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

 

Question 261.

Which motherboard form factor is smaller than standard ATX?

1. E-ATX
2. XL-ATX
3. ATX
4. MicroATX

Correct Answer: 4

Explanation:

MicroATX is a smaller motherboard form factor than standard ATX. It was designed to provide many of the features of ATX while reducing the physical footprint of the motherboard and compatible computer case. MicroATX boards typically have fewer expansion slots than full-sized ATX boards, although exact configurations vary between models. E-ATX and XL-ATX are generally larger form factors, while standard ATX occupies more physical space. When selecting a motherboard, technicians should verify case compatibility, mounting-hole positions, expansion requirements, memory support, and power connections.

Question 262.

Which technology allows a phone to share its cellular connection?

1. Tethering
2. NFC
3. GPS
4. RFID

Correct Answer: 1

Explanation:

Tethering allows a smartphone to share its cellular Internet connection with another device. The shared connection can commonly be provided through Wi-Fi hotspot functionality, Bluetooth, or a USB cable. NFC is designed for very short-range communication, GPS provides location information, and RFID uses radio signals for identification and tracking. Tethering is useful when a laptop or tablet needs Internet access where conventional Wi-Fi is unavailable. Technicians should consider mobile-data limits, carrier restrictions, battery consumption, security settings, and the number of connected clients when configuring a mobile hotspot.

Question 263.

Which cable type is commonly used for digital audio over optical transmission?

1. TOSLINK
2. RCA
3. TRS
4. XLR

Correct Answer: 1

Explanation:

TOSLINK is an optical interface commonly used to transmit digital audio using light through a fiber-based cable. It can connect compatible computers, televisions, receivers, and other audio equipment. RCA connectors are frequently used for analog or digital electrical signals, TRS connectors commonly carry analog audio, and XLR connectors are widely used for balanced professional audio. Because TOSLINK uses optical transmission, it is electrically isolated between connected devices. Technicians should check the correct optical port, cable seating, audio-output configuration, and supported audio formats when troubleshooting a TOSLINK connection.

Question 264.

Which wireless technology is designed for very short-range personal connections?

1. Wi-Fi
2. Bluetooth
3. LTE
4. WiMAX

Correct Answer: 2

Explanation:

Bluetooth is designed for short-range wireless communication between personal devices. It can connect peripherals such as keyboards, mice, headsets, speakers, smartphones, and other compatible equipment. Wi-Fi is primarily designed for wireless local-area networking, LTE provides cellular broadband communication, and WiMAX was developed for longer-range wireless broadband applications. Bluetooth devices generally need to be paired before exchanging data or providing services. When troubleshooting Bluetooth connectivity, technicians should check discoverability, pairing status, supported profiles, distance, interference, battery level, and whether the appropriate operating-system settings are enabled.

Question 265.

Which memory technology can correct certain single-bit errors automatically?

1. ECC
2. DDR
3. SRAM
4. SDRAM

Correct Answer: 1

Explanation:

ECC, or Error-Correcting Code memory, can detect and correct certain memory errors, particularly single-bit errors. It is commonly used in servers, workstations, and other systems where data integrity and system reliability are important. DDR describes a family of synchronous dynamic memory technologies, while SRAM is commonly used for cache and other specialized applications. SDRAM is a broader category of synchronized dynamic memory. ECC support depends on both the motherboard and processor platform, so technicians should verify system compatibility before installing ECC modules.

Question 266.

Which network address uniquely identifies a network interface at Layer 2?

1. IP address
2. MAC address
3. Port number
4. Hostname

Correct Answer: 2

Explanation:

A MAC address identifies a network interface at the data-link layer and is associated with the network adapter’s hardware identity. Ethernet switches commonly use MAC addresses to determine where frames should be forwarded within a local network. An IP address operates at the network layer, a port number identifies an application or service endpoint, and a hostname provides a human-readable system name. Technicians may use MAC addresses when troubleshooting switching, DHCP reservations, device identification, and network-access controls. Some modern devices can use randomized MAC addresses for certain wireless connections.

Question 267.

Which connector is commonly used for analog computer audio?

1. 3.5mm TRS
2. RJ45
3. F-type
4. DB-9

Correct Answer: 1

Explanation:

A 3.5mm TRS connector is commonly used for analog computer audio connections, including headphones, speakers, and microphones. TRS stands for Tip, Ring, and Sleeve, although the exact signal configuration depends on the connector and equipment. RJ45 is associated with Ethernet networking, F-type connectors are commonly used with coaxial connections, and DB-9 is associated with several legacy interfaces. When troubleshooting analog audio, technicians should check the correct jack, volume settings, input or output selection, connector condition, and whether the operating system recognizes the audio device.

