- (Topic 1)
Which of the following DNS record types is used to direct email to a mail server?
Correct Answer:C
An MX (Mail Exchange) record specifies the mail server responsible for receiving email for a domain.
Why Not A (CNAME): CNAME is used for domain aliasing, not for email delivery. Why Not B (SRV): SRV records are used to locate specific services, not mail servers.
Why Not D (SOA): SOA records provide domain information but do not handle email. CompTIA A+ Exam Reference: Core 1 (220-1201), Section 2.6, DNS record types.
- (Topic 1)
An SAS RAID array has severely degraded and gone offline A systems administrator examines the syslog, and the point of failure is not obvious. Which of the following techniques should the administrator use to identify the issue (Select two).
Correct Answer:CF
Clicking and grinding noises indicate mechanical drive failure.
SMART data provides insights into the health and status of drives, helping identify failing components in the RAID array.
Why Not A (Run a magnet): This would damage drives.
Why Not B (Check if one drive is not level): Physical leveling is irrelevant.
Why Not D (Check OS logs): OS logs may provide limited information for RAID arrays. Why Not E (Update RAID controller firmware): While important, it does not diagnose drive failure.
CompTIA A+ Exam Reference: Core 1 (220-1201), Section 3.3, storage troubleshooting.
- (Topic 1)
Which of the following cloud models would multiple organizations in the same industry most likely use?
Correct Answer:C
Comprehensive and Detailed In-Depth Explanation:
ACommunity Cloudis designed for use by several organizations with shared concerns (e.g., security, compliance, jurisdiction). It??s common in industries like healthcare or finance where multiple entities benefit from a common infrastructure with shared policies.
✑ Option A (Public):Open to general public or large industry group — less secure.
✑ Option B (Hybrid):Mix of public and private — does not imply industry collaboration.
✑ Option D (Private):Dedicated to a single organization. CompTIA A+ Core 1 Exam Objective Reference:
✑ Objective 2.1: Compare and contrast cloud computing concepts.
- (Topic 1)
A user reports that their desktop PC does not turn on. Which of the following components would most likely cause the issue?
Correct Answer:A
Comprehensive and Detailed In-Depth Explanation:
If a desktopfails to power on entirely, the most probable cause is afaulty Power Supply Unit (PSU). If there are no lights, fans, or POST beeps, the PSU may have failed, cutting off all power to the motherboard and components.
✑ Option B (GPU):Could prevent video output, but the system would still power on
and beep.
✑ Option C (RAM):Missing or faulty RAM would cause POST errors but not prevent startup entirely.
✑ Option D (CPU):A bad CPU may cause POST failure, but the system would usually at least power on.
CompTIA A+ Core 1 Exam Objective Reference:
✑ Objective 3.5: Given a scenario, troubleshoot problems related to motherboards, RAM, CPU, and power.
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- (Topic 1)
Which of the following resolutions is commonly known as Ultra HD?
Correct Answer:C
Comprehensive and Detailed In-Depth Explanation:
Ultra HD (UHD), also referred to as4K UHD, has a resolution of3840x2160. It's four times the resolution of standard 1080p (Full HD), offering more screen real estate and sharper images.
✑ Option A (1920x1080):Full HD (FHD), not UHD.
✑ Option B (2048x1080):DCI 2K — used in cinema, not common for Ultra HD.
✑ Option D (7680x4320):Known as 8K UHD, not standard Ultra HD. CompTIA A+ Core 1 Exam Objective Reference:
✑ Objective 1.7: Compare and contrast display technologies and their features.
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