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

 

Question 301.

Which connector carries both digital video and audio?

1. DVI-I
2. VGA
3. DisplayPort
4. PS/2

Correct Answer: 3

Explanation:

DisplayPort is a digital interface capable of carrying both video and audio signals over a single connection. It is widely used with desktop computers, workstations, monitors, and docking stations. VGA primarily carries analog video, while PS/2 is a legacy peripheral interface. DVI-I can carry digital and analog video but does not provide the same integrated audio capability commonly associated with DisplayPort. Technicians should verify the supported DisplayPort version, adapter requirements, resolution, refresh rate, and cable capabilities when connecting modern displays or troubleshooting display-quality problems.

Question 302.

Which wireless frequency generally provides greater range through walls?

1. 6 GHz
2. 2.4 GHz
3. 5 GHz
4. 60 GHz

Correct Answer: 2

Explanation:

The 2.4 GHz wireless band generally provides better propagation through walls and greater coverage than higher-frequency Wi-Fi bands. However, it typically has fewer non-overlapping channels and can experience more interference from other devices. The 5 GHz and 6 GHz bands can provide higher capacity and additional channels but generally have shorter effective coverage through obstacles. The 60 GHz band is designed for very short-range high-speed communication. Technicians should consider building materials, interference, channel utilization, client capabilities, and required performance when selecting a wireless frequency.

Question 303.

Which protocol resolves hostnames into IP addresses?

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

Correct Answer: 1

Explanation:

Domain Name System, or DNS, translates human-readable hostnames and domain names into IP addresses used for network communication. For example, a client can use DNS to determine the address associated with a web server instead of requiring users to remember its numerical IP address. DHCP automatically provides network configuration, SNMP supports network management, and NTP synchronizes system clocks. DNS problems can cause websites and network services to appear unavailable even when the physical network connection works correctly. Technicians should verify DNS server settings, connectivity, cached records, and name-resolution responses.

Question 304.

Which connector is traditionally associated with serial communication?

1. HDMI
2. RJ45
3. USB-C
4. DE-9

Correct Answer: 4

Explanation:

The DE-9 connector is commonly associated with legacy RS-232 serial communication on personal computers and other equipment. Serial interfaces were historically used for modems, console connections, industrial equipment, and various peripherals. HDMI carries digital audio and video, RJ45 is commonly used for Ethernet, and USB-C is a modern multipurpose connector. Although many modern computers no longer include native serial ports, technicians may encounter DE-9 interfaces on older systems or specialized equipment. USB-to-serial adapters can provide connectivity when a modern computer lacks a traditional serial port.

Question 305.

Which storage method writes data sequentially to magnetic media?

1. Optical disc
2. Tape
3. SSD
4. NVMe

Correct Answer: 2

Explanation:

Magnetic tape stores data sequentially, making it particularly suitable for backup and archival workloads where large amounts of information can be written or restored in sequence. Unlike SSDs and NVMe drives, tape does not provide the same random-access performance. Optical discs use laser-based recording or reading, while SSD and NVMe storage use flash memory. Technicians working with tape systems should consider cartridge capacity, drive compatibility, retention requirements, transfer speed, and backup procedures. Because locating a particular file may require moving through earlier tape content, tape is less suitable for frequent random-access workloads.

Question 306.

Which feature lets a CPU execute instructions using multiple processing cores?

1. Multicore processing
2. Disk mirroring
3. Port forwarding
4. Packet shaping

Correct Answer: 1

Explanation:

Multicore processing allows a processor package to contain multiple processing cores that can execute workloads concurrently. Operating systems and applications can distribute suitable tasks among available cores, improving multitasking and performance for appropriately designed workloads. Disk mirroring provides storage redundancy, port forwarding modifies network traffic destinations, and packet shaping manages network traffic rates. Technicians evaluating CPU performance should consider core count alongside clock frequency, architecture, cache, workload characteristics, and software optimization. More cores do not automatically produce the same performance improvement for every application.

Question 307.

Which component stores frequently accessed CPU instructions temporarily?

