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

 

Question 201.

Which connector is commonly used for internal floppy drives?

1. SATA
2. Molex
3. Berg
4. EPS12V

Correct Answer: 3

Explanation:

The Berg connector was commonly used to provide power to internal floppy disk drives in older computer systems. It is smaller than the Molex connector traditionally used for various internal peripherals. SATA power connectors are used with modern SATA storage devices, while EPS12V connectors provide dedicated processor power. Although floppy drives are now largely obsolete, technicians may encounter Berg connectors when maintaining legacy systems. Recognizing older power connectors helps prevent incorrect connections and makes it easier to identify compatible components during hardware repair or restoration projects involving older computers.

Question 202.

Which component temporarily holds data waiting for CPU processing?

1. RAM
2. ROM
3. SSD
4. Optical disc

Correct Answer: 1

Explanation:

RAM provides temporary working space for data and instructions that the processor needs during active operations. When applications run, their required data is loaded into RAM so the CPU can access it much faster than retrieving information directly from persistent storage. ROM stores nonvolatile firmware information, an SSD provides long-term storage, and optical discs provide removable storage. RAM is volatile, so its contents are normally lost when power is removed. Technicians should consider available memory capacity when diagnosing slow multitasking, excessive paging, or application performance problems.

Question 203.

Which connector commonly carries digital audio and video from a computer?

1. RJ11
2. PS/2
3. HDMI
4. Serial

Correct Answer: 3

Explanation:

HDMI is a digital interface designed to carry both audio and video through a single connection. It is commonly found on computers, televisions, monitors, projectors, and home theater equipment. RJ11 is generally associated with telephone connections, PS/2 is a legacy peripheral interface, and serial ports support older serial communication devices. Different HDMI versions can support different resolutions, refresh rates, audio formats, and other capabilities. Technicians should verify that the source device, display, and cable provide the capabilities required for the intended multimedia configuration.

Question 204.

Which memory technology retains data without continuous electrical power?

1. DRAM
2. SRAM
3. Cache
4. Flash memory

Correct Answer: 4

Explanation:

Flash memory is nonvolatile, meaning it can retain stored information even when electrical power is removed. It is widely used in SSDs, USB flash drives, memory cards, and firmware storage. DRAM requires continuous power to retain its contents, while SRAM is also volatile despite being faster and commonly used for processor cache. Flash memory uses electronic cells rather than moving mechanical parts, making it suitable for compact and durable storage. Technicians should recognize flash storage when comparing solid-state technologies with traditional magnetic storage devices.

Question 205.

Which device provides centralized wireless authentication for network clients?

1. RADIUS server
2. File server
3. Print server
4. DNS resolver

Correct Answer: 1

Explanation:

A RADIUS server provides centralized authentication, authorization, and accounting services for compatible network access systems. It is commonly used with enterprise wireless networks to authenticate users before granting network access. A file server provides shared storage, a print server manages printing resources, and a DNS resolver handles name-resolution requests. RADIUS can work with wireless infrastructure and other network-access systems to centralize authentication policies. Technicians working with enterprise Wi-Fi should understand the relationship between access points, authentication servers, credentials, and encryption configurations.

Question 206.

Which cable is commonly used for digital optical network connections?

1. Cat 6
2. Fiber-optic cable
3. RG-59
4. Coaxial patch cable

Correct Answer: 2

Explanation:

Fiber-optic cable transmits information using pulses of light rather than electrical signals. It provides high bandwidth and is resistant to electromagnetic interference, making it useful for backbone connections, long-distance networking, and high-speed infrastructure. Cat 6 is copper twisted-pair cabling, while RG-59 and other coaxial cables use electrical signaling through a central conductor. Technicians working with fiber should identify the appropriate connector, transceiver, cable type, and wavelength requirements. Fiber installations also require careful handling because excessive bending or contamination can degrade signal performance.

Question 207.

Which component converts digital computer data into analog telephone signals?

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

Correct Answer: 1

Explanation:

A modem performs modulation and demodulation, allowing digital computer information to communicate across certain analog-oriented communication systems. Traditional dial-up modems converted digital information into signals suitable for telephone lines and converted received signals back into digital data. A switch forwards frames between network devices, a router forwards packets between networks, and a repeater regenerates signals. Although modern broadband technologies differ considerably from traditional dial-up, understanding the modem’s basic signal-conversion role remains important for CompTIA A+ networking concepts and troubleshooting.

