220-1101無料認定試験材料はこちらの870問題
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質問 # 239
A technician is trying to fix a computer that fails to boot even when all the RAM is removed. Which of the following should the technician do next to troubleshoot the issue?
- A. Check to see if the HDD power connectors are well seated
- B. Inspect the motherboard for swollen capacitors.
- C. Replace the CMOS battery_
- D. Swap the power supply if it is inoperable.
正解：D
解説：
Explanation
The next step that the technician should do to troubleshoot the issue is C. Swap the power supply if it is inoperable.
A power supply is a device that converts the alternating current (AC) from the wall outlet into direct current (DC) that the computer components can use. A power supply is essential for the computer to boot and function properly. A faulty or inadequate power supply can cause various issues, such as no power, no display, random shutdowns, or beeping sounds.
In this scenario, the technician is trying to fix a computer that fails to boot even when all the RAM is removed.
RAM stands for Random Access Memory, and it is a type of memory that stores data and instructions for the processor to access and process. RAM is also essential for the computer to boot and function properly. A faulty or incompatible RAM can cause various issues, such as no boot, no display, blue screen, or beeping sounds.
One of the basic troubleshooting techniques for a computer that fails to boot is to remove all the RAM modules and try to boot with one module at a time in different slots. This can help to identify if the problem is caused by a bad RAM module or a bad RAM slot. If the computer still fails to boot even when all the RAM is removed, it means that the problem is not related to the RAM, but to another component.
The next step that the technician should do is to swap the power supply if it is inoperable. This means that the technician should test the power supply with a multimeter or a power supply tester, and replace it with a known good one if it is faulty or insufficient. This can help to determine if the problem is caused by a bad power supply or a bad motherboard.
The other options are not the next steps that the technician should do, because they are less likely or less effective. Inspecting the motherboard for swollen capacitors (option A) may be helpful if the problem is caused by a damaged or defective motherboard, but it requires opening the computer case and visually examining the motherboard components. Replacing the CMOS battery (option B) may be necessary if the problem is caused by a low or dead CMOS battery, but it usually affects only the BIOS settings and not the boot process. Checking to see if the HDD power connectors are well seated (option D) may be useful if the problem is caused by a loose or faulty HDD connection, but it usually affects only the data access and not the boot process.
For more information about troubleshooting power supply and boot issues, you can refer to the following web search results: [How to Troubleshoot a Computer That Won't Turn On], [How to Test a Power Supply Using a Multimeter], [How to Fix a Computer That Shows No Sign of Power], [How to Troubleshoot Beep Codes].
質問 # 240
A technician is receiving reports that the entire office sporadically loses network connectivity throughout the day. The technician determines the root cause to be EMI. Which of the following cable mediums would be the MOST cost effective without sacrificing system performance?
- A. Coaxial
- B. Plenum Cat 5e
- C. Shielded Cat 6
- D. Multimode fiber
正解：C
解説：
In this situation, the MOST cost-effective cable medium that would not sacrifice system performance would be B. Shielded Cat 6. Electromagnetic interference (EMI) can disrupt network connectivity by interfering with the signals transmitted over network cables. Shielded Cat 6 cables are designed to provide protection against EMI by incorporating a layer of shielding material around the cable's conductors. This shielding helps to prevent EMI from interfering with the signals transmitted over the cable.
質問 # 241
A technician just finished building a new PC and needs to install a firmware update for the system board UEFI. The technician is experiencing issues while accessing the USB key. Which of the following features should the technician most likely disable in order to complete this task?
- A. USB 3.0 support
- B. PXE boot capability
- C. Secure Boot
- D. TPM security
正解：C
解説：
When experiencing issues accessing a USB key for a firmware update, particularly in relation to system board UEFI updates, the Secure Boot feature should be considered. Secure Boot is a security standard designed to ensure that a computer boots using only software that is trusted by the PC manufacturer. If Secure Boot is enabled, it might prevent the system from recognizing or booting from the USB key if the firmware update or the USB drive is not recognized as a trusted source. Disabling Secure Boot temporarily can allow the firmware update to proceed.
Reference:
CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically the sections on UEFI/BIOS settings and configurations, including the role and configuration of Secure Boot in system security.
Understanding of UEFI/BIOS security features and their impact on system boot processes, particularly the function of Secure Boot in validating firmware and software integrity during the boot process.
質問 # 242
A technician is upgrading the Wi-Fi card on a laptop. Which of the following should the technician do first?
- A. Install card drivers.
