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← vSphere Performance and Scaling practice sets

VCP-DCV vSphere Performance and Scaling • Complete Question Bank

VCP-DCV vSphere Performance and Scaling — All Questions With Answers

Complete VCP-DCV vSphere Performance and Scaling question bank — all 0 questions with answers and detailed explanations.

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Certifications/VCP-DCV/Practice Test/vSphere Performance and Scaling/All Questions
Question 1mediummultiple choice
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A company's vSphere environment has multiple clusters with varying workloads. The operations team notices that one cluster consistently shows high CPU ready times on several hosts. Which action should be taken to address this performance issue?

Question 2hardmultiple choice
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An administrator wants to ensure that a critical database VM has consistent low-latency access to its virtual disks. The VM currently resides on a datastore backed by a hybrid array. Which configuration change best meets this requirement?

Question 3easymultiple choice
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A vSphere administrator is planning the storage configuration for a new cluster of 10 hosts running VDI workloads. Each VM requires approximately 100 IOPS for typical operation. Which storage design best balances performance and scalability?

Question 4mediummultiple choice
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During a performance review, an administrator notices that a VM with 4 vCPUs and 16 GB memory is experiencing over 10% CPU ready time. The host has two 8-core sockets (hyper-threading enabled) and 256 GB memory. The host runs 15 other VMs with varying CPU loads. What is the most likely cause?

Question 5hardmultiple choice
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A company runs a large vSphere environment with multiple clusters using vSAN. The performance team observes that some VMs are experiencing high latency on reads. The vSAN cluster is configured with 5 hosts, each having one cache tier (NVMe) and one capacity tier (SATA SSD). The VMs are all-flash storage policies. What should the administrator check first?

Question 6easymultiple choice
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An administrator wants to ensure that VMs running latency-sensitive applications are placed on hosts that minimize CPU scheduling delays. Which DRS setting should be configured?

Question 7mediummultiple choice
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A vSphere administrator is troubleshooting a VM that is experiencing excessive disk latency. The VM is on a datastore accessed via NFS over a 1GbE network. The host shows high network utilization. Which action should be taken to improve performance?

Question 8hardmultiple choice
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An administrator is designing a new vSphere cluster for a mission-critical application that requires extremely low network latency between VMs within the same cluster. The cluster will use vSphere vMotion for maintenance. Which network configuration best meets these requirements?

Question 9mediummulti select
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Which TWO factors contribute to increased CPU ready time on a vSphere host?

Question 10hardmulti select
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Which THREE actions would help reduce network latency for VMs in a vSphere environment?

Question 11easymulti select
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Which TWO are valid methods to monitor vSphere performance metrics?

Question 12hardmultiple choice
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Refer to the exhibit. The performance data shows MEMCTL at 5% and SWPOUT at 2%. What does this indicate about the host?

Exhibit

Refer to the exhibit.
```
esxtop -b -d 30 -n 2 > /tmp/perf.csv
# Sample output (abbreviated):
# CPU(%): 10.5, 12.3, 8.9, ...
# PMEM(%): 65, 70, 68, ...
# MEMCTL(%): 5, 4, 3, ...
# SWPOUT(%): 2, 1, 0, ...
```
Question 13mediummultiple choice
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Refer to the exhibit. A distributed virtual switch port shows dropped Rx packets and CRC errors. What is the most likely cause?

Exhibit

Refer to the exhibit.
```
# dvs_port_statistics (partial)
Port ID: 1234
Packets Received: 15000000
Packets Transmitted: 10000000
Dropped Rx: 150
Dropped Tx: 10
Rx CRC Errors: 10
```
Question 14hardmultiple choice
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Your company has a vSphere 7 environment with four clusters: Cluster-A (production VMs), Cluster-B (development), Cluster-C (database), and Cluster-D (VDI). Each cluster has 8 hosts with 256 GB RAM and dual 12-core CPUs (hyper-threading enabled). The environment uses vSAN for storage, with all-flash disk groups (1 NVMe cache + 4 SATA SSD capacity per host). You are the lead administrator. Recently, users in the VDI cluster (Cluster-D) report slow logins and application responsiveness during peak hours (9-11 AM). You examine the vSAN performance metrics and see that the cache hit ratio during peak hours drops to 60%, and the average read latency is 15 ms. The VMs are thin provisioned and use a storage policy with RAID-1 mirroring (FTT=1). The cluster has DRS enabled with default migration threshold. What should you do to improve VDI performance without disruptive changes?

