VCP Quality Assurance & Improvement 5 — Questions and Answers
Question 1: Which vSphere configuration maximum should be monitored to ensure cluster quality and scalability?
- Maximum number of NFS datastores per host
- All VMware-published configuration maximums for the deployed vSphere version (Correct answer)
- Maximum snapshot depth per VM
- Maximum number of port groups per vSwitch
Correct answer: All VMware-published configuration maximums for the deployed vSphere version
VMware publishes configuration maximums per vSphere version; exceeding any of them can cause instability and is unsupported.
Question 2: What does a consistently high 'Co-Stop' (CSTP) metric in esxtop indicate for a virtual machine?
- The VM has too few vCPUs assigned
- The VM's vCPUs are frequently forced to wait for other vCPUs to be co-scheduled simultaneously (Correct answer)
- The VM's memory is being aggressively ballooned
- The VM's network adapter is dropping packets
Correct answer: The VM's vCPUs are frequently forced to wait for other vCPUs to be co-scheduled simultaneously
Co-Stop occurs when a multi-vCPU VM's virtual CPUs cannot all be scheduled simultaneously, indicating CPU resource contention for SMP VMs.
Question 3: An administrator wants to ensure consistent VM performance during maintenance windows. Which vSphere feature should they use to validate changes don't degrade performance?
- vSphere Update Manager baseline compliance scan
- vSphere Performance Charts before and after comparison (Correct answer)
- vMotion validation check
- ESXi host profile compliance check
Correct answer: vSphere Performance Charts before and after comparison
Comparing vCenter Performance Charts before and after changes provides quantitative evidence of whether the change improved, degraded, or maintained performance.
Question 4: Which ESXi storage path selection policy should be used for active-active storage arrays to improve I/O performance and quality?
- Most Recently Used (MRU)
- Fixed
- Round Robin (Correct answer)
- Fixed with preferred path
Correct answer: Round Robin
Round Robin distributes I/O across all available paths to active-active arrays, maximizing throughput and providing path-level load balancing.
Question 5: What is the recommended approach for capacity planning quality assurance in a vSphere environment?
- Purchase new hardware only when hosts reach 100% CPU utilization
- Maintain headroom by keeping average cluster utilization below 80% to handle failures and spikes (Correct answer)
- Size each host at maximum capacity to minimize hardware costs
- Rely solely on vSphere HA to handle any capacity shortfalls
Correct answer: Maintain headroom by keeping average cluster utilization below 80% to handle failures and spikes
Keeping average cluster utilization below 80% ensures sufficient headroom for host failure scenarios, traffic spikes, and HA failover resource requirements.
Question 6: Which vSphere health check feature automatically identifies misconfigurations that could impact cluster stability?
- vSphere DRS recommendations
- vSphere Cluster Health Status checks (Correct answer)
- ESXi DCUI system logs
- vCenter Task and Events log
Correct answer: vSphere Cluster Health Status checks
vSphere Cluster Health Status continuously checks cluster configuration for issues like mismatched MTU settings, EVC compatibility problems, and HA configuration errors.
Question 7: What is the purpose of vSphere Proactive HA in improving infrastructure quality?
- Automatically patches ESXi hosts during off-peak hours
- Evacuates VMs from hosts showing early signs of hardware degradation before a full failure occurs (Correct answer)
- Rebalances VM placement based on predicted workload trends
- Automatically provisions additional hosts when cluster capacity is low
Correct answer: Evacuates VMs from hosts showing early signs of hardware degradation before a full failure occurs
Proactive HA integrates with hardware health sensors to detect degraded components and evacuate VMs before the component fully fails, preventing unplanned downtime.
VCP Quality Assurance & Improvement 5
Which vSphere configuration maximum should be monitored to ensure cluster quality and scalability?