- B. Remove the power cable.
- C. Set the physical Wi-Fi switch to disabled.
- D. Disconnect the Wi-Fi antenna cables.
正解：B
解説：
The first step a technician should take before upgrading the Wi-Fi card on a laptop, or performing any internal hardware modifications, is to remove the power cable to ensure the device is not powered on. This is a crucial safety measure to prevent any electrical damage to the laptop or the technician. It also helps in avoiding any unintended changes or data loss that might occur if the device is powered on during the upgrade process.
Reference:
CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically the hardware domain that discusses best practices for safety and the procedures to follow when upgrading or replacing internal hardware components, such as a Wi-Fi card.
General safety guidelines for performing hardware upgrades or repairs, emphasizing the importance of ensuring the device is powered off and disconnected from any power sources to avoid electrical hazards.
質問 # 243
A technician is setting up a video-editing workstation and the operating system is already installed on an internal M.2 drive.
The new workstation must meet the following requirements:
. Be able to edit files at the fastest speed
. Allow for disk failure without any downtime
Have 2TB of usable space
. Ensure the most robust fault tolerance
INSTRUCTIONS
Use the drop-down menus to select the appropriate RAID level, drive types, and drive sizes based on the requirements above. For each drive type that is selected, a corresponding drive size must also be selected.
正解：
解説：
Explanation:
Based on the requirements, the best option for the video-editing workstation is to use RAID 10 with four SATA SSDs of 1TB each. This configuration will meet the following requirements:
* Be able to edit files at the fastest speed: RAID 10 combines the advantages of RAID 0 and RAID 1, which are striping and mirroring, respectively. Striping can increase the data transfer rate by using multiple disks in parallel, while mirroring can provide redundancy and reliability by duplicating the data on another set of disks. SATA SSDs are also faster than HDDs or SSHDs, as they use flash memory instead of spinning disks, and they can offer lower latency, higher IOPS, and less noise and heat.
* Allow for disk failure without any downtime: RAID 10 can withstand up to two disk failures, as long as they are not in the same mirrored pair. If one disk fails, the data can be read from or written to the other disk in the same pair, without affecting the performance or availability of the array. The failed disk can be replaced and rebuilt without interrupting the operation of the workstation.
* Have 2TB of usable space: RAID 10 uses half of the total disk capacity for mirroring, so the usable space is equal to the size of two disks. By using four SATA SSDs of 1TB each, the total disk capacity is
4TB, and the usable space is 2TB, which meets the requirement.
* Ensure the most robust fault tolerance: RAID 10 offers the highest level of fault tolerance among the standard RAID levels, as it can survive multiple disk failures and provide fast recovery. RAID 10 also has a low overhead, as it does not use parity or checksums, which can slow down the write performance or increase the complexity of the array.
Therefore, the technician should select the following options from the drop-down menus:
* RAID level: RAID 10
* Drive type 1: SATA SSD
* Drive size 1: 1TB
* Drive type 2: SATA SSD
* Drive size 2: 1TB
* Drive type 3: SATA SSD
* Drive size 3: 1TB
* Drive type 4: SATA SSD
* Drive size 4: 1TB
* Drive type 5: SATA SSD
* Drive size 5: 1TB
質問 # 244
A technician is troubleshooting a user's laptop that randomly turns off. The technician disassembles the laptop and notices that various pieces of small sticker paper within the device have changed color from red to blue. Which of the following is the most likely cause of the laptop's issues?
- A. Swollen battery
- B. Overheating
- C. Liquid damage
- D. Broken screen
正解：C
解説：
One of the possible causes of a laptop randomly turning off is liquid damage, which can cause short circuits, corrosion, and overheating of the internal components. Liquid damage can be hard to detect, especially if the laptop has been dried or cleaned after the spill. However, one of the indicators of liquid damage is the presence of small sticker paper within the device that changes color from red to blue.
These stickers are called liquid contact indicators (LCIs), and they are designed to show if a device has been exposed to water or other liquids. LCIs are usually red when dry, but they turn blue or purple when wet. LCIs are often placed near the ports, battery, keyboard, and motherboard of laptops and other electronic devices. LCIs can help technicians diagnose liquid damage and determine if the device is covered by warranty or not.
質問 # 245
A graphic designer needs a RAID solution for design work. The solution needs to provide speed and redundancy. Which of the following RAID solutions should be installed?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
質問 # 246
A user requested upgrades to a company-issued laptop to increase its performance while working with a large database stored on drive C. Which of the following tasks should a systems administrator complete to BEST meet this goal? (Select TWO).