Question 208.

Which display technology uses a backlight behind liquid crystals?

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

Correct Answer: 3

Explanation:

LCD displays use liquid crystals to control how light passes through each pixel, with a backlight providing the illumination. Modern LCD panels commonly use LED-based backlighting, although the underlying display technology remains LCD. OLED panels generate light at the pixel level, plasma displays use electrically excited gas cells, and CRT displays use electron beams directed toward phosphors. Technicians should distinguish display technology from backlight technology because an LED-backlit LCD is still an LCD display. Understanding these differences helps when diagnosing display specifications and hardware characteristics.

Question 209.

Which network cable uses four twisted copper pairs?

1. Coaxial
2. Twisted-pair Ethernet
3. Fiber optic
4. Telephone ribbon

Correct Answer: 2

Explanation:

Twisted-pair Ethernet cables commonly contain four twisted copper pairs. The twisting helps reduce electromagnetic interference and crosstalk between conductors. Categories such as Cat 5e, Cat 6, and Cat 6a use twisted-pair construction for Ethernet networking. Coaxial cable uses a central conductor surrounded by insulation and shielding, fiber-optic cable transmits light, and telephone ribbon cable uses a different construction. Technicians should recognize cable categories and termination standards when installing network infrastructure because cable quality and installation practices can affect achievable network speeds.

Question 210.

Which technology automatically adjusts screen brightness based on surrounding light?

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

Correct Answer: 3

Explanation:

An ambient light sensor measures surrounding light levels and allows a computer or mobile device to adjust display brightness automatically. This can improve viewing comfort and may help reduce unnecessary power consumption in portable systems. A proximity sensor detects nearby objects, an accelerometer detects movement and orientation, and a fingerprint sensor captures biometric characteristics. Ambient light sensors are commonly found in laptops, tablets, and smartphones. Technicians troubleshooting automatic brightness should check sensor availability, operating-system settings, device drivers, and power-management configuration.

Question 211.

Which storage feature monitors drive health and predicts potential failures?

1. SMART
2. TRIM
3. RAID
4. ECC

Correct Answer: 1

Explanation:

SMART, or Self-Monitoring, Analysis and Reporting Technology, monitors various storage-device attributes and can report indicators associated with potential drive problems. It may provide information about errors, operating conditions, and other health-related metrics. TRIM helps SSDs manage unused blocks, RAID organizes multiple storage devices, and ECC provides error detection or correction in supported memory and storage contexts. SMART does not guarantee that a drive will predict every failure, but it provides useful diagnostic information. Technicians can use SMART data alongside other symptoms when evaluating storage health.

Question 212.

Which wireless security standard provides stronger protection than WPA2?

1. WEP
2. WPA
3. WPA3
4. Open authentication

Correct Answer: 3

Explanation:

WPA3 is a newer Wi-Fi security standard designed to provide stronger protection than earlier wireless security methods such as WEP and WPA. WPA3 introduces improved authentication and security mechanisms, including stronger protections for password-based access in supported configurations. WEP is an outdated security technology with significant weaknesses, while WPA is an earlier generation of wireless security. Open authentication does not provide encryption by itself. Technicians configuring wireless networks should verify that access points and client devices support the selected security mode and should use modern security settings whenever possible.

Question 213.

Which component converts AC power into multiple DC output voltages?

1. PSU
2. GPU
3. UPS battery
4. Voltage sensor

Correct Answer: 1

Explanation:

A power supply unit, or PSU, converts incoming AC electrical power into regulated DC voltages required by computer components. Different outputs can supply the motherboard, processor, storage devices, fans, and expansion cards. A GPU performs graphics processing, a UPS battery provides backup energy during power interruptions, and a voltage sensor measures electrical conditions. Technicians should select a PSU based on system power requirements, efficiency, connector availability, physical form factor, and appropriate electrical specifications. An inadequate or failing PSU can produce instability, shutdowns, or failure to start.

Question 214.

Which protocol is commonly used to access files on a Windows network?