Question 15mediummulti select
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You manage a vSphere 7 environment with 20 hosts, each with 2 x 10-core CPUs and 512 GB RAM. The environment runs 300 VMs, including a critical ERP application that uses 8 vCPUs and 64 GB RAM. Recently, the ERP VM has been experiencing periodic performance degradation, especially during month-end processing. The host running the ERP VM shows CPU ready time averaging 8%, with spikes to 20% during the processing. The host has 10 other VMs, each with 2-4 vCPUs. The cluster has DRS enabled with default settings. You suspect CPU contention. Which two actions should you take to mitigate the issue? (Choose two.)

Question 16mediummultiple choice
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A virtualized SQL server is experiencing high latency on its virtual disks. The datastore is an NFS mount on a shared NAS. Which action would most likely reduce disk latency without reducing capacity?

Question 17hardmultiple choice
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An administrator notices that a critical VM running a database has a high CPU ready time average (over 20%) on a host with 2 physical CPUs (16 cores each). The host is running 6 VMs, each with 8 vCPUs. What is the most likely cause of the high ready time?

Question 18easymultiple choice
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A vSphere administrator needs to monitor the performance of a cluster of 10 ESXi hosts. The cluster is running 200 VMs. Which tool provides real-time performance metrics and historical data with the least overhead?

Question 19hardmultiple choice
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A company has a cluster with DRS set to Fully Automated. A VM named VM1 has a reservation of 4 GHz and a limit of 8 GHz on a host with 10 GHz available. The VM is running a batch job that requires as much CPU as possible. The administrator notices that the VM's CPU usage never exceeds 4 GHz. What is the most likely reason?

Question 20mediummultiple choice
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An administrator is troubleshooting a VM that is running slowly. The VM has 4 vCPUs and 16 GB of memory. The host has 2 physical CPUs with 10 cores each, hyper-threading enabled. The administrator runs esxtop and sees that %RDY for the VM is consistently above 15%. Which action would most likely reduce the ready time?

Question 21mediummulti select
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Which TWO actions can help reduce network latency for a latency-sensitive VM in a vSphere environment? (Choose two.)

Question 22hardmulti select
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Which THREE factors should be considered when sizing a host cluster for a VDI environment with 1000 desktops? (Choose three.)

Question 23hardmultiple choice
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A company runs a 3-node vSAN cluster with all-flash configuration. Each host has 2 CPUs (8 cores each) and 256 GB RAM. The cluster hosts 30 VMs, including a critical database VM with 8 vCPUs and 64 GB RAM. Recently, users report that the database VM is slow during peak hours. The administrator checks vCenter performance charts and sees that the VM's CPU ready time averages 10%, and the vSAN latency spikes to 15 ms during peak hours. The storage policy for the database VM is set to RAID-1 mirroring with 2 failures to tolerate (FTT=2). The cluster is configured with 3 disk groups per host, each with one 400 GB NVMe cache SSD and two 2 TB SAS SSD capacity drives. Which action would most improve the performance of the database VM?

Question 24easymulti select
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An administrator is troubleshooting performance issues on a vSphere cluster. Which TWO metrics should be monitored to identify CPU ready time contention?

Question 25hardmultiple choice
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Refer to the exhibit. An administrator runs the command on an ESXi host to check HTTPS connections. The host is running vCenter Server and several VMs. What is the most likely cause of the TIME_WAIT connection?

Exhibit

Refer to the exhibit.

esxcli network ip connection list | grep 443
tcp 0 0 192.168.10.10:443 192.168.10.20:54321 ESTABLISHED 131230
tcp 0 0 192.168.10.10:443 192.168.10.21:54322 ESTABLISHED 131231
tcp 0 0 192.168.10.10:443 192.168.10.22:54323 TIME_WAIT 0
tcp 0 0 192.168.10.10:443 192.168.10.23:54324 ESTABLISHED 131232
Question 26mediummultiple choice
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A company runs a four-node vSphere 7 cluster with all-flash storage and 25GbE networking. The cluster hosts 50 VMs, including a critical database VM with 16 vCPUs and 64 GB memory. The database VM's performance has degraded over the past week. vCenter reports high CPU ready time (average 15%) for the database VM, while other VMs show less than 2%. CPU utilization on the host is 70%. The database VM is configured with CPU affinity pinned to cores 0-15 on a dual-socket host with 16 cores per socket (32 total). The administrator also notices that the database VM's CPU co-stop counter is high. What should the administrator do to improve performance?

