CompTIA CompTIA Certifications 220-1101 Questions & Answers

• Question 581:

  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. DDR3 SDRAM

  C. DDR4 SDRAM

  D. DDR5 SDRAM

  Correct Answer: D

  Explanation: 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. The other options are not as fast or suitable for a desktop workstation. DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM are older and slower types of RAM that have lower frequencies, higher voltages, and lower capacities than DDR5 SDRAM. DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM are not compatible with the latest processors that support DDR5 SDRAM, and require different motherboards and slots. DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM are more suitable for older or budget systems that do not require high performance or memory-intensive applications. References: The best RAM 2023: top memory for your PC1 The best RAM for gaming 2023: Blazing-fast speeds for your PC2 What RAM Speed Do I Need? [2023 Guide] - GamingScan3 Crucial RAM Memory for Desktop Computers4

• Question 582:

  A technician is selecting RAM for a new high-end workstation. The motherboard has eight slots that support DDR5 memory. Which of the following should the technician do to optimize performance?

  A. Use the minimum number of modules.

  B. Increase the virtual RAM.

  C. Increase memory timings.

  D. Utilize all channels.

  Correct Answer: D

  Explanation: The best option that the technician should do to optimize performance is D. Utilize all channels. This option means that the technician should install the RAM modules in a way that maximizes the number of memory channels that are used by the motherboard. Memory channels are pathways that connect the memory controller to the RAM modules, and they allow data to be transferred between them. The more memory channels that are used, the higher the memory bandwidth and performance1. DDR5 memory supports up to eight memory channels per module, which is twice as many as DDR42. However, not all motherboards can support eight channels per module, and some may only support four or two channels per module. Therefore, the technician should check the motherboard specifications and manual to determine how many memory channels it supports and how to install the RAM modules accordingly. For example, if the motherboard supports four channels per module, then the technician should install four RAM modules in slots 1, 3, 5, and 7 to use all 16 available channels. If the motherboard supports two channels per module, then the technician should install eight RAM modules in all slots to use all 16 available channels. If the technician installs fewer modules than the number of slots, then some channels will be left unused and the performance will be lower1.

• Question 583:

  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. Inspect the motherboard for swollen capacitors.

  B. Replace the CMOS battery_

  C. Swap the power supply if it is inoperable.

  D. Check to see if the HDD power connectors are well seated

  Correct Answer: C

  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].

• Question 584:

  Which of the following is the purpose of an IPv4 gateway?

  A. To distribute IP addresses

  B. To generate ARP traffic

  C. To assign APIPA addresses

  D. To route traffic to the next network

  Correct Answer: D

  Explanation: To route traffic to the next network. An IPv4 gateway is a device that connects two or more networks and forwards packets based on their destination IP addresses. It acts as an intermediary between a host and the rest of the

  internet, allowing communication across different networks. A gateway does not distribute IP addresses, generate ARP traffic, or assign APIPA addresses, as these are functions of other network components.

  Reference: [CompTIA A+ Core 1 (220-1101) Certification Study Guide], page 29.

• Question 585:

  A user's mobile device can back up classified files to an external hard drive at work but cannot save pictures to an external drive at home. Which of the following is most likely the issue?

  A. The pictures do not have a classification flag set.

  B. The drive permissions are insufficient.

  C. Peripherals are managed via MDM.

  D. Drivers are incorrectly installed.

  Correct Answer: B

  The most likely issue in this scenario is:

  B. The drive permissions are insufficient.

  Explanation:

  If the user can back up classified files to an external hard drive at work but cannot save pictures to an external drive at home, it suggests that the external drive at home may have insufficient permissions.

• Question 586:

  A user's mobile phone is constantly running hot and has a short battery life. A technician replaces the battery in the phone, but the issue persists. Which of the following steps should the technician take next?

  A. Check the device for updates.

  B. Check the device for malware.

  C. Check the device for liquid damage.

  D. Check the device's charging adapter.

  Correct Answer: B

  Explanation: The next step that the technician should take after replacing the battery in the phone is to check the device for malware. Malware is a malicious software that can infect the phone and cause various problems, such as

  overheating, battery drain, data theft, pop-up ads, or performance slowdowns. Malware can enter the phone through various sources, such as downloading apps from untrusted sources, clicking on suspicious links or attachments, or

  connecting to insecure Wi-Fi networks. To check the device for malware, the technician can use a reputable antivirus or anti- malware app, such as the ones found in the web search results123. The technician can follow these steps:

  Download and install the antivirus or anti-malware app from a trusted source, such as the Google Play Store or the Apple App Store. Launch the app and grant it the necessary permissions to scan the device. Run a full scan of the device and

  wait for the results. If the app detects any malware, follow the app's instructions to remove or quarantine it.

  Restart the device and check if the overheating and battery drain issues are resolved.

  Other steps, such as checking the device for updates, checking the device for liquid damage, or checking the device's charging adapter, may not be relevant or effective for solving the overheating and battery drain issues caused by malware.

  Checking the device for updates may improve the security and performance of the device, but it may not remove the existing malware. Checking the device for liquid damage may reveal physical damage to the device, but it may not explain

  the constant overheating and battery drain. Checking the device's charging adapter may ensure the proper charging of the device, but it may not affect the device's temperature or battery life when it is not plugged in.

  References:

  Best Android antivirus apps of 2023 | Tom's Guide1 Best iPhone antivirus apps in 2023 | TechRadar2

  The best antivirus software for Android - AV-TEST3

• Question 587:

  An administrator notices that on an intermittent basis the virtual machines are running slowly. The virtual machines are correctly sized, and the hardware has enough free resources to cope with demand.

  Which of the following is most likely the cause?