- A. Upgrade to 1GB NIC.
- B. Install a hybrid drive.
- C. Upgrade the power supply.
- D. Increase the RAM.
- E. Migrate to a SSD.
- F. Configure RAID 1.
正解：B、D
解説：
CompTIA covers it in page 97 of the comptia A+ complete study guide.
質問 # 247
A graphic designer wants to upgrade to the fastest possible RAM for a desktop workstation.
Which of the following types of RAM would be best for the designer to use?
- A. DDR2 SDRAM
- B. DDR4 SDRAM
- C. DDR3 SDRAM
- D. DDR5 SDRAM
正解：D
解説：
DDR5 SDRAM (Double Data Rate 5 Synchronous Dynamic Random-Access Memory) is the latest and fastest type of RAM for desktop workstations as of 2023. DDR5 SDRAM offers higher speeds, lower power consumption, greater capacity, and improved reliability than previous generations of DDR SDRAM. DDR5 SDRAM can operate at frequencies up to 8400 MHz, compared to 3200 MHz for DDR4 SDRAM, which means it can transfer data faster and more efficiently. DDR5 SDRAM also supports dual-channel memory, which allows two memory modules to work together and double the bandwidth. DDR5 SDRAM is compatible with the latest Intel and AMD processors that support the DDR5 standard.
質問 # 248
A user reports the following:
1. When accessing large images, PC performance is degraded.
2. When accessing small text files, PC performance is as expected.
Which of the following is the most likely cause of the performance issues?
- A. RAID array configuration errors
- B. Insufficient power supply
- C. HDD fragmentation
- D. RAID controller failure
正解：C
解説：
HDD fragmentation is a condition where the data on a hard disk drive (HDD) is not stored in contiguous clusters, but scattered across different physical locations on the disk. This happens when files are created, modified, or deleted over time, leaving gaps and fragments of data on the disk. HDD fragmentation can affect the performance of the PC, especially when accessing large files that require more disk operations to read or write12.
According to some web search results123, some signs and symptoms of a heavily fragmented HDD are:
* Longer load times for files and programs
* Graphics-heavy apps and games take too long to load new windows or process new environments
* Reduced disk space and efficiency
* Increased disk noise and temperature
* Accelerated disk wear and failure
To fix this issue, the user can use a tool called Disk Defragmenter, which is built-in in Windows. Disk Defragmenter rearranges the fragmented data on the HDD so that it is stored in contiguous clusters, improving the disk performance and reliability1. Disk Defragmenter can run on a schedule or manually by following these steps1:
* Open Disk Defragmenter by clicking the Start button. In the search box, type Disk Defragmenter, and then, in the list of results, click Disk Defragmenter.
* Under Current status, select the disk you want to defragment.
* To determine if the disk needs to be defragmented or not, click Analyze disk. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
* Once Windows is finished analyzing the disk, you can check the percentage of fragmentation on the disk in the Last Run column. If the number is above 10%, you should defragment the disk.
* Click Defragment disk. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
* Disk Defragmenter might take from several minutes to a few hours to finish, depending on the size and degree of fragmentation of your hard disk. You can still use your computer during the defragmentation process.
質問 # 249
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：
Explanation:
質問 # 250
Which of the following should a technician use to terminate an RJ45 port?
- A. Cable tester
- B. Cable stripper
- C. Punchdown tool
- D. Toner probe
正解：C
解説：
To terminate an RJ45 port, a technician should use a punchdown tool. This tool is specifically designed to insert and cut (terminate) the wires into a patch panel, keystone jack, or a network surface mount box. The punchdown tool ensures that the wire is properly seated in the terminal block and that the connection is secure. It also trims the excess wire during the termination process, which is not a function that cable testers, toner probes, or cable strippers are designed to perform.
質問 # 251
An organization is looking to upgrade the processing ability for its computers. Most users report that whenever multiple applications are being utilized, the system's response time slows down drastically. When only one application is open, the response time is acceptable. Which of the following should be upgraded FIRST?
- A. HDD
- B. CPU
- C. RAM
- D. SSD
正解：C
解説：
Explanation
The component that should be upgraded first is the RAM. When multiple applications are being utilized, the system's response time slows down drastically. This is because the computer is running out of memory. Upgrading the RAM will allow the computer to store more data in memory, which will improve performance when multiple applications are being used123.