Question 27mediumdrag order
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Arrange the steps to add an existing virtual machine to a vCenter Server inventory.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps
Order
1Step 1
2Step 2
3Step 3
4Step 4
5Step 5
Question 28mediummatching
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Match each vSphere command-line tool to its purpose.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts
Matches

Command-line interface for ESXi management

Command for vCenter and host operations

Tool for managing VMFS and virtual disks

vSphere Sysinfo Shell for debugging

Performance monitoring tool for ESXi resources

Question 29easymultiple choice
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A company has a cluster of 4 ESXi hosts. They want to ensure that virtual machines are automatically distributed evenly across hosts based on CPU and memory load. Which feature should be enabled on the cluster?

Question 30mediummultiple choice
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A vSphere administrator notices that a VM running a critical database is experiencing high latency on its virtual disk. The VM uses a VMDK on a datastore shared by several other VMs. The datastore is backed by an all-flash array. Which action would best reduce latency without increasing storage capacity?

Question 31hardmultiple choice
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An administrator has a vSphere 7 cluster with vMotion enabled. They need to perform a vMotion of a VM from host1 to host2 while preserving the VM's memory state. The VM has a PCIe passthrough device assigned (NVMe controller). What should the administrator do before initiating the vMotion?

Question 32mediummultiple choice
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A vSphere environment experiences periodic performance degradation during peak business hours. Analysis shows that one ESXi host's CPU ready time for a specific mission-critical VM is consistently above 20%. Which corrective action should be taken first?

Question 33easymultiple choice
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Which tool provides real-time performance monitoring at the ESXi host level, including CPU, memory, network, and storage metrics?

Question 34hardmultiple choice
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A vSAN stretched cluster is configured with two witness hosts to allow for site failures. Performance troubleshooting reveals that write latency for synchronous writes is higher than expected for cross-site operations. Which setting should be reviewed as a likely cause?

Question 35mediummultiple choice
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An administrator is planning to scale a vSphere cluster from 8 to 16 hosts. Which consideration is most important for maintaining vSphere HA effectiveness?

Question 36easymultiple choice
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A VM configured with 4 vCPUs shows high co-stop time in performance metrics. What does co-stop time indicate and which action should be taken to improve performance?

Question 37hardmultiple choice
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In a vSphere 8 environment with vGPU vMotion enabled, an administrator attempts a vMotion of a VM that has a NVIDIA vGPU profile assigned. The vMotion fails with an error. What is the most likely cause?

Question 38mediummulti select
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Which TWO actions can be taken to reduce CPU ready time for a virtual machine? (Select TWO.)

Question 39hardmulti select
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Which THREE vSphere features directly contribute to performance and scaling of virtualized workloads? (Select THREE.)

Question 40mediummulti select
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Which TWO conditions are required for a successful vMotion of a powered-on virtual machine? (Select TWO.)

Question 41hardmultiple choice
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Refer to the exhibit. The vSphere administrator observes that vm1 has a %RDY value of 20.5. What is the most likely cause of this high ready time?

Exhibit

esxtop output:

   VM      CPU%  %RDY  %CSTP  %MLMTD  %SWPWT  %LCLM  %VMWAIT
   vm1    95.2  20.5   0.8     0.0     0.0     0.0    1.2
   vm2    30.1   5.2   0.0     0.0     0.0     0.0    0.5
   vm3    12.3   3.1   0.0     0.0     0.0     0.0    0.2
Question 42mediummultiple choice
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Refer to the exhibit. An administrator sees two DRS recommendations. Which action should the administrator take first to reduce cluster imbalance?

Exhibit

vSphere DRS recommendation output:

Cluster: Production

Current load imbalance: 30%

Recommended migrations:
1. Move VM 'Web01' from host01 (CPU usage 85%) to host04 (CPU usage 30%)
   Benefit: Improve balance by 10%
2. Move VM 'DB01' from host03 (CPU usage 90%) to host04 (CPU usage 30%)
   Benefit: Improve balance by 15%

Note: host04 is in power-on state and has sufficient resources.
Question 43easymultiple choice
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Refer to the exhibit. The administrator is troubleshooting performance for VM 'vm2'. Based on the log, what is the performance issue?

