220-1101 Question 356
Single answerCross-platform virtualizationA technician uses a Windows 11 laptop to support a software team that develops for both Windows and Linux. The team wants to run an Ubuntu virtual machine on the laptop for testing without rebooting into another operating system or dedicating a separate physical computer. The laptop's CPU supports hardware virtualization, but the Ubuntu VM fails to start and the virtualization software reports that virtualization is not available. Which action should the technician take FIRST to resolve the issue?
- A
Enable Intel VT-x or AMD-V in the system BIOS/UEFI settings
- B
Convert the Ubuntu virtual machine from dynamic disk allocation to fixed disk allocation
- C
Install a second physical network adapter in the laptop for bridged networking
- D
Increase the laptop display resolution to support the Ubuntu desktop environment
Show answer and explanation
Correct answer: A
Explanation
The key issue is that the system already has a CPU capable of virtualization, but the hypervisor reports that virtualization is unavailable. In real-world troubleshooting, the first step is to verify that hardware virtualization support is enabled in BIOS/UEFI. Desktop virtualization platforms such as Oracle VM VirtualBox and VMware Workstation commonly rely on Intel VT-x or AMD-V to run 64-bit guest operating systems efficiently. This aligns with CompTIA A+ Core 1 objectives covering virtualization concepts and basic troubleshooting. Vendor documentation from Intel, AMD, VMware, and Oracle also emphasizes that CPU virtualization extensions may need to be enabled in firmware before virtual machines can start properly.
- A. Correct.
This is correct. Even if the processor supports virtualization, the feature must also be enabled in BIOS/UEFI before most desktop hypervisors can use it. On A+ Core 1, a common troubleshooting step for cross-platform virtualization is verifying that Intel VT-x or AMD-V is enabled when a VM will not start or the hypervisor reports that hardware virtualization is unavailable.
- B. Incorrect.
This is incorrect. Disk allocation type affects storage performance and capacity planning, not whether the hypervisor can access CPU virtualization extensions. Someone might choose this if they confuse VM startup issues caused by insufficient disk space with errors specifically stating that virtualization is unavailable.
- C. Incorrect.
This is incorrect. A second NIC is not required to run a Linux guest on a Windows host. Bridged networking may be useful in some lab scenarios, but it does not resolve a CPU virtualization error. This distractor targets the misconception that VM networking requirements are the primary barrier to running cross-platform guests.
- D. Incorrect.
This is incorrect. Display resolution has no impact on whether the host can create or start a VM. Ubuntu can run in a VM at many resolutions, and graphics settings are unrelated to BIOS/UEFI hardware virtualization support.