VCP Data Analysis & Reporting 4 — Questions and Answers
Question 1: An administrator wants to compare CPU usage across all VMs in a cluster over the past week. Which vRealize Operations feature is best suited for this task?
- Heat Map (Correct answer)
- Alert List
- Log Analysis
- Policy Compliance
Correct answer: Heat Map
Heat Maps in vRealize Operations visually compare metric values across multiple objects simultaneously, making it ideal for cluster-wide CPU usage comparison.
Question 2: What does the 'swapped' memory metric in vSphere indicate about a virtual machine?
- The VM is using ballooning to return memory to the host
- The VM's memory has been written to the VMkernel swap file due to host memory pressure (Correct answer)
- The VM has migrated to a different host via vMotion
- The VM's memory reservation has been exceeded
Correct answer: The VM's memory has been written to the VMkernel swap file due to host memory pressure
Swapped memory indicates that the VMkernel has written the VM's memory pages to a .vswp swap file on disk because the host lacks sufficient physical RAM.
Question 3: In vCenter Server, which rollup type for historical performance data calculates the mean of all samples collected during a rollup period?
- Summation
- Latest
- Minimum
- Average (Correct answer)
Correct answer: Average
The Average rollup type computes the arithmetic mean of all collected samples within a rollup interval, smoothing out short-term spikes.
Question 4: Which vRealize Operations report template is used to show VM rightsizing recommendations based on actual usage patterns?
- Capacity Risk Report
- VM Rightsizing Report (Correct answer)
- Compliance Summary Report
- Alert Volume Report
Correct answer: VM Rightsizing Report
The VM Rightsizing Report in vRealize Operations identifies over-provisioned or under-provisioned VMs by comparing allocated resources to actual utilization.
Question 5: A vSphere administrator observes that network 'dropped packets' metric is increasing for a VM. What is the most likely cause?
- The VM is transmitting duplicate IP packets
- The physical network switch has a misconfigured VLAN
- The network buffer is overwhelmed and packets are being discarded (Correct answer)
- The VM's virtual NIC is in promiscuous mode
Correct answer: The network buffer is overwhelmed and packets are being discarded
Dropped packets occur when the NIC's receive or transmit buffers are overwhelmed and the system cannot process packets fast enough, causing discards.
Question 6: Which vSphere alarm condition should an administrator configure to trigger when a datastore's free space drops below a specific threshold?
- Datastore usage on disk metric (Correct answer)
- Datastore I/O latency metric
- Host disk throughput metric
- VM disk read rate metric
Correct answer: Datastore usage on disk metric
The 'Datastore usage on disk' metric tracks free space percentage and should be used to configure alarms for low datastore capacity conditions.
Question 7: In vRealize Operations, what does 'Reclaimable Capacity' represent in a capacity analysis report?
- Storage space freed by deleting orphaned snapshots only
- Resources that can be recovered by rightsizing over-provisioned VMs (Correct answer)
- Network bandwidth reserved but unused by VMs
- CPU cycles reserved for vSphere HA failover
Correct answer: Resources that can be recovered by rightsizing over-provisioned VMs
Reclaimable Capacity identifies resources currently allocated but not being used, which can be recovered by rightsizing over-provisioned virtual machines.
VCP Data Analysis & Reporting 4
An administrator wants to compare CPU usage across all VMs in a cluster over the past week.
Which vRealize Operations feature is best suited for this task?