Exhibit

Log file snippet:

2025-03-01T10:15:23.456Z cpu10:VMKB: vm2: vcpu-0: CPU ready time: 3000ms (3.0%)
2025-03-01T10:15:23.456Z cpu10:VMKB: vm2: vcpu-1: CPU ready time: 2800ms (2.8%)
2025-03-01T10:15:23.456Z cpu10:VMKB: vm2: vcpu-2: CPU ready time: 3100ms (3.1%)
2025-03-01T10:15:23.456Z cpu10:VMKB: vm2: vcpu-3: CPU ready time: 2900ms (2.9%)
Question 44mediummultiple choice
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An administrator notices that a critical virtual machine is running slowly. The VM has 8 vCPUs and 32GB memory. The host is an ESXi 7.0 server with two Intel Xeon Gold 6248 sockets (20 cores each, hyperthreading enabled). The VM's CPU ready time is consistently above 10%. What is the most likely cause?

Question 45easymultiple choice
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A company uses vSphere 7 with Distributed Resource Scheduler (DRS). They want to ensure that VMs are migrated to hosts with more available resources during peak load. Which default DRS setting controls the aggressiveness of initial placement and migration?

Question 46hardmultiple choice
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A vSphere administrator is troubleshooting a performance issue on a VM that has high average latency on its virtual disks. The VM is stored on a VMFS datastore backed by an all-flash array. The VM has 4 vCPUs and 16GB memory. The administrator runs esxtop and sees %USEDRDY: 0.5, %MLMTD: 10, %SWPWT: 0. What is the most likely cause of the high disk latency?

Question 47mediummultiple choice
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An administrator is monitoring a vSphere cluster with 10 hosts. They notice that vCenter Server is responding slowly when performing operations such as creating VMs or applying host profiles. CPU and memory on the vCenter Server are within normal limits. What is the most likely cause?

Question 48hardmultiple choice
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A vSphere administrator is tasked with scaling a cluster to support a new workload that requires high network throughput. The existing hosts have 10GbE NICs and are using the default vmnic driver. Which technology can improve network performance without additional hardware?

Question 49easymultiple choice
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An administrator wants to limit the amount of CPU resources a single VM can consume in a vSphere cluster. Which feature should be used?

Question 50mediummultiple choice
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A VM with a large memory footprint is experiencing high swap rates. The host has free memory but the swap rate is still high. What is the most likely cause?

Question 51hardmultiple choice
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An administrator is deploying a latency-sensitive application in a vSphere environment. The application requires consistent low-latency network access. Which configuration would be the best practice to minimize network latency for this VM?

Question 52easymultiple choice
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A vSphere cluster with DRS enabled is experiencing an imbalance in resource utilization across hosts. DRS is set to 'Manual' mode. What action should the administrator take to resolve the imbalance?

Question 53mediummulti select
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Which TWO options are valid methods to reduce vSphere storage latency? (Select two.)

Question 54hardmulti select
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Which THREE techniques are recommended to improve virtual machine network performance in a vSphere environment? (Select three.)

Question 55easymulti select
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Which TWO are correct statements about vSphere resource pools? (Select two.)

Question 56mediummultiple choice
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Refer to the exhibit. Based on the esxtop output, what is the likely cause of performance degradation for VM 'AppSrv'?

Exhibit

esxtop -b memory

   MEM(cpu)  %USED  %SYS  %WAIT %RDY  %MLMTD %CSTP  %SWPWT
     CPU0    0.5    0.0   99.5  0.0   0.0    0.0    0.0
     CPU1    1.0    0.5   98.5  0.0   0.0    0.0    0.0
   Global:   %MLMTD: 0.0   %SWPWT: 0.0
   VM 'AppSrv'  %USEDRDY: 0.2  %MLMTD: 8.5  %SWPWT: 0.0  %CSTP: 0.0  MCTLSZ: 2.0GB
Question 57easymultiple choice
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Refer to the exhibit. What is the most likely cause of the vSAN cluster health degradation?

Exhibit

root@esxi-host1 [~] esxcli vsan health cluster list
Cluster Health: Degraded
    vSAN Cluster: Datacenter-Cluster
    Overall Health: Degraded
    - vSAN Capacity Health: Warning - Host 'esxi-host2' crossed disk utilization threshold (80%)
    - vSAN Object Health: Healthy
    - vSAN Network Health: Healthy
    - vSAN Performance Service: Healthy
Question 58hardmultiple choice
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Refer to the exhibit. Based on the performance chart, which component is likely causing the VM to experience a bottleneck?