Question 268.

Which device converts AC power into DC power for a laptop?

1. UPS
2. Surge protector
3. AC adapter
4. Power strip

Correct Answer: 3

Explanation:

A laptop AC adapter converts household alternating-current power into the direct-current voltage required by the laptop. The adapter also provides electrical characteristics appropriate for the device and charges its battery when supported. A UPS provides temporary battery-backed power, a surge protector helps protect equipment from voltage spikes, and a power strip primarily distributes electrical power to multiple devices. Technicians should verify the adapter’s output voltage, current rating, connector type, and polarity where applicable. Using an incompatible adapter can prevent proper operation or potentially damage equipment.

Question 269.

Which feature protects a computer from unauthorized firmware modification?

1. Secure Boot
2. File compression
3. Screen timeout
4. Disk defragmentation

Correct Answer: 1

Explanation:

Secure Boot helps protect the boot process by allowing firmware to verify trusted boot components before executing them. It is commonly associated with UEFI-based systems and helps prevent unauthorized or modified boot software from being loaded during startup. File compression reduces storage requirements, screen timeout limits active display time, and disk defragmentation reorganizes certain types of stored data. Secure Boot works as part of a broader platform-security architecture and does not replace operating-system security controls. Technicians should verify firmware settings and operating-system compatibility when enabling this feature.

Question 270.

Which storage technology uses spinning magnetic platters?

1. SSD
2. HDD
3. NVMe
4. Flash drive

Correct Answer: 2

Explanation:

A hard disk drive uses spinning magnetic platters and movable read/write heads to store and retrieve data. The mechanical design distinguishes HDDs from solid-state storage, which uses flash memory and has no moving mechanical storage components. NVMe is a storage protocol commonly used with PCIe-based solid-state drives, while a flash drive also uses nonvolatile flash memory. HDDs remain useful where high capacity at relatively low cost is important. Technicians should consider rotational speed, interface, capacity, physical size, noise, vibration, and expected workload when selecting an HDD.

Question 271.

Which technology provides wireless access to a local network?

1. Access point
2. Modem
3. Repeater
4. Patch panel

Correct Answer: 1

Explanation:

A wireless access point provides Wi-Fi connectivity to client devices and bridges wireless traffic with a wired network. It allows laptops, smartphones, tablets, and other wireless devices to communicate with network resources. A modem provides connectivity to a service provider, a repeater extends or regenerates a signal, and a patch panel provides organized physical cable termination. When deploying an access point, technicians should consider channel selection, coverage, authentication, encryption, placement, interference, and backhaul connectivity. Proper configuration helps provide reliable wireless service while maintaining appropriate network security.

Question 272.

Which protocol is commonly used to synchronize computer clocks?

1. DNS
2. DHCP
3. NTP
4. SMB

Correct Answer: 3

Explanation:

Network Time Protocol, or NTP, is used to synchronize system clocks across networked devices. Accurate time is important for authentication, logging, certificates, scheduled tasks, troubleshooting, and security monitoring. DNS resolves hostnames, DHCP provides network configuration information, and SMB supports file and printer sharing. NTP allows systems to obtain time from configured time sources and adjust their clocks appropriately. Technicians troubleshooting time synchronization should verify network reachability, configured time servers, firewall rules, system time settings, and whether the device is correctly participating in the intended time-synchronization hierarchy.

Question 273.

Which component dissipates heat from a processor?

1. Heat sink
2. NIC
3. TPM
4. Chipset

Correct Answer: 1

Explanation:

A heat sink transfers heat away from a processor and releases it into the surrounding airflow. Many CPU cooling solutions combine a heat sink with a fan to increase heat dissipation. The NIC provides network connectivity, the TPM supplies hardware-based security functions, and the chipset manages various motherboard communication functions. Proper thermal contact between the processor and heat sink is important, and thermal compound is commonly used to improve heat transfer across microscopic surface gaps. Technicians should ensure the cooler is correctly mounted and that airflow is unobstructed.

Question 274.

Which technology allows a display to respond to finger input?

