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

 

Question 81.

Which component converts digital video data into rendered images?

1. Power supply
2. Network card
3. Sound adapter
4. Graphics processor

Correct Answer: 4

Explanation:

A graphics processing unit, or GPU, performs calculations required to render images, video, and graphical interfaces. Dedicated GPUs can have their own video memory and are commonly used for gaming, professional graphics, video editing, and other visually intensive workloads. A power supply provides electrical power, a network card handles network communication, and a sound adapter processes audio signals. When selecting a graphics solution, technicians should consider GPU capability, available video memory, display outputs, power requirements, physical dimensions, and compatibility with the motherboard and operating system.

Question 82.

Which interface is commonly used for internal optical drives?

1. SATA
2. VGA
3. RJ45
4. PS/2

Correct Answer: 1

Explanation:

SATA is a common interface for internal optical drives such as DVD and Blu-ray drives. It provides a serial connection between the drive and motherboard. VGA is a video interface, RJ45 is commonly associated with Ethernet networking, and PS/2 is traditionally used for keyboards and mice. When installing an internal optical drive, technicians should connect both appropriate power and data cables and verify that the drive is detected by firmware and the operating system. Although optical drives are less common in modern computers, they remain useful for certain legacy and media-access requirements.

Question 83.

Which wireless standard introduced Wi-Fi 6?

1. 802.11ac
2. 802.11g
3. 802.11ax
4. 802.11n

Correct Answer: 3

Explanation:

IEEE 802.11ax is commonly marketed as Wi-Fi 6. It introduced improvements designed to increase efficiency, capacity, and performance, particularly in environments containing many connected devices. Features associated with Wi-Fi 6 include OFDMA and improved scheduling mechanisms. 802.11ac is commonly associated with Wi-Fi 5, while 802.11n and 802.11g represent earlier Wi-Fi generations. When deploying Wi-Fi 6, technicians should verify that access points and client devices support the standard and consider channel configuration, interference, coverage, and firmware compatibility.

Question 84.

Which device allows one keyboard and mouse to control several computers?

1. KVM switch
2. Network hub
3. USB charger
4. Media converter

Correct Answer: 1

Explanation:

A KVM switch allows a single keyboard, video display, and mouse setup to control multiple computers. KVM stands for Keyboard, Video, and Mouse. The technician can switch between connected systems without requiring separate input devices for each computer. A network hub repeats network traffic, a USB charger provides electrical power, and a media converter translates signals between different network media. KVM equipment is particularly useful in server rooms and test environments where multiple computers need to be accessed from one workstation.

Question 85.

Which connector is commonly associated with older serial devices?

1. RJ45
2. DB-9
3. HDMI
4. SATA

Correct Answer: 2

Explanation:

The DB-9 connector is commonly associated with legacy serial communication, particularly RS-232 connections. Older computers and peripherals such as modems, industrial equipment, and certain management interfaces frequently used this connector. RJ45 is commonly associated with Ethernet networking, HDMI carries digital audio and video, and SATA connects storage devices. Although modern systems rarely include native serial ports, technicians may encounter them when supporting legacy equipment. USB-to-serial adapters can provide connectivity when a current computer lacks a traditional DB-9 serial interface.

Question 86.

Which feature allows a CPU to temporarily increase its operating frequency?

1. Turbo Boost
2. Secure Boot
3. Hypervisor
4. ECC

Correct Answer: 1

Explanation:

Turbo Boost is a processor technology that can dynamically increase CPU operating frequency when workload, temperature, power, and other conditions permit. This can provide additional performance for demanding tasks without requiring the processor to operate continuously at its maximum possible frequency. Secure Boot protects the startup process by validating trusted software, a hypervisor manages virtual machines, and ECC provides error detection and correction for supported memory systems. Turbo behavior depends on the processor model, cooling solution, workload, power limits, and system firmware configuration.

Question 87.

Which storage interface uses a PCIe bus for high-speed data transfer?

1. PATA
2. NVMe
3. IDE
4. SCSI

Correct Answer: 2

Explanation:

NVMe is a storage protocol designed to operate over PCI Express and provide efficient communication with modern solid-state storage. It supports high throughput and low latency compared with older storage protocols designed for mechanical drives. PATA and IDE refer to older parallel storage technologies, while traditional SCSI is an older storage interface family. NVMe drives are frequently implemented using the M.2 form factor, although M.2 describes physical form rather than the protocol itself. Technicians should verify both physical compatibility and supported storage protocol before installation.