Exhibit

Description of performance chart for VM 'SQLServer':
- CPU Usage: Average 70%, Max 85%
- Memory Usage: Average 60%, Max 75%
- Disk Read Latency: Average 60ms, Max 120ms
- Disk Write Latency: Average 30ms, Max 80ms
- Network Throughput: Average 100 Mbps
Question 59mediummultiple choice
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A vSphere administrator notices that one ESXi host in a DRS-enabled cluster is consistently running at 95% CPU utilization while other hosts average 40%. Which action should the administrator take to determine the cause?

Question 60easymultiple choice
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Which setting must be consistent across all hosts in a vMotion migration to ensure that virtual machines maintain optimal performance after migration?

Question 61hardmultiple choice
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A VMware vSphere cluster uses vSphere Fault Tolerance (FT) for a critical virtual machine with 4 vCPUs. The administrator notices increased latency and CPU ready time on the primary VM. What is the most likely cause?

Question 62mediummultiple choice
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An administrator configures a resource pool with a CPU reservation and expandable reservation enabled. The root resource pool has 100% of cluster CPU resources. A VM inside the resource pool with no reservation requests CPU resources. What will happen when the VM tries to power on?

Question 63easymultiple choice
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An administrator is planning a vMotion migration and wants to minimize the performance impact on the virtual machines during the migration. Which network configuration is recommended?

Question 64hardmultiple choice
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An ESXi host experiences high memory ballooning in virtual machines. The administrator checks the host's memory metrics and sees a high swap rate. The host has 512 GB of memory, and the VMs are configured with memory reservations. Which configuration is most likely contributing to the excessive swapping?

Question 65mediummultiple choice
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A vSphere cluster has 10 ESXi hosts configured with vSphere DRS. The administrator wants to ensure that a group of VMs running a latency-sensitive application are always placed on the same host. Which DRS rule should be created?

Question 66easymultiple choice
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What is the maximum number of virtual CPUs (vCPUs) that can be allocated to a virtual machine on vSphere 8 Enterprise Plus?

Question 67hardmultiple choice
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An administrator is troubleshooting a virtual machine that experiences intermittent performance issues. The VM is configured with 8 vCPUs and 32 GB memory. The administrator runs esxtop and sees that the %RDY for the VM is consistently above 20%. What does this indicate?

Question 68mediummulti select
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Which TWO conditions must be met for a successful Storage vMotion of a virtual machine with a raw device mapping (RDM) in physical compatibility mode?

Question 69hardmulti select
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Which THREE factors should be considered when designing a vSphere environment to minimize vCPU overcommitment and improve performance for CPU-intensive workloads?

Question 70easymulti select
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Which TWO actions are valid for optimizing network performance for vSphere clusters configured with Network I/O Control (NIOC)?

Question 71easymultiple choice
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A VM is experiencing high CPU ready time. The host has 16 physical cores and 20 vCPUs total across all VMs. Which action is MOST likely to reduce the CPU ready time on the VM?

Question 72mediummultiple choice
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A large VM with 24 vCPUs is deployed on a dual-socket host with two NUMA nodes each having 12 cores. Which step is a BEST PRACTICE to ensure optimal performance for this VM?

Question 73hardmultiple choice
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A vSphere administrator observes that a VM's memory usage is high, and the host memory is overcommitted. The VM has a memory balloon driver installed and running. Which metric in esxtop would the administrator check to confirm that ballooning is reclaiming memory?

Question 74easymultiple choice
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A vSphere cluster has DRS enabled and hosts with unbalanced resource usage. Which DRS feature automatically migrates VMs to balance CPU and memory loads across hosts?

Question 75mediummultiple choice
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An administrator monitors network performance using esxtop. Which field in the network section indicates the total number of packets dropped per second due to the virtual switch being overrun?

Question 76hardmultiple choice
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A vSphere administrator notices that a VM is performing poorly on a host with a single NUMA node. The VM has 16 vCPUs and 64 GB of memory, but the host has only 32 GB of memory per NUMA node. Which action would MOST LIKELY improve performance?

Question 77easymultiple choice
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A resource pool has the following configuration: CPU shares = 4000, reservation = 2 GHz, limit = 4 GHz. The parent cluster has 10 GHz total CPU capacity. Another resource pool contains VMs with higher shares. If both resource pools contend for CPU, which statement is TRUE?

