View Full CompTIA A+ 220-1101 Exam Dumps and Practice Test Dumps

 

Question 361.

Which connector commonly carries digital audio from a computer to a receiver?

1. TOSLINK
2. RJ11
3. DE-9
4. F-type

Correct Answer: 1

Explanation:

TOSLINK is an optical connector commonly used for transmitting digital audio signals. It uses fiber-optic light rather than electrical signaling, which helps avoid electromagnetic interference. Computers, sound cards, televisions, and home theater receivers may provide TOSLINK ports for digital audio connections. RJ11 is commonly associated with telephone wiring, DE-9 is used for certain serial connections, and F-type connectors are widely used with coaxial cable. TOSLINK can carry formats such as PCM stereo and certain compressed multichannel audio formats, depending on the equipment and implementation.

Question 362.

Which laptop component allows storage expansion through a compact card slot?

1. DDR5 SO-DIMM
2. PCIe x16 card
3. M.2 SSD
4. ATX power supply

Correct Answer: 3

Explanation:

An M.2 SSD provides compact storage that is commonly installed directly into a laptop motherboard. Depending on the slot and drive type, an M.2 device may use SATA or PCIe/NVMe communication. Its small form factor makes it particularly suitable for laptops and other space-constrained systems. DDR5 SO-DIMMs provide memory rather than storage, PCIe x16 cards are generally intended for larger desktop expansion devices, and ATX power supplies are desktop power components. When installing an M.2 SSD, compatibility with the laptop’s supported interface and physical keying should be verified.

Question 363.

Which display technology uses organic compounds that emit their own light?

1. LCD
2. DLP
3. Plasma
4. OLED

Correct Answer: 4

Explanation:

OLED stands for Organic Light-Emitting Diode and uses organic compounds that emit light when electrically stimulated. Unlike conventional LCD panels, OLED pixels can generate their own illumination, eliminating the need for a separate backlight. This allows OLED displays to produce very deep blacks because individual pixels can be turned off. LCD displays use a backlight, DLP uses micromirrors for projection, and plasma displays use electrically excited gas cells. OLED technology is found in many modern smartphones, televisions, laptops, and high-end monitors where contrast and thin designs are important.

Question 364.

Which protocol is commonly used to automatically assign IP addresses to network clients?

1. FTP
2. DHCP
3. IMAP
4. SNMP

Correct Answer: 2

Explanation:

DHCP, or Dynamic Host Configuration Protocol, automatically provides network configuration information to clients. A DHCP server can assign an IP address along with settings such as the subnet mask, default gateway, and DNS server addresses. This reduces manual configuration and helps prevent address conflicts. FTP is designed for file transfers, IMAP is used for retrieving and managing email messages, and SNMP is commonly used for network monitoring and management. DHCP is especially useful on networks with many devices because administrators can centrally manage address allocation.

Question 365.

Which component converts AC power into regulated DC power for computer hardware?

1. PSU
2. Inverter
3. Transformer
4. UPS battery

Correct Answer: 1

Explanation:

A computer power supply unit, or PSU, converts incoming AC electrical power into regulated DC voltages required by internal components. Modern PSUs provide several voltage rails and distribute power through connectors designed for the motherboard, processor, storage devices, graphics hardware, and other peripherals. A transformer can change voltage levels but does not by itself perform the complete regulated conversion required by a computer. An inverter generally converts DC to AC, while a UPS battery stores energy for backup operation. Proper PSU selection requires consideration of connector compatibility and total power requirements.

Question 366.

Which storage technology retains data without requiring continuous electrical power?

1. Volatile RAM
2. CPU cache
3. SRAM buffer
4. Flash memory

Correct Answer: 4

Explanation:

Flash memory is nonvolatile storage, meaning it retains stored information when electrical power is removed. It is widely used in SSDs, USB flash drives, memory cards, and embedded devices. RAM and most CPU cache are volatile and lose their contents when power is removed. SRAM is also volatile despite being faster and more specialized than conventional DRAM. Flash memory stores information using semiconductor cells and contains no mechanical moving parts. Its nonvolatile characteristics make it suitable for persistent storage in both portable and fixed computing devices.

Question 367.

Which interface is commonly used to connect a desktop motherboard to a modern graphics card?

1. PCIe x16
2. SATA
3. M.2 SATA
4. USB 2.0

Correct Answer: 1

Explanation:

PCIe x16 is the standard expansion interface commonly used for dedicated desktop graphics cards. The x16 designation indicates a slot capable of providing a larger number of PCIe lanes, allowing substantial data transfer between the graphics processor and the system. SATA is primarily used for storage devices, while M.2 SATA refers to certain compact storage configurations. USB 2.0 is designed for external peripherals and provides much less bandwidth than a dedicated graphics expansion interface. The motherboard must have a compatible PCIe slot and sufficient power for the selected graphics card.

