20+ practice questions focused on BIOS / UEFI — one of the most tested topics on the CompTIA A+ Core 1 220-1201 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start BIOS / UEFI PracticeAfter replacing a motherboard, a technician installs Windows but the system will not boot from the SSD. The drive is detected in UEFI. The technician recalls the previous motherboard used Legacy BIOS. What is the most likely issue?
Explanation: If the new motherboard defaults to UEFI mode but the SSD was formatted with an MBR partition table (for Legacy), the system cannot boot. Changing to Legacy/CSM mode or reinstalling with GPT is needed. This tests understanding of partition table and boot mode compatibility.
A customer complains that their computer takes a very long time to boot and sometimes shows a 'CMOS Checksum Error' before starting. What is the most likely hardware issue?
Explanation: A CMOS checksum error indicates that the BIOS/UEFI settings are not being retained, often due to a failing or dead CMOS battery. This causes time/date resets and boot delays as the firmware re-detects hardware. This tests knowledge of common CMOS-related symptoms.
After updating the firmware on a workstation, the system fails to boot and displays a 'Boot Device Not Found' error. The hard drive is detected in UEFI settings. What is the most likely cause?
Explanation: A firmware update can reset UEFI settings to defaults, including boot mode. If the drive was formatted for Legacy (CSM) but the system now defaults to UEFI, or vice versa, the bootloader won't be found. This tests understanding of boot mode compatibility.
A technician is tasked with enabling hardware-level virtualization on a desktop to run a virtual machine. Which UEFI setting must be enabled?
Explanation: Intel VT-x or AMD-V is the hardware virtualization feature that must be enabled in the CPU configuration section of UEFI. Without it, virtual machines will run slowly or fail to start. This tests knowledge of common UEFI settings for virtualization.
During a routine hardware upgrade, a technician installs a new graphics card. The system powers on but no display appears. The old card works fine. What UEFI setting should be checked first?
Explanation: If the system has integrated graphics and a discrete card, the UEFI may default to the integrated output. Changing the primary video adapter to PCIe/ PEG forces the system to use the new card. This tests understanding of video initialization order in UEFI.
+15 more BIOS / UEFI questions available
Practice all BIOS / UEFI questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of BIOS / UEFI. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
BIOS / UEFI questions on the 220-1201 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. BIOS / UEFI is tested as part of the CompTIA A+ Core 1 220-1201 blueprint. Practicing with targeted BIOS / UEFI questions ensures you can handle any format or difficulty that appears.
Yes. Courseiva provides free 220-1201 practice questions across all exam topics and domains. The platform includes topic-based practice, mock exams, missed-question review, bookmarked questions, and readiness tracking — no account required.
Difficulty is subjective, but BIOS / UEFI is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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