Question 78mediummultiple choice
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An administrator observes that a VM with 4 vCPUs running on a host with hyperthreading enabled shows high %CSTP (co-stop) values in esxtop. What is a likely cause?

Question 79hardmultiple choice
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A database VM with 32 vCPUs and 256 GB memory is deployed on a host with two NUMA nodes, each with 8 cores (16 threads with HT). The application performs badly. Analysis shows high remote memory access. What is the MOST LIKELY reason?

Question 80easymulti select
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Which TWO actions are effective in reducing CPU ready time on a vSphere host that is heavily overcommitted on CPU? (Choose two.)

Question 81mediummulti select
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Which THREE memory-related metrics in esxtop indicate that a virtual machine is experiencing memory pressure? (Choose three.)

Question 82hardmulti select
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Which TWO storage performance best practices should be followed when scaling a vSphere environment using shared storage? (Choose two.)

Question 83easymultiple choice
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Based on the exhibit, which VM (indicated by the row) is most likely experiencing severe CPU scheduling contention?

Exhibit

Refer to the exhibit.

CPU section from esxtop:
  %CPU  %MEM    %RDY   %MLMTD   %SWPWT - %VMWAIT
  12.5   8.0    2.3     0.0      0.0      0.2
  22.1  15.0   15.5     0.0      0.1      0.3
  5.0    4.0    0.5     0.0      0.0      0.1
  45.0  20.0   30.0     0.0      0.5      0.4
Question 84mediummultiple choice
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Based on the exhibit, which statement about the virtual machine's memory state is TRUE?

Exhibit

Refer to the exhibit.

Memory section from resxtop:
  MCTLSZ   MEMSZ    SWCUR    SWR/s    SWW/s
    0.0    4096     512      10       5
Question 85hardmultiple choice
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Based on the exhibit, which statement about vNUMA exposure to virtual machines is correct?

Exhibit

Refer to the exhibit.

Host advanced system settings related to vNUMA:
  numa.vcpu.minPerMachine = "4"
  numa.vcpu.maxPerMachine = "8"
Question 86easymultiple choice
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A company's vSphere environment experiences intermittent performance degradation on a critical virtual machine. The VM has 8 vCPUs allocated, and the host has 16 physical cores (2 sockets, 8 cores each). The VM is configured with Hyper-Threading enabled. Which action is most likely to improve performance without increasing resource allocation?

Question 87easymultiple choice
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A vSphere administrator notices high memory ballooning on a host running multiple VMs with large memory allocations. The host has sufficient physical memory, but ballooning occurs sporadically. What is the most likely cause?

Question 88easymultiple choice
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An administrator wants to maximize performance for a latency-sensitive application running on a VM. The host has two NUMA nodes. Which vSphere feature should be configured to ensure the VM's memory is allocated from the same NUMA node as its vCPUs?

Question 89mediummultiple choice
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A vSphere cluster has DRS enabled with 'Partially automate' mode. A VM is consistently showing high CPU ready time. The administrator wants to ensure the VM is automatically migrated to a less loaded host. What must be done?

Question 90mediummultiple choice
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An administrator observes that a VM with 16 vCPUs on a 2-socket host (8 cores per socket, HT disabled) is experiencing poor performance. The VM's NUMA topology shows 2 vNUMA nodes, but performance is worse than expected. What is the most likely reason?

Question 91mediummultiple choice
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A vSphere administrator is troubleshooting a VM that shows high 'CPU ready' time in vCenter performance charts. The host has 32 logical CPUs (16 cores with HT). Which tool should be used to identify which other VMs are contending for CPU resources?

Question 92hardmultiple choice
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An administrator configures a resource pool with a reservation of 10 GHz and a limit of 20 GHz. The pool contains two VMs: VM1 has a reservation of 6 GHz and no limit, VM2 has no reservation and a limit of 8 GHz. The host has only 12 GHz available. During peak usage, both VMs demand more than their shares. Which statement is true?

Question 93hardmultiple choice
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A vSphere cluster uses vSAN with deduplication and compression enabled. An administrator notices that IOPS for a VM is lower than expected despite low CPU and memory utilization on hosts. Which of the following is most likely the cause?