1. VRAM
2. Cache
3. CMOS
4. SSD

Correct Answer: 2

Explanation:

CPU cache is high-speed memory located within or near the processor and is used to store frequently accessed instructions and data. By keeping commonly needed information closer to the CPU, cache can reduce the time required to access information compared with retrieving it from system memory. VRAM supports graphics processing, CMOS-related storage maintains certain system configuration information, and SSDs provide persistent storage. Modern processors commonly use multiple cache levels, such as L1, L2, and L3. Technicians should understand cache as a performance optimization rather than a replacement for system RAM.

Question 308.

Which connector is designed for high-speed external peripherals and displays?

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

Correct Answer: 1

Explanation:

Thunderbolt is a high-speed interface that can support data transfer, display connectivity, and power delivery depending on the implementation. It is commonly found on modern laptops, docking stations, external storage devices, and professional peripherals. PS/2 and DB-9 are legacy interfaces, while RJ11 is commonly associated with telephone connections. Thunderbolt implementations use compatible physical connectors and can support multiple device types through a single connection. Technicians should verify the Thunderbolt version, device compatibility, cable requirements, and supported display or peripheral features when diagnosing connection problems.

Question 309.

Which addressing method automatically assigns a link-local IPv4 address?

1. APIPA
2. DNS
3. NAT
4. CIDR

Correct Answer: 1

Explanation:

Automatic Private IP Addressing, or APIPA, allows a Windows system to automatically assign itself a link-local IPv4 address when it cannot obtain an address from a DHCP server. APIPA addresses fall within the 169.254.0.0/16 range and are generally useful for limited local communication rather than normal routed network access. DNS handles name resolution, NAT translates network addresses, and CIDR represents IP networks using prefix notation. If a client unexpectedly receives an APIPA address, technicians should investigate DHCP availability, network connectivity, cabling, wireless association, and DHCP configuration.

Question 310.

Which device connects computers to a wireless network without cellular service?

1. GPS receiver
2. Wi-Fi adapter
3. NFC reader
4. Cellular modem

Correct Answer: 2

Explanation:

A Wi-Fi adapter allows a computer to connect to compatible wireless local-area networks. It may be integrated into the system or installed through an expansion interface such as USB or PCIe. A GPS receiver provides location information, an NFC reader handles very short-range communication, and a cellular modem connects through a mobile carrier’s network. When configuring a Wi-Fi adapter, technicians should verify drivers, supported standards, wireless security, antenna connections, and available networks. Signal strength and interference can also affect connection reliability and throughput.

Question 311.

Which printer component applies toner to the printed page?

1. Platen
2. Drum
3. Transfer roller
4. Printhead

Correct Answer: 3

Explanation:

The transfer roller in a laser printer helps transfer toner from the imaging process onto the paper. Laser printing uses several coordinated stages involving the photosensitive drum, toner, transfer components, and fuser. The platen is associated with paper positioning in certain printer designs, a printhead is commonly associated with inkjet printing, and the drum forms the electrostatic image used during toner development. Technicians troubleshooting laser printers should inspect consumables and components according to manufacturer procedures, especially when output shows repeating defects, poor toner transfer, streaking, or uneven coverage.

Question 312.

Which network device forwards packets between different IP networks?

1. Hub
2. Router
3. Patch panel
4. Repeater

Correct Answer: 2

Explanation:

A router forwards packets between different IP networks using routing information. It can connect separate local networks to one another or provide a path toward external networks such as the Internet. A hub simply repeats signals to connected ports, a patch panel provides organized physical cable termination, and a repeater regenerates or extends a signal. Routers can also provide additional functions such as NAT, DHCP, firewalling, and wireless networking depending on the device. Technicians configuring routers should verify addressing, routing tables, interfaces, gateways, and applicable security policies.

Question 313.

Which technology enables contactless payment from a smartphone?

1. NFC
2. GPS
3. SATA
4. Bluetooth

Correct Answer: 1

Explanation:

NFC enables very short-range wireless communication and is widely used for contactless payment systems on compatible smartphones and other devices. A user can bring the device close to a compatible payment terminal to initiate communication. GPS provides satellite-based positioning, SATA is a storage interface, and Bluetooth is designed for broader short-range device communication. NFC’s extremely short operating distance helps make intentional tap-based interactions practical. Technicians troubleshooting mobile payment functionality should check NFC settings, device compatibility, application configuration, security requirements, and whether the payment terminal supports the required contactless technology.

Question 314.

Which component helps prevent electrostatic discharge damage during servicing?

