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220-1201 Hardware Virtualization Extensions Practice Question
A technician is deploying a new virtual machine on a Type 2 hypervisor (hosted) for software testing. The host machine runs Windows 10 Pro with 16 GB RAM and a quad-core CPU. The test application requires 4 GB RAM and two virtual CPUs. After creating the VM with those settings, the technician notices the host becomes extremely sluggish even when the VM is idle. What is the most likely reason for this?
⚠ Common exam trap
Many candidates assume that host sluggishness is always due to RAM overallocation, but on a Type 2 hypervisor, the absence of hardware virtualization extensions can cause performance degradation even with modest VM resources.
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
✓
The host machine’s CPU does not support Intel VT-x or AMD-V.
Type 2 hypervisors rely on hardware virtualization extensions (Intel VT-x or AMD-V) to run virtual machines efficiently. If the host CPU does not support these extensions (or they are disabled in the BIOS), the hypervisor falls back to software emulation, which imposes heavy overhead on the host CPU. This overhead is present even when the VM is idle because the hypervisor must constantly manage emulated instructions. With the host running Windows 10 Pro and a quad-core CPU, the software emulation can cause the host to become sluggish. Allocating only 4 GB RAM to the VM leaves 12 GB for the host, which is sufficient for Windows 10 Pro and typical background processes, so option C is unlikely to be the cause.
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 hypervisor does not support hardware acceleration for the guest OS.
Why it's wrong here
This option is incorrect because modern hypervisors, whether Type 1 (bare-metal) or Type 2 (hosted), almost universally support hardware acceleration for guest operating systems, particularly for graphics and I/O. A lack of such acceleration would primarily impact the performance of the virtual machine itself during resource-intensive tasks, not cause general sluggishness on the host machine, especially when the VM is idle. Host-wide performance degradation points to a more fundamental inefficiency in the virtualization process.
- ✓
The host machine’s CPU does not support Intel VT-x or AMD-V.
Why this is correct
This is the correct answer. Intel VT-x and AMD-V are crucial CPU virtualization extensions that allow a hypervisor to run guest operating systems directly on the CPU with minimal overhead. Without these hardware assists, the hypervisor must perform extensive software emulation, translating guest instructions into host instructions in real-time. This continuous software-based translation consumes significant CPU resources, creating constant overhead that degrades the host machine's overall performance, even when the virtual machine is idle.
- ✗
The technician allocated too much RAM to the VM, leaving insufficient memory for the host OS.
Why it's wrong here
Allocating 4 GB RAM to the VM leaves 12 GB for the host, which is more than enough for Windows 10 Pro and background processes. Host sluggishness from RAM starvation would require much more aggressive allocation, so this is unlikely.
- ✗
The virtual switch is misconfigured, causing network loops.
Why it's wrong here
This option is incorrect. A misconfigured virtual switch leading to network loops would primarily cause network congestion and broadcast storms, severely impacting network performance for both the virtual machine and potentially the host. While this is a serious issue, it would not typically manifest as general system sluggishness affecting the host's CPU or disk I/O when the VM is idle and not actively transmitting or receiving network data. The symptoms described point to a broader system performance issue rather than a network-specific problem.
Go deeper
Related to this question
Learn chapter
Laptop Hardware and Components
Key term
CPU
The Central Processing Unit (CPU) is the main electronic brain of a computer that carries out instructions from software by performing basic arithmetic, logic, control, and input/output operations.
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.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.