100-140 Question 319
Single answerA company is running multiple virtual machines (VMs) on a single physical server using a hypervisor. One of the VMs is experiencing performance issues, but the other VMs are running smoothly. What is the most likely cause of the issue?
- A
The physical server has insufficient CPU or RAM resources overall.
- B
The hypervisor is not configured to allocate resources properly to the affected VM.
- C
The hypervisor has failed completely, causing issues with all VMs.
- D
The affected VM has reached its allocated resource limit, such as CPU or RAM.
Show answer and explanation
Correct answer: D
Explanation
When a single VM experiences performance issues while others remain unaffected, the most likely cause is that the VM has reached its resource limits (e.g., CPU, RAM) allocated by the hypervisor. The hypervisor isolates resources for each VM, so resource exhaustion in one VM does not necessarily impact others. Properly monitoring and adjusting resource allocation can resolve such issues.
- A. Incorrect.
If the physical server had insufficient resources overall, it would likely affect all VMs, not just one. Since other VMs are running smoothly, this is not the most likely cause.
- B. Incorrect.
Improper hypervisor configuration could cause resource allocation issues, but this would usually impact multiple VMs or lead to unpredictable behavior across the system. The issue is isolated to one VM, suggesting a different cause.
- C. Incorrect.
If the hypervisor failed completely, all VMs would stop functioning. Since other VMs are unaffected, this is not the correct explanation.
- D. Correct.
The affected VM may have reached its allocated resource limit (e.g., CPU, RAM) set by the hypervisor. This is the most likely cause of performance issues specific to a single VM while others continue to run normally.