VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

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What action should be taken if a virtual machine is experiencing memory performance issues?

Disable the balloon driver in the VM
Ensure VMware Tools is installed on all VMs
Increase the memory reservation setting
Power off the VM

The correct answer is: Ensure VMware Tools is installed on all VMs

Installing VMware Tools on all virtual machines is essential for optimal performance and functionality within a VMware environment. This suite of utilities enhances the handling of system resources, enabling better memory management features. When VMware Tools is installed, it allows for the use of advanced memory management techniques, such as memory ballooning, which can dynamically free up memory resources when the host is under memory pressure. By ensuring VMware Tools is installed, the virtual machine can benefit from improved interaction with the hypervisor, meaning memory performance issues may be mitigated since the VM can utilize the available resources more efficiently. This setup also helps to avoid potential bottlenecks that could arise from the virtual machine not communicating effectively with the hypervisor regarding its memory needs. In contrast, disabling the balloon driver would prevent the VM from participating effectively in VMware's memory management strategies, potentially worsening memory performance rather than improving it. Increasing the memory reservation could alleviate performance issues but doesn’t address the underlying conflicts that may be remedied through proper installation of the VMware Tools. Powering off the VM does not directly resolve the performance issues and disrupts services unnecessarily. Thus, ensuring that VMware Tools is installed is a proactive step that addresses the root of many memory performance concerns within virtual machines.