Question 94hardmultiple choice
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An administrator configures a VM with 4 vCPUs and 32 GB memory on a host with 128 GB RAM and 8 cores (HT enabled). The VM runs a database that requires high memory bandwidth. Performance monitoring shows low CPU usage but high memory latency. Which configuration change is most likely to improve memory performance?

Question 95easymulti select
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Which two factors most directly influence vSphere NUMA scheduling decisions for a VM? (Choose two.)

Question 96mediummulti select
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Which three actions can reduce CPU ready time for a virtual machine in a vSphere cluster? (Choose three.)

Question 97hardmulti select
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An administrator is troubleshooting a VM that is running slowly. Esxtop shows the VM has high %SWPWV (swap wait). Which three conditions could cause this? (Choose three.)

Question 98easymultiple choice
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A small financial services company runs a critical trading application on a single vSphere host with two NUMA nodes (each with 8 cores). The VM is configured with 12 vCPUs and 64 GB memory. The application is not yet live, but load testing shows that CPU performance is satisfactory, but memory bandwidth is lower than expected. The application is known to benefit from fast memory access within a single NUMA domain. The administrator notices that the VM's memory is spread across both NUMA nodes. The administrator wants to force the VM to use only one NUMA node to maximize performance. However, the VM requires 12 vCPUs, which exceeds the 8 physical cores per node. What is the best course of action to improve memory bandwidth for this VM?

Question 99mediummultiple choice
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A large e-commerce company has a vSphere cluster with 16 hosts, each with 2 sockets of 10 cores (HT enabled) and 512 GB RAM. They run a mix of web and database VMs. During the holiday season, some VMs experience high CPU ready time, especially the database VMs. DRS is set to Fully Automated and migration thresholds are at default. The administrator notices that the cluster's CPU utilization averages at 60%, but some hosts are at 90% while others are at 30%. The VMs with high ready time are all on the highly utilized hosts. To resolve this, the administrator considers several options. Which action will most effectively balance CPU load and reduce ready time for the database VMs?

Question 100hardmultiple choice
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A managed hosting provider uses vSphere 7 with vSAN to run customer VMs. One customer's VM is a SQL Server database with 8 vCPUs and 128 GB RAM. The administrator notices that the VM's performance during peak hours is poor, with high disk latency and occasional disconnects. The cluster has 4 hosts, each with 10 cores (HT enabled) and 256 GB RAM. vSAN is configured with a hybrid disk group (SSD cache, HDD capacity) per host. The VM's storage policy is set to 'Performance' with RAID-1 mirroring (2 copies). The administrator runs esxtop and sees high %DAVG (device average latency) for the VM's vmdk. The observed latency averages 30 ms, but spikes to 100 ms. The host where the VM is running has relatively low CPU and memory usage, and the vSAN cache is not full. Which of the following is the most likely root cause and recommended solution?

Question 101mediummultiple choice
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A vSphere administrator is troubleshooting a VM that hosts a critical database. The VM is configured with 8 vCPUs and 64 GB memory on an ESXi host with two 10-core CPUs (hyperthreading enabled). Performance charts show CPU ready time averaging 12% during peak hours, and the database application is experiencing high transaction latency. The administrator has verified that no other VMs are contending for CPU. Which action will most likely reduce CPU ready time without negatively impacting database performance?

Question 102easymulti select
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An administrator is analyzing performance data for a vSphere cluster and wants to identify VMs that are experiencing memory pressure. Which two metrics from esxtop or vCenter performance charts reliably indicate that a VM is actively reclaiming memory due to contention? (Choose two.)

Question 103hardmulti select
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A vSphere cluster is experiencing high CPU ready time across multiple hosts during peak hours. The cluster consists of 8 hosts, each with 2 sockets and 8 cores per socket (hyperthreading enabled). DRS is set to a moderately aggressive migration threshold. The administrator needs to reduce CPU contention without disrupting workloads. Which three actions should the administrator consider? (Choose three.)

Question 104easymultiple choice
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A financial services company has a vSphere cluster with four hosts, each equipped with 2 CPU sockets (10 cores each, hyperthreading enabled) and 512 GB RAM. The cluster runs a mix of production and test VMs. Recently, a critical trading application VM (8 vCPUs, 64 GB RAM) was moved by DRS to a host that also runs an analytics workload (4 vCPUs, 32 GB RAM). After the move, the trading application's performance degraded significantly. The administrator checks vCenter performance charts and sees that the trading VM's CPU ready time has increased from 2% to 20% since the migration, while the host's overall CPU utilization is only 50%. The analytics VM shows normal performance. What is the most likely cause of the performance degradation?