1. Webcam
2. Digitizer
3. Microphone
4. Accelerometer

Correct Answer: 2

Explanation:

A touchscreen digitizer detects touch input and converts physical contact into signals that the operating system can interpret. It works alongside the display panel to create an interactive touchscreen interface. A webcam captures images and video, a microphone captures sound, and an accelerometer measures movement or orientation. A faulty digitizer can cause missed touches, inaccurate touch locations, or unintended input even when the display itself still produces a clear image. Technicians troubleshooting touchscreen problems should check drivers, calibration, physical damage, connector integrity, and whether the issue occurs throughout the entire screen.

Question 275.

Which wireless standard operates primarily in the 5 GHz band?

1. 802.11b
2. 802.11g
3. 802.11a
4. 802.11n

Correct Answer: 3

Explanation:

IEEE 802.11a was designed to operate in the 5 GHz wireless band. It provided higher-frequency wireless networking than the earlier 2.4 GHz-focused 802.11b and 802.11g standards. 802.11n can operate in both 2.4 GHz and 5 GHz bands depending on the implementation and configuration. Technicians should distinguish wireless standards from frequency bands because newer standards may support multiple bands. When troubleshooting older wireless equipment, compatibility, channel availability, regional regulations, security configuration, and client capabilities should all be considered.

Question 276.

Which RAID level mirrors data between two drives?

1. RAID 0
2. RAID 5
3. RAID 10
4. RAID 1

Correct Answer: 4

Explanation:

RAID 1 uses mirroring to maintain duplicate copies of data across two drives. If one drive fails, the mirrored copy can remain available, providing redundancy against a single-drive failure. RAID 0 uses striping without redundancy, RAID 5 uses striping with distributed parity, and RAID 10 combines mirroring with striping. RAID improves availability or performance depending on the level, but it is not a substitute for a separate backup strategy. Technicians should consider usable capacity, drive requirements, rebuild behavior, controller support, and organizational recovery requirements when selecting RAID.

Question 277.

Which power rating indicates a PSU’s energy efficiency?

1. 80 PLUS
2. HDMI
3. PCIe
4. SATA

Correct Answer: 1

Explanation:

80 PLUS is an efficiency certification program used to indicate the energy efficiency of compatible power supplies. Different certification levels represent varying efficiency requirements under specified load conditions. HDMI is a digital audio/video interface, PCIe is an expansion-bus technology, and SATA is commonly used for storage connectivity. PSU efficiency affects how much input electrical power is converted into usable output power versus dissipated as heat. Technicians selecting a power supply should also consider wattage, connector availability, output rails, form factor, system load, and graphics-card requirements.

Question 278.

Which port is commonly used for secure web traffic?

1. 21
2. 25
3. 443
4. 110

Correct Answer: 3

Explanation:

TCP port 443 is commonly associated with HTTPS, which provides encrypted web communication using TLS. Secure websites and many web-based services use HTTPS to protect information exchanged between clients and servers. Port 21 is commonly associated with FTP control traffic, port 25 is traditionally associated with SMTP, and port 110 is associated with POP3. Technicians troubleshooting HTTPS connectivity should check DNS resolution, firewall rules, proxy settings, certificate validity, system time, and whether outbound or inbound traffic to the required service is permitted.

Question 279.

Which device provides multiple wired network connections?

1. Modem
2. Switch
3. UPS
4. KVM

Correct Answer: 2

Explanation:

A network switch provides multiple Ethernet ports through which wired devices can connect to a local network. It forwards Ethernet frames toward the appropriate destination based on learned MAC-address information. A modem provides connectivity to a service provider, a UPS supplies battery-backed electrical power, and a KVM switch allows multiple computers to share a console. Switches are available in different port counts, speeds, management capabilities, and power options. Technicians should verify port speed, cable compatibility, VLAN requirements, PoE support, and configuration settings when deploying or troubleshooting a network switch.

Question 280.

Which battery technology is commonly used in modern laptops?

1. Nickel-cadmium
2. Alkaline
3. Lithium-ion
4. Lead-acid

Correct Answer: 3

Explanation:

Lithium-ion batteries are widely used in modern laptops because they provide relatively high energy density in a compact and rechargeable design. They can supply the power required for portable computing while keeping device weight manageable. Nickel-cadmium batteries are older rechargeable technology, alkaline batteries are generally disposable, and lead-acid batteries are typically used in larger applications such as backup power systems. Technicians should use the manufacturer’s specified battery and charger and follow appropriate handling procedures. Battery health can be affected by age, temperature, charging behavior, and usage patterns.