Question 88.

Which network device regenerates signals to extend transmission distance?

1. Router
2. Switch
3. Repeater
4. Firewall

Correct Answer: 3

Explanation:

A repeater regenerates or retransmits network signals to extend the distance over which data can travel. It is useful when a signal would otherwise degrade before reaching its destination. A switch forwards frames between network ports, a router forwards traffic between IP networks, and a firewall applies security policies to network traffic. Repeaters operate at a relatively basic level and do not provide the routing or traffic-control capabilities of more advanced network devices. Technicians should consider maximum cable lengths and the appropriate type of repeater for the transmission medium.

Question 89.

Which connector is commonly used for digital audio output?

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

Correct Answer: 3

Explanation:

TOSLINK is an optical digital audio connection that transmits audio using pulses of light. It is commonly used with compatible computers, televisions, receivers, and other audio equipment. RJ11 is associated with telephone connections, VGA provides analog video, and SATA is used for storage connectivity. Optical audio connections can help avoid electrical interference because the signal travels through an optical fiber rather than a conductive cable. When troubleshooting TOSLINK audio, technicians should verify the correct output device, receiver input, cable seating, optical signal, and supported audio format.

Question 90.

Which component maintains the computer’s date and time when powered off?

1. System RAM
2. CMOS battery
3. CPU cache
4. GPU memory

Correct Answer: 2

Explanation:

The CMOS battery provides a small continuous power source that helps maintain the real-time clock when the computer is powered off. A depleted battery can result in an incorrect system date and time and may cause certain firmware settings to reset or be lost on compatible systems. System RAM, CPU cache, and GPU memory are volatile memory technologies and do not maintain their contents without normal system power. When a computer repeatedly loses its date and time after shutdown, checking the motherboard battery is a common troubleshooting step.

Question 91.

Which cable is designed for high-speed wired Ethernet connections?

1. Cat 6
2. RG-6
3. Telephone cord
4. Flat ribbon

Correct Answer: 1

Explanation:

Cat 6 is a twisted-pair Ethernet cable category designed to support high-speed network communication. It provides improved specifications for frequency and crosstalk compared with older categories and can support Gigabit Ethernet and, under appropriate conditions, higher-speed Ethernet standards. RG-6 is commonly used for coaxial applications, telephone cords are designed for telephone connections, and flat ribbon cables are generally used for internal device connections. Technicians should select the appropriate Ethernet cable category based on required speed, distance, installation environment, and network equipment.

Question 92.

Which laptop component provides built-in wireless network connectivity?

1. Webcam
2. WLAN adapter
3. Touchpad
4. Speaker

Correct Answer: 2

Explanation:

A WLAN adapter provides wireless local-area network connectivity, allowing a laptop to connect to compatible Wi-Fi networks. The adapter may be integrated directly into the motherboard or installed as a replaceable module depending on the device design. A webcam captures video, a touchpad provides pointer control, and speakers produce audio. If Wi-Fi is unavailable, technicians should verify that the wireless adapter is enabled, correctly recognized by the operating system, equipped with an appropriate driver, and not disabled through a hardware switch, function key, firmware setting, or operating-system configuration.

Question 93.

Which technology allows secure storage of cryptographic keys in hardware?

1. TPM
2. RAID
3. DHCP
4. NFC

Correct Answer: 1

Explanation:

A Trusted Platform Module can securely store cryptographic material and perform hardware-assisted security operations. It can support features such as disk encryption, measured boot, and platform authentication. RAID is a storage technology, DHCP automatically supplies network configuration information, and NFC provides short-range wireless communication. TPM functionality can be especially important when deploying operating-system security features that depend on hardware-backed key protection. Technicians should verify that the TPM is enabled and available in firmware when troubleshooting encryption or security features that require TPM support.

Question 94.

Which component provides electrical power to internal computer hardware?

