[2025年05月10日]220-1101試験問題集でCompTIA練習テスト問題 [Q63-Q88]

[2025年05月10日]220-1101試験問題集でCompTIA練習テスト問題

最新でリアルな220-1101試験問題集解答

CompTIA A+認定試験：コア1（220-1101）は、業界で最も広く認知されているIT認定試験の1つです。この試験は、ハードウェア、ネットワーキング、モバイルデバイス、セキュリティ、トラブルシューティングなどの分野で、エントリーレベルのITプロフェッショナルの知識とスキルをテストするために設計されています。この試験は、CompTIA A +認定の2つの必須試験の最初の試験であり、ITサポートのキャリアを追求したい個人を対象としています。

質問 # 63
An IT manager is requesting that the company buy new cables to be used with F-type connectors that are already in-house. Which of the following cables should the company buy?

A. Plenum
B. Coaxial
C. Fiber
D. Cat 5e

正解：B

解説：
F-type connectors are commonly used to conduct an electrical signal to TV sets, cable modems.
Can be paired with: RG6 cables. RG59 cables, which are coaxial based.

質問 # 64
A user receives the following error when trying to reboot a computer:

Which of the following is the MOST likely cause of this error message?

A. Corrupted bootloader
B. Faulty RAID controller
C. Incorrect storage device driver
D. Failed hard drive

正解：D

解説：
The error message "Reboot and Select Proper Boot Device" indicates that the computer cannot find the boot device that contains the operating system12. This can happen if the hard drive that stores the operating system is damaged or failed, and the BIOS cannot detect it or read from it23. A failed hard drive can also cause other symptoms such as clicking noises, corrupted files, or slow performance4.

質問 # 65
A graphic designer wants to purchase a laptop that provides the most accurate color spectrum available when viewed from as many different angles as possible. Which is the following display types would best meet the graphic designer's requirements?

A. OLED
B. LCD
C. VGA
D. Plasma

正解：A

解説：

Explore
The correct answer is C. OLED.
OLED stands for Organic Light-Emitting Diode, and it is a type of display technology that uses organic compounds to create light and color. Unlike LCD (Liquid Crystal Display) or Plasma displays, OLED does not require a backlight or a filter to produce images. This means that OLED can offer higher contrast, wider color gamut, and better viewing angles than other display types.
LCD displays use liquid crystals that are sandwiched between two polarizing filters and illuminated by a backlight. The liquid crystals can change their orientation and block or allow light to pass through the filters.
LCD displays can have different panel types, such as IPS (In-Plane Switching), VA (Vertical Alignment), or TN (Twisted Nematic), which affect the color accuracy, response time, and viewing angles of the display.
Plasma displays use gas-filled cells that are electrically charged to create plasma, which emits ultraviolet light. The ultraviolet light then excites phosphors that emit visible light and color. Plasma displays can produce deep blacks and high contrast, but they are also prone to image retention, screen burn-in, and high power consumption.
VGA stands for Video Graphics Array, and it is not a display type but a video interface standard that was introduced in 1987. VGA can transmit analog signals from a computer to a monitor, but it has low resolution and limited color depth compared to modern digital standards such as HDMI or DisplayPort.
Therefore, OLED is the best display type for graphic designers who want the most accurate color spectrum and the widest viewing angles. OLED displays can also be thinner and lighter than LCD or Plasma displays, which makes them ideal for laptops. However, OLED displays are also more expensive and less durable than other display types, and they may suffer from image retention or burn-in over time.

質問 # 66
Which of the following protocols can be used to securely access a remote network to troubleshoot various devices?

A. SSH
B. FTP
C. TFTP
D. RDP

正解：A

解説：
Secure Shell (SSH) is a protocol used to securely access and manage devices over a network. It provides a secure channel over an unsecured network in a client-server architecture, enabling technicians to perform troubleshooting and management tasks remotely with encryption to ensure the security of the data transmitted.
FTP and TFTP are used for file transfers and do not inherently provide the same level of security or direct device management capabilities. RDP is used for remote desktop connections but is not as universally applicable for various devices as SSH.
References:
* CompTIA A+ Core 1 Exam Objectives Section 2.1: Compare and contrast Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports, protocols, and their purposes.

質問 # 67
The Wi-Fi network in the office is experiencing slow connection speeds. Which of the following should the technician check first on the access point?

