IT Essentials 8.0 Module 1.4.1.2 Introduction to Personal Computer Hardware Quiz answers
1. Which three devices are considered output devices? (Choose three.)
- fingerprint scanner
- headphones
- keyboard
- monitor
- mouse
- printer
Explanation: Headphones, monitors, printers, speakers,scanners, fax machines, and projectors are all considered output devices. Fingerprint scanners, keyboards, and mice are all considered input devices.
2. A network administrator currently has three servers and needs to add a fourth, but does not have enough room for an additional monitor and keyboard. Which device allows the administrator to connect all the servers to a single monitor and keyboard?
- touch screen monitor
- PS/2 hub
- USB switch
- KVM switch
- UPS
Explanation: A keyboard, video, mouse (KVM) switch is a hardware device that can be used to control more than one computer using a single keyboard, monitor, and mouse. KVM switches provide cost-efficient access to multiple servers using a single keyboard, monitor, and mouse.
3. Which action can reduce the risk of ESD damage when computer equipment is being worked on?
- working on a grounded antistatic mat
- lowering the humidity level in the work area
- moving cordless phones away from the work area
- keeping the computer plugged into a surge protector
Explanation: To help prevent ESD damage, use grounded mats on work benches and grounded floor mats in work areas. You can also use an antistatic wrist strap to prevent ESD strikes except when working inside power supplies or CRT monitors.
4. Which type of input device can identify users based on their voice?
- digitizer
- KVM switch
- biometric identification device
- scanner
Explanation: A biometric identification device is an input device that can identify a user based on a unique physical feature such as a fingerprint or voice. A digitizer is used with a stylus pen to design and create images or blueprints. A scanner is used to digitize an image or document. A KVM switch can connect multiple computers to one keyboard, monitor, and mouse.
5. How are the internal components of a computer protected against ESD?
- by unplugging the computer after use
- by grounding the internal components via attachment to the case
- by using computer cases made out of plastic or aluminum
- by using multiple fans to move warm air through the case
Explanation: Electrostatic discharge (ESD) can occur when there is a buildup of an electric charge (static electricity) on a surface which comes into contact with another. This can be mitigated by grounding the internal components of the computer to the case.
6. A technician wants to replace a failing power supply on a high-end gaming computer. Which form factor should the technician be looking for?
- AT
- ATX
- ATX12V
- EPS12V
Explanation: High-end desktop and gaming computers use the EPS12V power supply form factor. It is also used in servers.
7. Refer to the exhibit. How is the connector used in a PC?
1.4.1.2 Introduction to Personal Computer Hardware Quiz Q7
- to connect legacy floppy drives
- to connect optical drives
- to connect disk drives
- to supply power to various internal components
Explanation: This connector is called a 6/8-pin PCIe power connector and is used to supply power to various components of the computer.
8. Which expansion slot is used by an NVMe compliant device?
- PCI
- PCIe
- USB-C
- SATA
Explanation: The Non-Volatile Memory Express (NVMe) specification provides a standard interface between compliant SSD drive, the PCIe bus, and operating systems.
9. Which disk drive type contains a magnetic HDD with onboard flash memory serving as a non-volatile cache?
- SCSI
- SSD
- NVMe
- SSHD
Explanation: The Solid State Hybrid Drives (SSHD) combine a magnetic HDD with onboard flash memory serving as a non-volatile cache but cost less then SSD.
10. Which port allows for the transmission of high definition video using the DisplayPort protocol?
- Thunderbolt
- DVI
- VGA
- RCA
Explanation: The Thunderbolt port allows for transmission of high definition video using the DisplayPort protocol.
11. Refer to the exhibit. What type of connecter is displayed?
1.4.1.2 Introduction to Personal Computer Hardware Quiz Q11
- DVI to HDMI adapter
- HDMI to VGA converter
- Molex to SATA adapter
- USB to PS/2 adapter
Explanation: The displayed item is a HDMI to VGA converter that is used to convert digital signals to analog signals.
12. Which statement describes Augmented Reality (AR) technology?
- It always requires a headset.
- It superimposes images and audio over the real world in real time.
- The headset closes off any ambient light to users.
- It does not provide users with immediate access to information about their real surroundings.
Explanation: Augmented Reality (AR) superimposes images and audio over the real world in real time. It does allow ambient light and does not require headsets all the time.
13. Which two PC components communicate with the CPU through the Southbridge chipset? (Choose two.)
- RAM
- hard drive
- 64-bit gigabit Ethernet adapter
- video card
Explanation: The Northbridge chipset allows the fastest components such as the RAM and the video card to interface with the CPU at the front side bus speed. All other components such as the BIOS, hard drive and the expansion slots communicate with the CPU via the Southbridge chipset.
14. Which motherboard form factor has the smallest footprint for use in thin client devices?
- ATX
- Micro-ATX
- Mini-ATX
- ITX
Explanation: The Mini-ATX motherboard form factor is the smallest form factor (17cm X 17cm or 6.7 inches X 6.7 inches) and is used in thin clients and set-top boxes.
15. What is the maximum storage capacity of a single DDR5 DIMM stick?
- 64 GB
- 128 GB
- 256 GB
- 32 GB
Explanation: DDR5 brings some incremental improvements over DDR4. Unlike the maximum 32GB capacity on a DDR4 DIMM stick, DDR5 raises this to a potential 128GB per module.