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

 

Question 241.

Which device provides network connectivity through cellular service?

1. Wireless router
2. Ethernet bridge
3. Cable modem
4. Cellular modem

Correct Answer: 4

Explanation:

A cellular modem provides network connectivity through a mobile carrier’s cellular network. It can use technologies such as LTE or 5G to establish a data connection without requiring a traditional wired Internet service. Wireless routers distribute network access, Ethernet bridges connect compatible wired segments, and cable modems communicate through cable broadband infrastructure. Cellular modems are useful for mobile computing, backup connectivity, remote locations, and systems where wired service is unavailable. Technicians should verify carrier compatibility, supported cellular bands, SIM or eSIM requirements, signal strength, and appropriate drivers when configuring cellular connectivity.

Question 242.

Which connector commonly connects a keyboard to a modern computer?

1. USB
2. RJ11
3. VGA
4. SATA

Correct Answer: 1

Explanation:

USB is the most common modern interface for connecting wired keyboards to computers. USB keyboards can use different physical connector types, with USB Type-A traditionally common on computers and USB-C increasingly appearing on newer equipment. RJ11 is associated with telephone connections, VGA carries analog video, and SATA is used for internal storage devices. USB keyboards generally receive both power and data communication through the same connection. When troubleshooting a keyboard, technicians should check the USB port, physical connection, operating-system detection, drivers, and whether the keyboard works correctly on another compatible system.

Question 243.

Which component provides additional power to a high-end graphics card?

1. SATA connector
2. EPS connector
3. PCIe power connector
4. Berg connector

Correct Answer: 3

Explanation:

A PCIe power connector provides additional electrical power to graphics cards that require more power than the motherboard’s PCIe slot can supply. Depending on the graphics card and power supply, different PCIe auxiliary connector configurations may be used. SATA connectors primarily power storage devices, EPS connectors provide dedicated processor power, and Berg connectors were commonly associated with older floppy drives. Technicians installing a discrete GPU should verify the graphics card’s power requirements and ensure that the power supply provides the appropriate dedicated connectors. Secure connections are important for stable graphics operation.

Question 244.

Which feature allows a computer to continue operating after a brief power failure?

1. Surge protection
2. UPS backup
3. Voltage regulation
4. Power strip

Correct Answer: 2

Explanation:

A UPS provides battery-backed power that can keep a computer operating when utility power is temporarily interrupted. This allows the system to continue running for a limited period and gives users or automated systems time to save work or perform an orderly shutdown. Surge protection helps limit voltage spikes but does not provide sustained battery power. Voltage regulation stabilizes certain electrical conditions, while a power strip primarily provides additional outlets. Technicians should select a UPS based on connected load, runtime requirements, battery capacity, and the equipment’s power characteristics.

Question 245.

Which interface is commonly used for internal high-speed NVMe storage?

1. SATA
2. USB
3. PCIe
4. PATA

Correct Answer: 3

Explanation:

NVMe storage commonly communicates through PCI Express, allowing solid-state drives to use high-bandwidth lanes for fast data transfer. NVMe was designed specifically for nonvolatile memory and provides efficient command handling and parallelism compared with older storage protocols. SATA is widely used by conventional SSDs and hard drives, USB is primarily an external peripheral interface, and PATA is an older parallel storage technology. Technicians should understand that M.2 describes a physical form factor, while NVMe describes a storage protocol that commonly operates over PCIe.

Question 246.

Which technology reduces interference between copper network wires?

1. Shielding
2. Twisting
3. Grounding
4. Amplification

Correct Answer: 2

Explanation:

Twisting the individual copper conductors in twisted-pair Ethernet cable helps reduce electromagnetic interference and crosstalk between wire pairs. Different cable categories use carefully designed twisting rates to maintain signal quality. Shielding can provide additional protection against external interference, but it is not present in every twisted-pair cable type. Grounding addresses electrical safety and interference conditions in appropriate installations, while amplification increases signal strength. Technicians should preserve cable twists as close as practical to the termination point because excessive untwisting can degrade network performance.

Question 247.

Which component provides visual output from a computer?

1. Monitor
2. Microphone
3. Scanner
4. Keyboard

Correct Answer: 1

Explanation:

A monitor displays visual information generated by the computer, including text, graphics, video, and user-interface elements. Modern monitors commonly use LCD or OLED display technologies and can connect through interfaces such as HDMI or DisplayPort. A microphone captures audio, a scanner digitizes physical documents, and a keyboard provides text and command input. Technicians troubleshooting monitor problems should check power, input selection, cable connections, supported resolution, refresh rate, and graphics-driver settings. Display problems can originate from either the monitor itself or the computer’s graphics hardware and configuration.