1. Motherboard
2. Power supply unit
3. Heat sink
4. Network adapter

Correct Answer: 2

Explanation:

The power supply unit, or PSU, converts incoming AC power into regulated DC voltages required by computer components. It supplies power through different connectors to the motherboard, processor, storage devices, graphics cards, and other hardware. The motherboard distributes power to many components but does not convert incoming AC electricity itself. A heatsink dissipates heat, while a network adapter provides network connectivity. When replacing a PSU, technicians should verify total wattage, connector availability, efficiency requirements, physical form factor, and sufficient capacity for the system’s peak power demands.

Question 95.

Which wireless technology uses a SIM or eSIM for cellular service?

1. WWAN
2. WLAN
3. Bluetooth
4. Zigbee

Correct Answer: 1

Explanation:

WWAN provides wide-area wireless connectivity through cellular networks and commonly uses a physical SIM or eSIM for subscriber authentication. Laptops with integrated WWAN capabilities can connect to cellular services without depending on nearby Wi-Fi. WLAN refers to local wireless networking, Bluetooth supports short-range device connections, and Zigbee is designed for low-power personal and IoT networking. When configuring WWAN, technicians should verify carrier support, device compatibility, SIM or eSIM activation, supported cellular bands, and the availability of an appropriate cellular signal.

Question 96.

Which display specification indicates how often an image refreshes each second?

1. Resolution
2. Refresh rate
3. Pixel density
4. Color depth

Correct Answer: 2

Explanation:

Refresh rate indicates how many times a display updates its image per second and is commonly measured in hertz. Higher refresh rates can produce smoother motion in supported applications, particularly gaming and video playback. Resolution specifies the number of pixels, pixel density describes how closely pixels are packed, and color depth describes the number of colors or shades that can be represented. When configuring a high-refresh-rate monitor, technicians should verify that the graphics adapter, cable, display interface, and monitor all support the desired refresh rate at the selected resolution.

Question 97.

Which port is traditionally associated with remote desktop connections?

1. 22
2. 3389
3. 53
4. 443

Correct Answer: 2

Explanation:

TCP port 3389 is traditionally associated with Microsoft Remote Desktop Protocol, commonly called RDP. It allows authorized users to remotely access Windows systems through a graphical session. Port 22 is commonly associated with SSH, port 53 with DNS, and port 443 with HTTPS. When troubleshooting remote desktop connectivity, technicians should verify that the service is enabled, the destination computer is reachable, firewall rules permit the connection, and appropriate authentication is configured. Exposing remote-access services to untrusted networks should also be carefully controlled.

Question 98.

Which component detects fingerprints for biometric authentication?

1. Proximity sensor
2. Fingerprint reader
3. Ambient sensor
4. Accelerometer

Correct Answer: 2

Explanation:

A fingerprint reader captures and analyzes fingerprint characteristics for biometric authentication. It may be integrated into a laptop, smartphone, keyboard, or dedicated security device. A proximity sensor detects nearby objects, an ambient sensor measures surrounding light, and an accelerometer detects movement or orientation. Biometric authentication is generally used alongside or within broader authentication systems rather than being treated as a universal replacement for every security mechanism. Technicians should ensure the fingerprint reader is recognized by the operating system, has appropriate drivers or software, and is configured for authorized users.

Question 99.

Which connector commonly carries analog stereo audio?

1. 3.5mm TRS
2. RJ45
3. USB-B
4. DVI-D

Correct Answer: 1

Explanation:

A 3.5mm TRS connector is widely used for analog stereo audio connections such as headphones, speakers, and line-out devices. TRS stands for Tip, Ring, and Sleeve, with the connector configuration supporting multiple electrical contacts. RJ45 is commonly used for Ethernet, USB-B connects certain computer peripherals, and DVI-D provides digital video. When troubleshooting analog audio, technicians should verify the selected output device, volume level, connector seating, cable condition, and whether the correct audio jack is being used.

Question 100.

Which device converts AC power to DC power for portable electronics?

1. AC adapter
2. Network switch
3. KVM switch
4. Surge strip

Correct Answer: 1

Explanation:

An AC adapter converts electrical power from an AC outlet into the DC voltage required by compatible electronic equipment. Laptop chargers are common examples, supplying regulated DC power to the computer and often charging its internal battery at the same time. A network switch manages network connectivity, a KVM switch controls multiple computers through shared peripherals, and a surge strip provides multiple outlets and may offer surge protection. Technicians should always use an adapter with compatible voltage, current capacity, connector polarity, and manufacturer specifications to avoid equipment damage.