  A. The physical servers are not able to draw enough power

  B. The physical servers do not have enough network bandwidth.

  C. The physical servers are throttling due to overheating

  D. The physical servers are contending for resources

  Correct Answer: C

  The physical servers are throttling due to overheating. This means that the servers are reducing their performance to prevent damage from excessive heat. This can cause the virtual machines to run slowly, as they depend on the physical servers' resources. To avoid this, the servers need adequate cooling and ventilation, as well as monitoring of their temperature and fan speed. According to the CompTIA Core1 objectives, one of the environmental factors that can affect system performance is overheating. A research paper on thermal management of servers also states that overheating can lead to performance degradation, reliability issues, and energy inefficiency.

• Question 588:

  Which of the following ports allows for secure communications?

  A. 20

  B. 22

  C. 23

  D. 25

  Correct Answer: B

  Explanation: The correct answer is B. 22. Port 22 is the default port for SSH (Secure Shell), a protocol that allows secure and encrypted remote login and command execution over a network. SSH uses public key cryptography to authenticate the client and the server, and to encrypt the data exchanged between them. SSH can be accessed through different ports, depending on the configuration of the server and the client. The default port for SSH is 22, but it can be changed to any other port for security reasons1. Port 20 is the default port for FTP (File Transfer Protocol) data transfer, a protocol that allows file transfer between a client and a server over a network. FTP uses two ports: one for data transfer (port 20) and one for control commands (port 21). FTP does not provide encryption or authentication, and it is vulnerable to various attacks, such as packet sniffing, spoofing, or brute force. To secure FTP connections, protocols such as FTPS (FTP over SSL) or SFTP (SSH File Transfer Protocol) can be used2. Port 23 is the default port for Telnet, a protocol that allows remote login and command execution over a network. Telnet does not provide encryption or authentication, and it sends data in plain text, which can be easily intercepted or modified by attackers. Telnet is considered obsolete and insecure, and it should be replaced by SSH or other secure protocols3. Port 25 is the default port for SMTP (Simple Mail Transfer Protocol), a protocol that allows sending and receiving email messages over a network. SMTP does not provide encryption or authentication, and it can be exploited by spammers or hackers to send malicious or unwanted emails. To secure SMTP connections, protocols such as SMTPS (SMTP over SSL) or STARTTLS (Transport Layer Security) can be used. Therefore, port 22 is the only port that allows for secure communications by default, as it uses SSH protocol. For more information about ports and their security, you can refer to the following web search results: How to secure your TCP/IP ports, What is an SSL port? A technical guide for HTTPS, HTTPS Port: What It Is, How to Use It, and More (2023).

• Question 589:

  Which of the following DNS records is used to look up the IP address assigned to a domain name?

  A. A

  B. MX

  C. NS

  D. SPF

  Correct Answer: A

  A DNS record is a data entry in a DNS server that maps a domain name to a specific value, such as an IP address, a mail server, a name server, or a text string. There are different types of DNS records for different purposes, and each type has a specific format and syntax12. The A record, also known as the address record, is the most common type of DNS record, and it is used to look up the IP address assigned to a domain name. The A record maps a domain name to an IPv4 address, which is a 32-bit numerical value that identifies a device on the internet. For example, the A record for www.google.com is 172.217.14.20612. The other options are not correct because they are not used to look up the IP address assigned to a domain name. The MX record, also known as the mail exchange record, is used to specify the mail servers that handle the email for a domain name. The MX record maps a domain name to a priority value and a host name of a mail server. For example, the MX record for gmail.com is 10 alt1.gmail-smtp-in.l.google.com12. The NS record, also known as the name server record, is used to delegate a domain name to a set of authoritative name servers. The NS record maps a domain name to a host name of a name server that can provide authoritative answers for the domain name and its subdomains. For example, the NS record for example.com is ns1.example.com12. The SPF record, also known as the sender policy framework record, is used to prevent email spoofing and spamming by validating the sender's identity. The SPF record maps a domain name to a text string that specifies the authorized mail servers and IP addresses that can send email on behalf of the domain name. For example, the SPF record for microsoft.com is v=spf1 include:spf.protection.outlook.com -all12. References: DNS Configuration -CompTIA A+ 220-1101 ?2.6 CompTIA A+ Certification Core 1 (220-1101) [Video] - Packt Subscription, Section

  2: Networking, Video 2.6: DNS Configuration CompTIA A+ Certification Core 1 (220-1101) - GitHub, Slide Handout PDFs 1101, Chapter 2: Networking, Slide 2.6: DNS Configuration

• Question 590:

  A customer purchased an active touch pen for a tablet PC. After the customer used the pen for a few days, it stopped working. Which of the following is most likely causing the issue?

  A. The tablet screen is scratched.

  B. The pen software is out of date.

  C. The pen batteries need recharging.

  D. Software updates disabled the pen.

  Correct Answer: C

  Explanation: The most likely answer is C. The pen batteries need recharging. An active touch pen is a stylus that uses a battery to power features such as pressure sensitivity, buttons, or Bluetooth connectivity. If the pen batteries are low or depleted, the pen may stop working or become inaccurate1. To fix this issue, you should recharge the pen batteries using the provided charger or cable, or replace them with new ones if they are not rechargeable1. The other options are less likely to cause the issue. A scratched tablet screen may affect the touch sensitivity, but it should not affect the pen functionality. The pen software may need updating to improve performance or compatibility, but it should not stop the pen from working altogether. Software updates may disable the pen if they change the settings or drivers, but this can be fixed by re-enabling the pen or reinstalling the drivers2. References:

  1: Troubleshoot your Surface Pen - Microsoft Support

  2: Windows 10 touch screen: active pen works, finger does not - Super User