Question 248.

Which technology allows two devices to exchange data by touching them?

1. Bluetooth
2. Wi-Fi
3. NFC
4. Infrared

Correct Answer: 3

Explanation:

Near Field Communication, or NFC, allows compatible devices to exchange information over a very short distance, often by bringing them extremely close together or tapping them together. NFC is used for contactless payments, access systems, quick pairing, and other short-range interactions. Bluetooth generally operates across a greater distance, Wi-Fi provides local networking, and infrared uses light-based communication. NFC’s short operating range can reduce accidental interactions and makes it convenient for intentional tap-based transactions. Technicians should verify device support and operating-system settings when troubleshooting NFC functionality.

Question 249.

Which service automatically supplies a device with an IP address?

1. DNS
2. DHCP
3. FTP
4. SSH

Correct Answer: 2

Explanation:

DHCP automatically provides network clients with IP addressing information. A DHCP lease can include an IP address, subnet mask, default gateway, DNS server information, and other network parameters. DNS performs name resolution, FTP provides file-transfer services, and SSH provides secure remote command-line access. DHCP simplifies network administration by avoiding manual configuration on every client. When troubleshooting a device that cannot communicate properly, technicians can check whether the system received a valid DHCP lease and whether the assigned configuration matches the intended network.

Question 250.

Which storage device uses flash memory and no moving parts?

1. Tape drive
2. HDD
3. SSD
4. Optical drive

Correct Answer: 3

Explanation:

A solid-state drive, or SSD, uses flash memory to store information and contains no spinning platters or moving read/write heads. This allows SSDs to provide fast access times and improved resistance to physical movement compared with traditional hard disk drives. Tape drives use magnetic tape, HDDs use spinning magnetic platters, and optical drives use rotating optical media. SSDs are available through interfaces such as SATA and PCIe/NVMe. Technicians should consider capacity, interface, endurance, performance, and system compatibility when selecting an SSD for an upgrade.

Question 251.

Which device allows one monitor to display output from several computers?

1. KVM switch
2. Wireless bridge
3. Media converter
4. Network hub

Correct Answer: 1

Explanation:

A KVM switch allows multiple computers to share a monitor and input devices such as a keyboard and mouse. Users can switch between connected systems while using the same console. Wireless bridges connect network segments, media converters change network signaling between physical media, and network hubs repeat traffic to connected ports. KVM equipment is commonly used in server rooms, testing environments, and administrative workstations where several systems need to be controlled from one location. Technicians should verify video standards, supported resolutions, peripheral interfaces, and switching methods when selecting a KVM device.

Question 252.

Which printer type uses liquid ink sprayed through tiny nozzles?

1. Laser
2. Thermal
3. Inkjet
4. Impact

Correct Answer: 3

Explanation:

Inkjet printers create images by spraying tiny droplets of liquid ink through microscopic nozzles onto paper. They are commonly used for color documents, photographs, and general home or small-office printing. Laser printers use toner and electrostatic imaging, thermal printers use heat-sensitive media or specialized transfer processes, and impact printers physically strike an inked ribbon. Technicians troubleshooting inkjet printers should consider clogged nozzles, ink levels, printhead alignment, paper type, drivers, and print-quality settings. Regular maintenance can help prevent dried ink and degraded output quality.

Question 253.

Which component detects whether a laptop lid is closed?

1. Ambient light sensor
2. Accelerometer
3. Hall-effect sensor
4. Fingerprint reader

Correct Answer: 3

Explanation:

A Hall-effect sensor can detect the presence of a nearby magnetic field and is commonly used in laptops to determine whether the display lid is closed. A small magnet integrated into the lid can interact with the sensor in the base, allowing the operating system to trigger actions such as sleep or display shutdown. An ambient light sensor measures surrounding illumination, an accelerometer detects movement and orientation, and a fingerprint reader captures biometric information. Technicians troubleshooting lid-related power behavior should consider sensor operation, magnets, system settings, and hardware connections.

Question 254.

Which connector is commonly used for Ethernet networking?