A. Security settings
B. Location
C. Firmware version
D. Transmit power settings

正解：D

解説：
Explanation
The transmit power settings of the access point determine how strong the Wi-Fi signal is. If the transmit power is too low, the Wi-Fi network will have slow connection speeds and poor coverage. If the transmit power is too high, the Wi-Fi network will interfere with other nearby networks and devices, causing congestion and performance issues. Therefore, the technician should check the transmit power settings first and adjust them to an optimal level for the office environment.
References:
*8 Reasons Why Your Internet is Slow (and How to Fix It), section "You have weak Wi-Fi signals".
*6 Things Slowing Down Your Wi-Fi (And What to Do About Them) - How-To Geek, section "Channel Congestion Dings Wi-Fi Performance".

質問 # 68
A user acquired a new workstation and is attempting to open multiple targe Excel files simultaneously. The user is not experiencing the expected performance when executing such large requests. Which of the following should a technician do FIRST?

A. Increase the swap partition.
B. Upgrade the power supply in the workstation.
C. Upgrade the CPU in the workstation.
D. Upgrade the RAM in the workstation.

正解：A

解説：
Opening multiple large Excel files simultaneously requires a large amount of RAM. Upgrading the RAM in the workstation should improve performance.

質問 # 69
A user takes a tablet to a technician because the cursor on it keeps drifting. The technician notices the screen does not appear to be damaged. Which of the following is the most likely cause of the cursor issue?

A. The screen needs to be recalibrated.
B. The screen is physically damaged.
C. The touch-pen battery is depleted.
D. The screen rotation is incorrect.

正解：A

解説：
The screen needs to be recalibrated. The cursor drift is a common symptom of a misaligned touch screen, which can be caused by physical shocks, temperature changes, or software updates. The screen can be recalibrated using the tablet's settings or a utility program. The screen is not physically damaged, as there is no visible crack or break. The screen rotation is not related to the cursor drift, as it only affects the orientation of the display. The touch-pen battery is not relevant, as the cursor drift occurs even without using the pen.

質問 # 70
Which of the following frequency bands do 802.11b and 802.11g operate in?

A. 2.4GHz
B. 5GHz
C. 1GHz
D. 6GHz

正解：A

解説：
The frequency bands that 802.11b and 802.11g operate in are 2.4GHz bands, which allow for longer range but lower speed than higher frequency bands such as 5GHz or 6GHz bands used by newer standards such as 802.11a/n/ac/ax.

質問 # 71
A user's laptop has been slow to respond for the past few days. The user has run a virus scan, deleted temporary files, closed unnecessary programs, and rebooted the laptop, but the issue persists. Which of the following steps should the technician take next?

A. Run a firmware update.
B. Perform a RAM upgrade.
C. Bench test the laptop.
D. Replace the laptop's hard drive.

正解：A

解説：
Explanation
Firmware is a type of software that controls the hardware components of a device, such as the motherboard, hard drive, or keyboard. Firmware updates can improve the performance, stability, and compatibility of the device, as well as fix bugs and security issues. Running a firmware update can help to resolve the issue of a slow laptop, especially if the firmware is outdated or corrupted.

質問 # 72
A user reports intermittent connectivity. The technician checks the network logs and sees the following output:

Which of the following is the most likely reason for this issue?

A. High latency
B. Port flapping
C. Jitter
D. External interference

正解：B

解説：
Port flapping, or link flapping, occurs when a switch's port state goes up and down repeatedly in a short amount of time. It can be caused by bad cables or link synchronization issues.

質問 # 73
A technician has verified full system functionality and implemented preventive measures. Which of the following represents the NEXT step the technician should take according to the best practice methodology?

A. Perform a format and system restore.
B. Refer to the vendor's instructions for guidance.
C. Establish a theory of probable cause.
D. Document the findings, actions, and outcomes.

正解：D

解説：
The CompTIA troubleshooting methodology:
1. Identify the problem
2. Establish a theory of probable cause
3. Test the theory to determine the cause
4. Establish a plan of action to resolve the problem and implement the solution
5. Verify full system functionality, and, if applicable, implement preventive measures
6. Document findings, actions and outcomes
https://www.comptia.org/blog/troubleshooting-methodology

質問 # 74
A user reports that a new brand of paper works well in all but one printer in the office. For that printer, the paper seems to be too heavy or too thick to feed in from the printer tray. Which of the following will correct the print issues?

A. Changing the printer spooler settings
B. Increasing the corona wire voltage
C. Using OEM-branded paper for this printer
D. Replacing the printer pickup rollers

正解：D

質問 # 75
A customer reports that a printer is only printing misaligned images. Which of the following should the technician do to correct the issue?

