers with mismatched capacities. Several capacitors on the motherboard are bulging and have a brown liquid oozing from them. The chassis fan on the front of the case is oriented to blow air into the system. What should you do?
replace the motherboard
You have a desktop computer that you want to upgrade. You add several internal components and external components. You realize that you need to ensure that your power supply can support all of the new devices. Which of the following power supply ratings BEST describes the rating used to determine this?
watt rating