1. Surge protector
2. UPS
3. ESD wrist strap
4. Power strip

Correct Answer: 3

Explanation:

An ESD wrist strap helps safely dissipate static electrical charge from a technician while servicing sensitive computer components. Electrostatic discharge can damage electronic components even when the discharge is not noticeable to a person. Surge protectors and UPS devices protect against different electrical conditions, while a power strip primarily distributes electrical connections. Technicians should use appropriate ESD precautions along with proper grounding practices and antistatic work surfaces when handling memory, processors, expansion cards, and other sensitive components. Following manufacturer and workplace safety procedures is essential during hardware maintenance.

Question 315.

Which motherboard form factor is smaller than MicroATX?

1. ATX
2. Mini-ITX
3. E-ATX
4. XL-ATX

Correct Answer: 2

Explanation:

Mini-ITX is a compact motherboard form factor that is smaller than MicroATX. Its reduced dimensions make it useful for small-form-factor computers and space-constrained installations. Standard ATX and larger extended form factors occupy more physical space. Mini-ITX boards generally provide fewer expansion options, so technicians should carefully evaluate storage, graphics, memory, cooling, and peripheral requirements before selecting one. Case compatibility is also important because the enclosure must support the motherboard’s mounting pattern and provide adequate clearance for the installed components.

Question 316.

Which protocol securely transfers files using an SSH connection?

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

Correct Answer: 3

Explanation:

SFTP, or SSH File Transfer Protocol, provides file-transfer capabilities through an SSH-secured connection. It encrypts authentication credentials and transferred data, making it suitable for secure remote file operations. Traditional FTP does not inherently provide encryption, TFTP is a lightweight file-transfer protocol with minimal security features, and HTTP is primarily a web communication protocol. Technicians may use SFTP when transferring configuration files, backups, logs, or other sensitive information between systems. Proper authentication, permissions, and account controls should still be configured to protect the remote file-transfer service.

Question 317.

Which wireless feature allows devices to connect directly without an access point?

1. Infrastructure mode
2. Ad hoc mode
3. Roaming mode
4. Bridge mode

Correct Answer: 2

Explanation:

Ad hoc wireless networking allows compatible devices to communicate directly with one another without requiring a traditional wireless access point. This differs from infrastructure mode, where clients connect through an access point. Ad hoc networking can be useful for certain temporary or peer-to-peer scenarios, although modern operating systems and wireless technologies often favor other direct-connect mechanisms. Technicians should understand the capabilities and limitations of the devices involved, including security support, compatibility, range, and configuration requirements when establishing a direct wireless connection.

Question 318.

Which component provides backup storage of system configuration settings?

1. CMOS battery
2. GPU
3. Heat sink
4. NIC

Correct Answer: 1

Explanation:

The CMOS battery helps maintain certain motherboard configuration information and keeps the real-time clock operating when the computer is powered off. On many modern systems, firmware configuration is stored using nonvolatile memory, but the battery still supports the system’s real-time clock and may be associated with retaining configuration behavior depending on the platform. A GPU handles graphics processing, a heat sink dissipates heat, and a NIC provides network connectivity. A failing battery can result in incorrect system time or loss of certain settings after power is removed.

Question 319.

Which network service translates private addresses to a public address?

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

Correct Answer: 3

Explanation:

Network Address Translation, or NAT, allows private IP addresses to communicate through a public address by translating network addressing information as traffic passes through a compatible device. This is commonly used on routers connecting private local networks to the Internet. DHCP provides network configuration, DNS resolves names, and NTP synchronizes system clocks. NAT can also help conserve public IPv4 address space by allowing multiple private devices to share a public address. Technicians troubleshooting Internet access should verify NAT configuration, routing, addressing, and the gateway’s external connectivity.

Question 320.

Which display technology uses organic light-emitting diodes?

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

Correct Answer: 2

Explanation:

OLED stands for Organic Light-Emitting Diode and uses organic compounds that emit light when electrically stimulated. Unlike conventional LCD panels that require a separate backlight, OLED pixels can produce their own light. This design can provide deep blacks, high contrast, and thin display constructions. CRT technology uses electron beams and phosphors, plasma displays use gas-filled cells, and LCDs use liquid crystals with a backlight system. Technicians evaluating displays should consider resolution, refresh rate, brightness, contrast, connectivity, power requirements, and the characteristics of the specific panel technology.