A. Replace the ink cartridge.
B. Scan the document.
C. Clean the print heads.
D. Perform a calibration.

正解：D

解説：
Explanation
Calibration is the process of adjusting the printer settings to ensure that the printed output matches the original document. Calibration can fix issues such as misaligned images, color accuracy, and print quality. References: [Printer Calibration]

質問 # 76
A company recently enabled two-factor authentication in order to enhance security. Users should be prompted for two-factor authentication when working outside of the office, but are also being prompted when connecting to the office Wi-Fi. Which of the following should the technician do?

A. Substitute hard tokens in place of soft tokens.
B. Leave the current rules in place and disable Wi-Fi on all devices.
C. Remove two-factor authentication from the users' accounts.
D. Implement allow listing and add the office IP address as an exception.

正解：D

解説：
Allow listing is a security technique that allows only specific IP addresses or domains to access a network or a service. By adding the office IP address as an exception, the company can prevent two-factor authentication from being triggered when users are connected to the office Wi-Fi, since the office network is considered trusted. This way, users will only be prompted for two-factor authentication when working outside of the office, which enhances security.
Reference:
What Is Two-Factor Authentication (2FA)? | Microsoft Security: This article explains the concept of two-factor authentication, its benefits, and its methods.
Change your two-step verification method and settings - Microsoft Support: This article shows how to manage your security verification methods and settings for your work or school account, including how to turn on two-factor verification prompts on a trusted device.
2FA Directory: This website lists all the sites that support two-factor authentication, and the methods they use.

質問 # 77
A technician is monitoring all outbound traffic in a SOHO. Which of the following is the MOST cost-effective solution to monitor the traffic?

A. Network tap
B. Spectrum analyzer
C. Lookback plug
D. Toner probe

正解：A

解説：
A network tap is used to intercept the signals passing over a cable and send them to a packet or protocol analyzer. Taps are either powered or unpowered:

質問 # 78
An employee is on a business trip and needs to upload daily conferences and meetings to the company's intranet. The uploading process is successful but was faster in the past. Which of the following is the most likely reason for the slowdown?

A. Data is being throttled.
B. Wireless is turned off.
C. 5G is disabled.
D. Roaming is turned on.

正解：A

解説：
Data throttling, often implemented by network providers to manage bandwidth usage, can slow data speeds after a certain usage limit is reached. Turning off wireless would prevent uploads, while roaming and 5G status primarily affect connectivity rather than speed throttling. CompTIA A+ Core 1 objectives cover connectivity troubleshooting for mobile devices, including factors impacting network speed and performance.

質問 # 79
Several users who share a multifunction printer in an office have reported unintended, thin, vertical lines that cover the entire height of every page printed from the printer. Which of the following steps should a technician complete in order to MOST likely resolve this issue?

A. Clear the print spooler on each computer.
B. Perform the drum-cleaning procedure.
C. Replace the printer paper with a new ream.
D. Reinstall the printer driver on each computer

正解：B

解説：
Thin, vertical lines on every printed page are usually caused by a dirty drum or toner cartridge. Performing the drum-cleaning procedure will likely resolve the issue. Reference: CompTIA A+ Certification Exam Guide, Ninth Edition, Chapter 18

質問 # 80
A customer is using a satellite internet connection that is experiencing slowness. A technician notices high latency while pinging, but the download test is performing perfectly with very good download speeds. Which of the following represents the NEXT action the technician should perform?

A. Replace the modem because it is not working correctly based on the test result.
B. Guide the customer on how to upgrade the internet plan with the provider in order to improve latency.
C. Explain to the customer this is not an issue; this situation is normal for this type of internet connection.
D. Restart the modem and run an online internet connection and speed diagnostic tool.

正解：D

解説：
Explanation
The technician should restart the modem and run an online internet connection and speed diagnostic tool1
. High latency is a common issue with satellite internet connections, and it can cause slow internet speeds2
. Restarting the modem can help to resolve the issue1. The technician should also run an online internet connection and speed diagnostic tool to check the connection and speed1. Guiding the customer on how to upgrade the internet plan with the provider in order to improve latency is not likely to be the correct option2.
High latency while pinging can indicate a problem with the modem or the connection between the modem and the satellite. Restarting the modem can often resolve connectivity issues. Running an online internet connection and speed diagnostic tool can help identify any other issues with the connection. Upgrading the internet plan may not resolve latency issues and may not be necessary if the download test is performing perfectly with very good download speeds. High latency is not normal for satellite internet connections, so replacing the modem based on this one test result is premature. References: CompTIA A+ Certification Exam:
Core 1 - Page 102

質問 # 81
A technician is upgrading a computer OS from Windows 7 to Windows 10. During the OS installation, the system is not able to find the hard drive. Which of the following can the technician do to MOST likely fix the issue?

