hardMultiple Choice
220-1201 Practice Question: During a BIOS update on a workstation, the power…
During a BIOS update on a workstation, the power is interrupted, and now the system fails to POST. The motherboard has a backup BIOS chip. What is the most efficient way to recover the system?
⚠ Common exam trap
The trap is assuming that clearing CMOS (removing the battery) will fix a failed BIOS update — candidates conflate clearing configuration settings with repairing corrupted firmware, which are entirely different layers.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Switch the motherboard's dual BIOS jumper to the backup position
When a motherboard has a dual BIOS (backup BIOS) feature, the fastest recovery from a corrupted primary BIOS is to switch the hardware jumper (or use the board's BIOS switch) to boot from the backup chip. This bypasses the corrupted firmware entirely and lets the system POST immediately, after which the backup can be used to reflash the primary. It requires no external media or lengthy power-drain procedures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Replace the motherboard
Why it's wrong here
Replacing the entire motherboard is an extreme and costly measure that should only be considered as a last resort when all other BIOS recovery options have demonstrably failed. If the motherboard features a dual BIOS system, as implied by the correct solution, a simple firmware corruption does not necessitate a complete hardware replacement. This approach is inefficient and unnecessary when more direct and less expensive recovery methods are available.
- ✗
Use a USB flash drive with the correct BIOS file and press a recovery key combination
Why it's wrong here
While some motherboards support BIOS recovery from a USB drive using specific key combinations or dedicated ports (e.g., Q-Flash Plus, BIOS Flashback), this method often relies on the primary, potentially corrupted, BIOS still being able to initiate a recovery routine. If the primary BIOS is severely corrupted and cannot even begin this process, or if the board lacks this specific feature, this approach would be ineffective compared to directly switching to a known-good backup chip.
- ✗
Remove the CMOS battery for 30 minutes
Why it's wrong here
Removing the CMOS battery for an extended period only clears the stored BIOS/UEFI settings, such as boot order, date/time, and overclocking profiles, by draining the volatile memory. It does not, however, restore or repair the underlying BIOS firmware itself if it has become corrupted during an update. Firmware corruption requires reflashing the chip with a valid image or switching to a functional backup, not merely resetting configuration parameters.
- ✓
Switch the motherboard's dual BIOS jumper to the backup position
Why this is correct
Many modern motherboards incorporate a dual BIOS feature, which includes a primary BIOS chip and a secondary, identical backup chip containing a stable firmware version. Switching the motherboard's dual BIOS jumper physically activates the backup chip, allowing the system to boot successfully even if the primary BIOS is corrupted. Once booted from the functional backup, the system can then be used to reflash and restore the corrupted primary BIOS chip, resolving the issue without hardware replacement.
Go deeper
Related to this question
Learn chapter
BIOS/UEFI Update Procedures
Key term
CAN
A CAN (Controller Area Network) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
Key term
Power-on Self-test
The Power-on Self-test (POST) is a diagnostic process a computer runs immediately when you turn it on to check that essential hardware components are working correctly before loading the operating system.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This 220-1201 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1201 exam.