1. RJ11
2. RJ45
3. DE-9
4. F-type

Correct Answer: 2

Explanation:

RJ45 is commonly used with twisted-pair Ethernet networking and is typically found on network interfaces, switches, routers, and patch panels. It accommodates the conductors required for Ethernet communication and uses standardized wiring schemes such as T568A and T568B. RJ11 is commonly associated with telephone wiring, DE-9 is a legacy connector used for serial and other interfaces, and F-type connectors are commonly associated with coaxial cable. Technicians should inspect Ethernet connectors for damaged tabs, improper termination, loose connections, and incorrect cable wiring when troubleshooting network links.

Question 255.

Which feature encrypts an entire computer’s storage drive?

1. Full-disk encryption
2. Screen lock
3. File compression
4. User permissions

Correct Answer: 1

Explanation:

Full-disk encryption protects data stored across an entire storage device by encrypting the drive’s contents. Without the appropriate authentication or recovery mechanism, the stored information is difficult to access if the drive is removed or the system is otherwise accessed outside its normal environment. Screen locks restrict active sessions, file compression reduces data size, and user permissions control access to files and resources. Technicians implementing full-disk encryption should understand recovery keys, hardware support, performance considerations, and backup requirements to avoid data loss when authentication credentials become unavailable.

Question 256.

Which device converts fiber-optic networking to copper Ethernet?

1. Network switch
2. Media converter
3. Wireless access point
4. Cable modem

Correct Answer: 2

Explanation:

A media converter can translate network signaling between different physical media, such as fiber-optic cabling and copper Ethernet. This allows existing fiber infrastructure to connect with equipment that provides standard copper Ethernet ports. A network switch distributes network connectivity, a wireless access point provides Wi-Fi connectivity, and a cable modem communicates with cable broadband infrastructure. Technicians selecting a media converter should verify supported Ethernet speeds, fiber type, connector style, transmission distance, and duplex requirements. Proper compatibility is necessary for reliable communication across the converted link.

Question 257.

Which technology provides hardware-based protection for cryptographic keys?

1. TPM
2. GPU
3. NIC
4. Codec

Correct Answer: 1

Explanation:

A Trusted Platform Module, or TPM, provides hardware-based security functions including protected storage for cryptographic keys. It can support features such as device encryption, secure authentication, measured boot, and platform integrity mechanisms. A GPU performs graphics processing, a NIC provides network connectivity, and a codec handles encoding or decoding of digital media. TPM functionality is integrated into many modern computing platforms. Technicians should verify TPM availability and firmware settings when configuring security features that depend on trusted hardware, particularly when deploying operating systems with hardware-security requirements.

Question 258.

Which protocol provides secure remote command-line access?

1. FTP
2. HTTP
3. SSH
4. TFTP

Correct Answer: 3

Explanation:

SSH, or Secure Shell, provides encrypted remote command-line access to compatible systems. It is widely used by administrators and technicians to manage servers, network devices, and other systems remotely. FTP is primarily designed for file transfers, HTTP supports web communication, and TFTP provides a lightweight file-transfer mechanism with minimal functionality and security. SSH protects authentication credentials and session data through encryption. Technicians should still use strong authentication, appropriate access controls, and secure network configurations when enabling remote administrative access through SSH.

Question 259.

Which component supplies power to an external USB peripheral?

1. Network switch
2. USB port
3. HDMI port
4. Audio jack

Correct Answer: 2

Explanation:

A USB port can provide electrical power to compatible connected peripherals while also carrying data. Devices such as keyboards, mice, flash drives, external storage, and some rechargeable accessories can draw power directly from USB. HDMI primarily carries audio and video, audio jacks carry analog or compatible audio signals, and network switches provide network connectivity and may provide power only when specifically supporting PoE. Technicians should consider the USB port’s power capabilities when troubleshooting peripherals that disconnect, fail to initialize, or require more power than the port can supply.

Question 260.

Which component stores graphics data for a discrete video card?

1. System RAM
2. CMOS
3. VRAM
4. ROM

Correct Answer: 3

Explanation:

VRAM, or video memory, provides dedicated storage for graphics data used by a discrete graphics processor. It can hold textures, frame buffers, shaders, and other information required during graphics rendering. System RAM supports general-purpose computing, CMOS-related memory stores certain configuration information depending on the platform, and ROM traditionally refers to nonvolatile firmware storage. VRAM capacity and bandwidth can influence how effectively a graphics card handles demanding workloads, especially at higher resolutions and detail levels. Technicians should verify graphics-memory specifications when assessing systems for gaming, rendering, or professional visualization tasks.