A. Upgrade the RAM modules.
B. Load the HDD drivers using a flash drive.
C. Change the partition to MBR
D. Replace the hard drive.

正解：B

解説：
Loading the hard disk drive (HDD) drivers using a flash drive is the most likely action that can fix the issue of a computer not being able to find the hard drive during an OS installation from Windows 7 to Windows 10.
The HDD may have a different interface or controller than what Windows 10 supports by default, such as SATA or RAID, which would require loading additional drivers during the installation process. The technician can use a flash drive to load the drivers from another device or source. Changing the partition to MBR, upgrading the RAM modules, or replacing the hard drive are not likely to fix the issue, as they are not related to the HDD drivers

質問 # 82
Which of the following BEST describes a lab environment in which virtual machines can be created, rebooted, and shut down without affecting the production network?

A. SCADA
B. Sandbox
C. Hybrid cloud
D. Honeypot

正解：B

解説：
A sandbox is a lab environment in which virtual machines can be created, rebooted, and shut down without affecting the production network. This allows for testing and experimentation without the risk of damaging the production environment.

質問 # 83
An office manager reports that a printer is experiencing performance issues. Printouts are smudging when they are handled, and. recently, whenever the manager tries to print oversized documents, the paper jams before anything is printed on it.

正解：

解説：

質問 # 84
A technician is upgrading a faulty motherboard that was ordered by an end user for an old, high-end desktop computer. However, the technician is unable to install the CPU into the socket. Upon closer inspection, the technician notices the pins on the CPU do not line up with the socket. Which of the following would be the best course of action for the technician to take NEXT?

A. Verify the socket type and manufacturer.
B. Find a compatible motherboard for the CPU.
C. Install an adaptor to create a universal socket.
D. Try to set as many pins as possible.

正解：A

解説：
you need to know the socket type before you can go and find the replacement motherboard

質問 # 85
A mechanical engineer's PC has started randomly shutting off whenever the engineer attempts to render a design. The mechanical engineer states that the PC has worked for three years without issue. Which of the following should the technician perform first to diagnose the issue? (Select two).

A. Check if the computer is overheating.
B. Check if the graphics card is compatible with the motherboard.
C. Reinstall the operating system.
D. Listen for POST beeps when turning on the PC.
E. Run chkdsk.
F. Replace the HDD.

正解：A、D

解説：
The mechanical engineer's PC shutting off during resource-intensive tasks like rendering could be caused by overheating or hardware issues. The two most logical steps to diagnose the problem are:
* B. Check if the computer is overheating: Rendering is a CPU- and GPU-intensive task that generates heat. Overheating could cause the system to shut down as a protective measure. Checking the system's temperature can help identify if this is the cause.
* A. Listen for POST beeps when turning on the PC: POST (Power-On Self-Test) beeps can indicate hardware issues, such as with the motherboard, CPU, or GPU. Listening for beeps can help identify potential problems with these components.
Why the other options are incorrect:
* C. Run chkdsk: This tool is used for checking disk integrity, but the symptoms don't suggest a hard drive issue.
* D. Reinstall the operating system: Reinstalling the OS is a time-consuming step and not typically necessary for hardware-related shutdowns.
* E. Check if the graphics card is compatible with the motherboard: If the PC has been working for three years, the GPU is already compatible with the motherboard.
* F. Replace the HDD: There's no indication that the hard drive is causing the issue, as the problem occurs during rendering, which is more GPU/CPU-intensive.
This topic falls under the Hardware Troubleshooting domain in the CompTIA A+ Core 1 exam.

質問 # 86
Which of the following should a technician use in DNS to map a device to an IPv6 address?

A. AAAA
B. MX
C. CNAME
D. A

正解：A

解説：
In DNS (Domain Name System), the AAAA record is used to map a domain or device to an IPv6 address. IPv6 addresses are 128-bit addresses, and the AAAA record is specifically designed for handling these larger addresses.
C : This record is used to associate a hostname with an IPv6 address in DNS.
Why the other options are incorrect:
A : An A record maps a domain to an IPv4 address, not an IPv6 address.
B : A CNAME (Canonical Name) record is used to alias one domain name to another but does not map to an IP address directly.
D : An MX (Mail Exchange) record is used to direct email traffic to the correct email servers, not to map devices to IP addresses This falls under the Networking domain of the CompTIA A+ Core 1 exam.

質問 # 87
A user submitted a support ticket that states all of the printouts from a laser printer appear to have double images imposed on them. A review of past printer support tickets shows that maintenance kit has not been installed in more than a year. Which of the following printer consumables is MOST likely causing the issue?