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CompTIA 220-1201 Exam Questions
Free CompTIA 220-1201 Exam Actual Questions
Note: Premium Questions for 220-1201 were last updated On Jun. 24, 2026 (see below)
The power supply for a user's gaming computer fails. The user buys a replacement online. The user connects the power supply to the motherboard, the graphics card, and the SSDs, but the computer fails to start and displays a critical error. Which of the following is the most likely cause?
Modern motherboards require two separate power connections from the power supply: the 24-pin ATX connector for general motherboard power and a 4-pin or 8-pin CPU (EPS) connector dedicated to powering the processor. According to CompTIA Core 1 (220-1201) power supply installation and troubleshooting guidelines, failing to connect the CPU power connector commonly results in a system that does not boot and may display a critical or CPU-related error.
In this scenario, the user connected power to the motherboard, graphics card, and storage devices, but the system fails to start. This strongly indicates that the CPU power connector was overlooked, which is a frequent mistake during PSU replacement. Without this connection, the processor cannot initialize, preventing POST.
Insufficient wattage typically causes instability, shutdowns, or reboots under load rather than immediate failure with a critical error. RAM upgrades are unrelated to PSU replacement, and redundant power supplies are used in enterprise systems, not standard gaming PCs.
CompTIA emphasizes verifying all required PSU connectors, especially the CPU power connector, as a critical troubleshooting step when a system will not power on after a PSU replacement.
A local bank is designing its new infrastructure blueprint. Which of the following RAID types offers double parity?
RAID 6 is the RAID level that provides double parity, allowing the system to tolerate the failure of two disks simultaneously without data loss. According to CompTIA Core 1 (220-1201) storage and RAID objectives, RAID 6 improves fault tolerance by storing two independent parity blocks across all disks in the array.
RAID 0 provides no parity or redundancy and focuses only on performance through striping. RAID 1 uses mirroring, duplicating data across two drives but does not use parity. RAID 5 uses single parity, allowing recovery from only one failed drive.
For environments such as a local bank, where data integrity and availability are critical, RAID 6 is commonly preferred due to its higher fault tolerance compared to RAID 5. Although RAID 6 has slightly lower write performance due to the additional parity calculation, the increased resilience makes it suitable for mission-critical systems.
CompTIA highlights RAID 6 as a common enterprise solution when both redundancy and reliability are priorities.
A technician is troubleshooting a workstation that repeatedly shuts down within ten minutes of being turned on. The technician notices a loud clicking sound coming from inside the case. Which of the following components should the technician check first?
A failing CPU fan may make unusual noises (including clicking) and, if it is not cooling the CPU, the system will quickly overheat and shut down to prevent damage.
From CompTIA A+ 220-1101 Official Study Guide, Objective 4.1 -- Troubleshooting hardware problems:
''Overheating due to a failed or obstructed CPU fan can cause frequent shutdowns. Loud noises are a sign the fan should be checked first.''
Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 4: PC Hardware Troubleshooting
CompTIA Exam Objectives 220-1101, Domain 4.1
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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?
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.
A technician needs to update a web server's IPv4 address in a DNS server. Which of the following records should the technician update?
An A record maps a domain name to an IPv4 address in a DNS server.
From CompTIA A+ 220-1101 Official Study Guide, Objective 2.6 -- DNS records:
''A records map hostnames to IPv4 addresses, while AAAA records map to IPv6 addresses.''
Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 2: DNS Records
CompTIA Exam Objectives 220-1101, Domain 2.6
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