220-1201 Practice Question: During a desktop build, you install a new M.2…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  The M.2 slot is SATA-only and the drive is NVMe

  Why this is correct

  M.2 slots are versatile but can be protocol-specific, supporting either SATA or NVMe (PCIe-based) communication. If a motherboard's M.2 slot is wired only for SATA, it lacks the necessary PCIe lanes and controller logic to interface with an NVMe drive. Consequently, an NVMe M.2 drive installed in a SATA-only M.2 slot will not be detected by the system BIOS or operating system, as the electrical and logical communication protocols are incompatible despite a potential physical fit.

• ✗

  The CMOS battery needs replacement

  Why it's wrong here

  A failing or dead CMOS battery primarily affects the retention of BIOS/UEFI settings, such as system time, date, and boot order, when the system loses power. While it might cause the system to revert to default settings upon reboot, it does not directly interfere with the physical detection or initialization of newly installed hardware components like an M.2 drive. The motherboard's power delivery and data bus for the M.2 slot would remain operational regardless of the CMOS battery's charge.

• ✗

  The motherboard BIOS is corrupted

  Why it's wrong here

  A corrupted motherboard BIOS (Basic Input/Output System) would typically manifest as severe system instability, boot failures, or a complete inability to POST (Power-On Self-Test). Such a critical issue would affect the entire system's initialization process, preventing it from even reaching a stage where it could attempt to detect specific storage devices like an M.2 drive. It is highly unlikely to cause only the isolated symptom of a single M.2 drive not being detected while the rest of the system functions normally.

• ✗

  The CPU is not seated properly

  Why it's wrong here

  An improperly seated CPU would prevent the system from completing the Power-On Self-Test (POST) and typically result in a "no-post" condition, meaning no display output, no beeps, or a complete system shutdown shortly after power-on. Since the CPU is crucial for initializing memory, controlling PCIe lanes (which M.2 NVMe drives utilize), and orchestrating the entire boot process, an issue with its seating would halt the system before it could even attempt to detect or interact with an M.2 drive.

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