質問 # 252
A help desk technician thinks a desktop PC has failed due to a defective power supply Which of the following steps should the technician take next?
- A. Conduct external or internal research based on symptoms.
- B. Inquire about environmental or infrastructure changes.
- C. Document the findings, actions, and outcomes.
- D. Establish a plan of action to resolve the problem and implement the solution.
正解：A
解説：
According to the CompTIA troubleshooting methodology, the next step after establishing a theory of probable cause is to test the theory to determine the cause. However, before testing the theory, the technician may need to conduct some research based on the symptoms and the possible cause. This may involve consulting online resources, manuals, documentation, or colleagues to find out more information about the power supply and how to test it. Research can help the technician confirm or eliminate the theory and avoid unnecessary actions or damage.
Answer A is incorrect because inquiring about environmental or infrastructure changes is part of identifying the problem, which is the first step of the troubleshooting methodology. The technician should have already done this before establishing a theory of probable cause.
Answer C is incorrect because establishing a plan of action to resolve the problem and implement the solution is the fourth step of the troubleshooting methodology. The technician should not jump to this step without testing the theory and verifying the cause.
Answer D is incorrect because documenting the findings, actions, and outcomes is the last step of the troubleshooting methodology. The technician should not do this until the problem is resolved and verified.
質問 # 253
Which of the following services allows a remote user to access network resources?
- A. VPN
- B. WLAN
- C. SAN
- D. DHCP
正解：A
解説：
A Virtual Private Network (VPN) provides secure remote access to network resources over the internet.
WLAN provides local network access, SAN is for storage networks, and DHCP manages IP address allocation. CompTIA A+ Core 1 objectives emphasize VPN as a secure method for remote connectivity.
質問 # 254
A technician is working on a help desk ticket for a user who wants the filament replaced in a 3-D printer.
Which of the following should the technician do to remove the old filament and load the new one?
- A. Cut a sharp angle on the end of the strand.
- B. Preheat the nozzle to melting temperature.
- C. Withdraw the filament and remove the spool.
- D. Push the filament along until resistance is felt.
正解：C
解説：
A technician is working on a help desk ticket for a user who wants the filament replaced in a 3-D printer. To remove the old filament and load the new one, the technician should preheat the nozzle to melting temperature. After the nozzle is heated, the technician should withdraw the filament and remove the spool.
Then, cut a sharp angle on the end of the new strand, and push it along until resistance is felt.
質問 # 255
A user reports a repetitive clicking noise is coming from a personal laptop. A technician notes the laptop's inputs are severely delayed. Which of the following should the technician replace to resolve the issue?
- A. The battery
- B. The integrated keyboard
- C. The memory
- D. The storage device
正解：D
解説：
A repetitive clicking noise coming from a laptop is usually a sign of a failing hard disk drive (HDD), which is a type of storage device that uses spinning platters and moving heads to read and write data. A failing HDD can also cause severe delays in input and output operations, as well as data loss or corruption. The technician should replace the HDD with a new one or upgrade it to a solid state drive (SSD), which is another type of storage device that uses flash memory and has no moving parts. Reference:
https://partners.comptia.org/docs/default-source/resources/a-core-series-combined-content-guide (page 24)
質問 # 256
A technician is setting up a projector for a videoconferencing system. When the user attempts to connect a laptop to the system, the system displays the following error message: no source found The user tries multiple cables and inputs on the projector. Which of the following should the user try NEXT?
- A. Replace the video card on the machine that is plugged in to the projector, as it has gone bad.
- B. Check the display settings on the computer and set them to extend/duplicate.
- C. Check the bulb on the projector and replace it with a new one.
- D. Replace the projector with another known-good one and try again.
正解：B
解説：
If no image is displayed on the monitor or projector, first make sure that the display device is plugged in and turned on. Check that the monitor is not in standby mode (press a key or cycle the power to the monitor to activate it).
You may also need to use controls on the monitor itself to adjust the image or select the appropriate data source or input channel. For example, if there is no image on the screen, check that the monitor is set to use the HDMI port that the computer is connected to, rather than an empty DVI port. These o n-screen display (OSD) menus are operated using buttons on the monitor case. As well as input control, you can usually find settings for brightness, color/contrast, and power saving.
質問 # 257
......
CompTIA A +認定試験：Core 1は、IT業界の多くの雇用主に認められ、多くの初心者向けのポジションに必要な認定資格です。この認定資格は、ITプロフェッショナルのスキルと知識を検証し、彼らが技術分野への取り組みを示すことを証明します。
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