Question 368.

Which wireless security method uses AES encryption with WPA2-Personal networks?

1. TKIP
2. CCMP
3. WEP
4. Open authentication

Correct Answer: 2

Explanation:

CCMP is the encryption protocol commonly associated with WPA2 and uses AES for strong wireless data protection. WPA2-Personal typically uses a pre-shared key for authentication, while CCMP provides confidentiality and integrity for transmitted wireless frames. TKIP was introduced for older WPA implementations and is considered less modern. WEP is an obsolete wireless security mechanism with significant weaknesses, while an open network does not provide encryption. When configuring a compatible wireless network, WPA2 with AES/CCMP provides substantially stronger protection than legacy WEP or TKIP-based configurations.

Question 369.

Which device allows multiple computers to share a single Ethernet connection?

1. Network switch
2. Patch panel
3. Punchdown block
4. Keystone jack

Correct Answer: 1

Explanation:

A network switch allows multiple Ethernet-connected devices to communicate over the same local network infrastructure. Each device connects to an individual switch port, and the switch forwards Ethernet frames toward the appropriate destination. A patch panel provides a convenient termination and organization point for network cabling but does not actively forward traffic. Punchdown blocks are used to terminate certain wiring systems, while keystone jacks provide modular connection points. A switch therefore performs the active networking function required when several wired computers need connectivity through shared network infrastructure.

Question 370.

Which connector is typically used for connecting an internal 2.5-inch SATA SSD to a motherboard?

1. RJ45
2. SATA data connector
3. HDMI
4. USB Type-A

Correct Answer: 2

Explanation:

A SATA data connector connects an internal SATA storage device to the motherboard’s SATA controller. Many 2.5-inch SATA SSDs use this interface for communication with the system. A separate SATA power connection supplies electrical power to the drive. RJ45 is commonly used for Ethernet networking, HDMI carries digital audio and video, and USB Type-A is an external peripheral connector. When installing a 2.5-inch SATA SSD, both the data and power connections must be properly attached, unless a particular enclosure or adapter provides them through another interface.

Question 371.

Which memory type is commonly used as the main system memory in modern desktop computers?

1. GDDR6
2. HBM
3. DDR4
4. VRAM

Correct Answer: 3

Explanation:

DDR4 is a type of system memory used in many desktop and laptop computers. It provides the CPU with relatively fast working memory for operating-system processes and applications. GDDR6 is commonly associated with graphics memory, while HBM is a high-bandwidth memory technology used in specialized processors and graphics products. VRAM is a general term for memory used by graphics hardware rather than the primary system RAM. The motherboard and processor determine which memory generation and module specifications a system supports, so memory should always be matched to the platform’s requirements.

Question 372.

Which connector is designed to carry both digital video and digital audio over one cable?

1. PS/2
2. DB-9
3. HDMI
4. RJ11

Correct Answer: 3

Explanation:

HDMI is designed to transmit digital video and digital audio through a single cable. It is widely used with computers, monitors, televisions, projectors, and home theater equipment. This reduces cable requirements when compared with interfaces that carry video only. PS/2 is associated with legacy keyboards and mice, DB-9 connectors have been used for serial and other interfaces, and RJ11 is commonly associated with telephone connections. HDMI versions differ in supported bandwidth and capabilities, so the cable and connected devices should support the required resolution, refresh rate, and audio features.

Question 373.

Which motherboard feature protects against electrostatic discharge during component installation?

1. CMOS reset
2. ESD protection
3. CPU boost
4. Memory overclocking

Correct Answer: 2

Explanation:

ESD protection practices help prevent electrostatic discharge from damaging sensitive computer components. Technicians commonly use an antistatic wrist strap connected to an appropriate grounding point and work on suitable surfaces when handling memory, processors, expansion cards, and other hardware. CMOS reset procedures are used to restore firmware settings, while CPU boost and memory overclocking are performance-related functions. Static electricity may damage electronic components even when no visible spark occurs. Proper grounding and careful handling therefore form an important part of safe PC installation and maintenance procedures.

Question 374.

Which cable category supports Gigabit Ethernet over standard twisted-pair wiring?

