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| Section | Weight | Objectives |
|---|---|---|
| Hardware and Network Troubleshooting | 29% | - Troubleshooting methodology
|
| Networking | 20% | - Network fundamentals
|
| Hardware | 25% | - PC hardware components
|
| Mobile Devices | 15% | - Mobile device hardware and components
|
| Virtualization and Cloud Computing | 11% | - Cloud computing concepts
|
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NEW QUESTION # 127
A technician needs to configure an MX record. Which of the following will the technician use?
Answer: A
Explanation:
An MX, or Mail Exchanger, record is a type of DNS resource record. It identifies the mail server responsible for accepting email for a particular domain. Consequently, an MX record is created or modified in the domain's DNS zone, which is hosted on a DNS server.
Although the MX record points to a mail server, the record itself is configured through DNS. The mail server is the destination identified by the record, not the service in which the DNS record is stored.
A proxy server intermediates network requests, commonly for filtering, caching, or privacy.
A mail server sends, receives, and stores email, but DNS tells other systems how to locate it.
A print server manages printers and print jobs.
CompTIA objective 2.4 specifically includes DNS record types such as A, AAAA, CNAME, MX, and TXT. Microsoft also defines an MX record as a DNS resource record that identifies a domain's mail server.
NEW QUESTION # 128
A technician is building a high-powered workstation. When the technician attempts to start the workstation, nothing happens. The technician verifies that all power connectors are fully seated. Which of the following is the most likely cause of the issue?
Answer: A
Explanation:
When a newly built workstation shows no response at all-no fans spinning, no indicator LEDs, and no POST activity-this indicates that the system is not receiving the signal to power on. Since the technician has already verified that all primary power connectors are fully seated (including the 24-pin ATX motherboard connector and the 4-pin or 8-pin CPU power connector), the most likely cause is that the case header pins are not connected to the motherboard.
According to CompTIA Core 1 (220-1201) hardware installation and troubleshooting concepts, the power button on the computer case connects to the motherboard via the front-panel (system panel) header, specifically the PWR_SW pins. If this connector is missing, improperly placed, or connected to the wrong pins, pressing the power button will do nothing because the motherboard never receives the power-on signal.
Incorrectly seated RAM typically allows the system to power on but prevents successful POST, often resulting in beep codes or error lights. An underpowered PSU usually causes instability, random shutdowns, or failure under load rather than complete inactivity. A faulty CPU fan connector generally triggers a BIOS warning or shutdown after power-on, not total failure to start.
This scenario directly matches CompTIA's emphasis on checking front-panel connections as a primary step when a system does not power on at all.
References:CompTIA A+ Core 1 (220-1201) Official Study Guide - Hardware Installation, Motherboard Components, and Power Troubleshooting Sections
NEW QUESTION # 129
A user replaces their PC power supply and connects it to the components, but the PC fails to start. What is the most likely cause?
Answer: D
Explanation:
Modern motherboards require both the 24-pin ATX connector and a 4-pin or 8-pin CPU power connector. If the CPU power connector is not attached, the motherboard will receive power but the system will not boot. CompTIA A+ specifically lists this as a common mistake after replacing a power supply.
Insufficient wattage may cause instability, but usually the system still attempts to start. RAM does not prevent power-on if missing; instead, the system produces beep codes. Redundant PSUs are used in servers, not standard desktops.
Therefore, the missing CPU power connector is the most likely cause, and this scenario reflects typical troubleshooting steps outlined in A+ hardware diagnostics.
NEW QUESTION # 130
Some users are unable to access their workstations. An administrator runs ipconfig on one of the workstations and sees the following:
The administrator runs the following command and receives this output:
Which of the following is the source of issue?
Answer: B
Explanation:
The workstation ' s IP configuration (192.168.1.27/24 with gateway 192.168.1.1) shows that it has a correct IP address, correct subnet mask, and expected default gateway for a typical small office network. Because the IP is in the correct private range and not an APIPA address (169.254.x.x), this also confirms that DHCP is functioning properly. Therefore, option D (DHCP) cannot be the cause.
The user then pings the default gateway at 192.168.1.1, which should be the router-the device providing routing between local devices and outside networks. The repeated " Request timed out " responses indicate the workstation cannot reach the router at all. This type of failure points directly to a router outage, a powered- off router, a failed router interface, or a physical disconnection of the router from the switch.
If DNS (C) were the issue, the user would still be able to ping the IP address of the gateway because DNS is not required for IP-to-IP connectivity. A web server (A) has no relation to local gateway communication and does not affect workstation access.
Since the workstation has a valid IP but cannot reach its default gateway, the failure point is the router.
NEW QUESTION # 131
Which of the following describes an advantage of mini-LED displays over OLED displays?
Answer: D
Explanation:
* The correct answer is D. Decreased burn-in.
According to CompTIA A+ Core 1 220-1201 objectives under Hardware and Display Technologies:
* Mini-LED displays use an array of tiny LEDs as a backlight for LCD panels.
* Unlike OLED displays, which are susceptible to burn-in (permanent image retention when static content is displayed for long periods), mini-LEDs reduce the risk because the pixels themselves do not emit light individually and are less prone to permanent image retention.
Why the other options are incorrect:
* A. Increased contrast: OLED typically provides better contrast because it can turn off individual pixels completely.
* B. No backlight: Mini-LEDs still use a backlight, whereas OLEDs do not.
* C. Improved viewing angle: OLEDs generally offer wider viewing angles than mini-LED LCDs.
References:
CompTIA A+ Core 1 (220-1201) Exam Objectives - Hardware: "Given a scenario, select display types and technologies considering resolution, contrast, burn-in risk, and backlighting." Mike Meyers' CompTIA A+ Certification Guide, 13th Edition, Chapter on Display Technologies.
NEW QUESTION # 132
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