1. SMB
2. SMTP
3. POP3
4. SNMP

Correct Answer: 1

Explanation:

Server Message Block, or SMB, is commonly used for file and printer sharing on Windows-based networks. It allows compatible systems to access shared folders, files, printers, and other network resources. SMTP is used for sending email, POP3 is used for retrieving email, and SNMP is commonly used for network management and monitoring. Technicians troubleshooting Windows file sharing should consider permissions, network connectivity, share configuration, authentication, firewall settings, and SMB compatibility. Proper access controls are also important because shared resources may contain sensitive information.

Question 215.

Which device converts a digital signal into a physical printout?

1. Scanner
2. Printer
3. Webcam
4. Microphone

Correct Answer: 2

Explanation:

A printer produces physical output from digital documents, images, or other computer-generated information. Common printer technologies include laser, inkjet, thermal, and impact printing. A scanner captures physical documents and converts them into digital information, while webcams capture video and microphones capture audio. Technicians should identify the printer technology before troubleshooting issues because each design uses different consumables and mechanisms. Printer problems can involve drivers, connectivity, paper handling, toner or ink, imaging components, or print queues. Correct maintenance procedures help maintain reliable output quality.

Question 216.

Which expansion technology connects high-speed peripherals directly to the motherboard?

1. PCIe
2. IDE
3. PATA
4. ISA

Correct Answer: 1

Explanation:

PCI Express, or PCIe, is a high-speed expansion interface used to connect components such as graphics cards, network adapters, storage controllers, and other expansion devices to the motherboard. It uses dedicated serial lanes that can be combined to provide different bandwidth levels. IDE and PATA are legacy storage interfaces, while ISA is an older expansion-bus technology. PCIe slots are available in different physical sizes and lane configurations. Technicians should verify card compatibility, available slot type, lane requirements, and motherboard support before installing a PCIe expansion device.

Question 217.

Which technology allows a laptop to connect through a mobile carrier’s network?

1. WLAN
2. WWAN
3. PAN
4. LAN

Correct Answer: 2

Explanation:

WWAN, or Wireless Wide Area Network, enables compatible laptops and mobile computers to connect to cellular networks operated by mobile carriers. A WWAN adapter may use technologies such as LTE or 5G depending on the hardware and service plan. WLAN generally refers to local Wi-Fi networking, PAN describes a personal-area network, and LAN describes a local wired or wireless network. Technicians should verify modem compatibility, carrier support, SIM or eSIM requirements, antenna connections, and installed drivers when configuring WWAN connectivity.

Question 218.

Which protocol is commonly used to securely browse websites?

1. HTTP
2. HTTPS
3. FTP
4. Telnet

Correct Answer: 2

Explanation:

HTTPS uses HTTP over a secure cryptographic connection, typically provided through TLS. It helps protect information exchanged between a web browser and a website from interception and tampering. Standard HTTP does not provide the same transport encryption, FTP is primarily used for file transfers, and Telnet provides remote terminal communication without modern transport encryption. Technicians should recognize HTTPS when troubleshooting certificate warnings, secure website access, or encrypted web communications. Proper certificate validation is important because encryption alone does not guarantee that a user is communicating with the intended website.

Question 219.

Which device allows several computers to share one Internet connection?

1. Router
2. Monitor
3. KVM
4. Printer server

Correct Answer: 1

Explanation:

A router can allow multiple devices on a local network to share an Internet connection. Many consumer routers combine routing with functions such as NAT, DHCP, firewall filtering, and wireless access. A monitor displays visual output, a KVM switch shares keyboard, video, and mouse resources among computers, and a print server manages shared printing. When configuring Internet sharing, technicians should verify WAN connectivity, LAN addressing, DHCP settings, DNS configuration, and appropriate security controls. Understanding the router’s role helps distinguish local networking functions from Internet service provider equipment.

Question 220.

Which component reduces electrical noise on a computer power connection?

1. Surge protector
2. EMI filter
3. CPU fan
4. Thermal compound

Correct Answer: 2

Explanation:

An electromagnetic interference, or EMI, filter reduces unwanted electrical noise that can travel through power connections. It helps limit interference that could affect sensitive electronic equipment or other devices connected to the electrical system. A surge protector is designed primarily to limit voltage spikes, a CPU fan removes heat, and thermal compound improves heat transfer between components and cooling surfaces. EMI filtering is commonly incorporated into power supplies and other electronic equipment. Technicians should understand that electrical noise, surges, and thermal problems are different issues requiring different forms of protection or mitigation.