1. Cat 5e
2. RG-6
3. Twinax
4. Fiber OM1

Correct Answer: 1

Explanation:

Cat 5e twisted-pair cabling supports Gigabit Ethernet under appropriate installation conditions. It is widely deployed in residential and business Ethernet networks and commonly uses RJ45-style connectors. RG-6 is coaxial cable often used for broadband and video applications. Twinax is used in certain high-speed networking and data-center environments, while OM1 is a multimode fiber specification. When deploying Ethernet, cable category, connector quality, termination, distance, and environmental conditions can affect achievable performance. Cat 5e remains a common option for 1000BASE-T Gigabit Ethernet installations.

Question 375.

Which laptop feature allows the screen brightness to adjust automatically based on ambient light?

1. Touchpad controller
2. Accelerometer
3. Ambient light sensor
4. Digitizer

Correct Answer: 3

Explanation:

An ambient light sensor measures surrounding light levels and can allow a laptop or mobile device to automatically adjust display brightness. This can improve viewing comfort and potentially reduce unnecessary power consumption. An accelerometer detects changes in movement or orientation, a digitizer detects stylus or touch input on supported displays, and a touchpad controller manages pointing-device input. Ambient light sensors are often integrated into the display assembly or nearby bezel area. Operating-system settings and firmware determine whether automatic brightness adjustment is enabled and how aggressively the brightness changes.

Question 376.

Which connector is commonly used for a legacy PC keyboard or mouse?

1. RJ45
2. PS/2
3. USB-C
4. DisplayPort

Correct Answer: 2

Explanation:

PS/2 is a legacy interface commonly used for keyboards and mice on older personal computers. The connector is small and round and traditionally uses separate ports for the keyboard and mouse. USB has largely replaced PS/2 for modern peripheral connections because it provides broader compatibility and additional functionality. RJ45 is associated with Ethernet networking, USB-C is a modern multifunction peripheral connector, and DisplayPort is designed primarily for digital display connectivity. Some modern motherboards still include PS/2 ports to support legacy peripherals or specialized keyboard and mouse use cases.

Question 377.

Which storage medium uses magnetic platters to record data?

1. SSD
2. Flash drive
3. Hard disk drive
4. Optical disc

Correct Answer: 3

Explanation:

A hard disk drive, or HDD, stores information magnetically on rotating platters. A mechanical actuator moves read/write heads across the platter surfaces to access stored data. SSDs and USB flash drives generally use flash memory rather than rotating magnetic media. Optical discs store information using optical technology and laser-based reading mechanisms. HDDs can provide substantial storage capacity at relatively low cost, but their mechanical construction makes them more susceptible to physical shock than solid-state storage. Proper handling and mounting help reduce the risk of mechanical damage.

Question 378.

Which technology enables a computer to boot from a network-based installation server?

1. PXE
2. Bluetooth
3. NFC
4. Wi-Fi Direct

Correct Answer: 1

Explanation:

PXE, or Preboot Execution Environment, allows a compatible computer to start the boot process using network resources rather than relying on local storage. A PXE-enabled network adapter can obtain configuration information and retrieve boot files from a server. This capability is frequently used for operating-system deployment, imaging, and centralized provisioning in business environments. Bluetooth and NFC are short-range wireless technologies, while Wi-Fi Direct enables peer-to-peer wireless communication. PXE is particularly useful for administrators managing many computers because systems can receive installation or deployment resources centrally.

Question 379.

Which connector is commonly associated with a computer’s analog microphone input?

1. RCA
2. 3.5mm audio jack
3. F-type
4. SC fiber

Correct Answer: 2

Explanation:

A 3.5mm audio jack is commonly used for analog microphone connections on computers and other consumer electronics. Depending on the device and connector configuration, a 3.5mm jack may support microphone input, headphone output, or combined headset functionality. RCA connectors are commonly found in consumer audio and video equipment, F-type connectors are widely used with coaxial cable, and SC is a fiber-optic connector. Audio ports may be color-coded or labeled with symbols to identify their functions. Modern computers may also provide microphone connectivity through USB or wireless interfaces.

Question 380.

Which device provides temporary electrical power during a utility outage?

1. Surge protector
2. Power strip
3. Line conditioner
4. UPS

Correct Answer: 4

Explanation:

A UPS, or uninterruptible power supply, provides temporary battery-backed electrical power when normal utility power fails. This gives computers and other connected equipment time to remain operational briefly and allows users to shut systems down safely. Depending on its design, a UPS may also provide protection against certain power disturbances. A surge protector primarily helps protect equipment from voltage spikes, while a power strip mainly expands the number of available outlets. A line conditioner can regulate or filter electrical power but does not necessarily provide battery backup.