VMware VCTA vSphere Monitoring Troubleshooting

1. Which command-line tool in ESXi is used to capture real-time performance metrics?

Esxcli system

Esxtop

Vmstat

Netstat

2. In vSphere troubleshooting, what does 'Disk Queue Length' measure?

Number of snapshots pending deletion

Storage I/O requests waiting for completion

VM disk space remaining

VMFS datastore fragmentation level

3. Which vSphere tool provides real-time system performance visibility without accessing vCenter?

VSphere Web Client

Esxtop interactive utility

VCenter Performance Charts

VM Guest Tools only

4. What is the primary function of vSphere Distributed Resource Scheduler (DRS) in troubleshooting?

Monitor VM disk usage

Balance resource utilization across hosts

Encrypt VM data

Manage storage replication

5. Which monitoring metric helps identify VM migration candidates in a vSphere cluster?

CPU Ready and Memory Contention

Storage I/O only

Network throughput only

VM snapshot count

6. In vSphere, what does 'Memory Shared' indicate?

Memory allocated to multiple VMs

Memory pages shared between VMs via TPS

Total host memory capacity

Memory reserved for vCenter

7. Which vSphere feature allows you to monitor and troubleshoot virtual network performance?

Port Mirroring (SPAN)

VNetwork Distributed Switch (vDS)

NetFlow monitoring

All of the above

8. What does 'CPU Overlap' indicate in vSphere performance troubleshooting?

Multiple VMs on same host

CPU context switching overhead

VCPU allocation exceeds physical cores

Hyper-threading enabled

9. Which vCenter log file tracks VM configuration changes and events?

/var/log/vmkernel.log

/var/log/hostd.log

/var/log/vpxa.log

/var/log/audit.log

10. In vSphere, what does 'Storage Latency' measure?

Total storage capacity used

Time for I/O requests to complete

Network bandwidth to storage

VM snapshot size

11. Which vSphere component is primarily responsible for real-time performance monitoring across hosts and VMs?

VCenter Performance Charts

ESXi Direct Console Interface (DCUI)

VSAN Health Service

VSphere Web Client only

12. What is the primary cause of high 'Network Dropped Packets' on a vSphere host?

Insufficient vNIC bandwidth

Network switch misconfiguration

VM oversubscription

Physical NIC saturation or driver issues

13. Which vSphere monitoring feature alerts you when resource thresholds are exceeded?

Performance Baselines

Alarms and Conditions

Event Logs

Historical Charts

14. In vSphere troubleshooting, what does the term 'coredump' refer to?

VM backup file

Memory dump of ESXi kernel panic

Compressed log archive

Storage snapshot data

15. Which vSphere tool is used to analyze and export performance data for historical trend analysis?

VSphere Performance Monitor

VCenter Statistics

Real-time Performance Charts

ESXi Web Client Graphs

16. What does the 'Balloon Driver' in vSphere help troubleshoot?

Network latency issues

Memory pressure on the host

CPU oversubscription

Storage I/O bottlenecks

17. Which metric indicates memory contention on a vSphere host?

Memory Usage

Memory Swap Used

Memory Provisioned

Memory Allocated

18. In vSphere, what is the primary purpose of the vCenter Server Appliance (VCSA) health monitoring service?

Monitor VM CPU usage only

Monitor vCenter services and system health

Replace ESXi host monitoring

Manage network switches

19. Which log file on an ESXi host contains system-level events and errors?