Question 105mediummultiple choice
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A company has a vSphere 7 cluster with 6 hosts, each with 2 sockets (16 cores per socket, hyperthreading enabled) and 1 TB RAM. The cluster uses DRS with a migration threshold of 4 (moderate). A single VM runs a latency-sensitive trading platform with 12 vCPUs and 256 GB RAM. During market hours, the administrator notices that the VM's CPU ready time spikes to 15%, and the application reports high response times. The administrator runs esxtop on the host and sees the following: %RDY for the VM is 15%, %CSTP is low, and the host's overall CPU utilization is 60%. The VM is on a host that also has 5 other VMs with smaller resource footprints. The administrator wants to minimize disruption while improving performance. Which action should the administrator take first?

Question 106hardmultiple choice
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A vSphere administrator manages a cluster for a VDI workload using VMware Horizon. Each virtual desktop runs a GPU-intensive application and is assigned a vGPU profile (profile: grid_m60-1q) with 4 vCPUs and 8 GB RAM. The ESXi hosts are equipped with NVIDIA M60 GPUs (each host has 2 GPUs, each with 2 physical GPUs? Actually M60 has 2 GPUs on one card, but let's keep generic). The administrator receives complaints of poor graphics performance and high latency. The administrator runs esxtop and observes that the total CPU utilization for the hosts is low (average 30%), but the GPU memory utilization is consistently above 95%, and the vGPU scheduler reports high 'GPU mem' wait times. The number of VMs per host is within the GPU profile limits. What is the most effective way to improve performance?

Question 107easymultiple choice
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A vSphere cluster with 3 ESXi hosts (each with 2 sockets, 8 cores per socket, hyperthreading enabled, and 256 GB RAM) runs a set of web server VMs. The cluster is configured with DRS enabled and a migration threshold of 3 (conservative). The administrator notices that one host has consistently high CPU ready time (average 15%) while the other two hosts have ready time below 2%. The host with high ready time has 10 VMs, while the others have 6 each. CPU utilization on the busy host is 80%, while on the other hosts it is 40%. What should the administrator do to improve the situation with minimal disruption?

Question 108mediummultiple choice
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A company runs a critical application on a VM with 16 vCPUs and 128 GB RAM on an ESXi host that has 2 sockets (12 cores per socket, hyperthreading enabled) and 512 GB RAM. The application is known to scale well with multiple threads and memory bandwidth. Recently, a DRS migration moved the VM to a different host with the same CPU and memory configuration. After the migration, the application's performance dropped by 30%. The administrator checks vCenter and finds no other VMs on the destination host. esxtop shows the VM's CPU ready time is less than 1%, but the 'CPU cost' metric is high, and the 'Memory' section shows high values for 'Remote' memory accesses. What is the most likely cause of the performance drop?

Question 109easymulti select
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A vSphere administrator is scaling a cluster by adding new ESXi hosts and VMs. Which two actions help ensure that performance continues to meet requirements as the environment grows? (Choose two.)

Question 110mediummultiple choice
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Refer to the exhibit. An administrator runs esxtop and sees the above output for a virtual machine. What is the most likely cause of the performance issue?

Exhibit

Refer to the exhibit.
```
GID   NAME      NWLD   %USED   %RUN   %SYS   %WAIT   %RDY   %CSTP   %MLMTD
12345 VM_01       4     20.0    15.0    5.0   25.0    45.2   30.1     0.0
```
Question 111hardmultiple choice
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A company operates a large vSphere environment with 32 ESXi hosts, each featuring 2 sockets, 12 cores per socket (2.6 GHz), and 256 GB RAM. The environment runs a mix of VMs, including several critical database VMs with 16 vCPUs and 128 GB RAM configured. After migrating these database VMs from an older cluster to a new cluster with identical hardware specifications, administrators observe significant performance degradation. vCenter performance charts show high memory ballooning and elevated CPU ready time for these VMs, while overall host utilization remains moderate (CPU 40%, RAM 60%). The new cluster's hosts have two NUMA nodes per socket (each NUMA node spans 6 cores and 64 GB RAM). The older cluster had hosts with a single NUMA node per socket. The administrator confirms that the VMs are running on hosts with sufficient free resources and that no other VMs are contending heavily. What is the most likely cause, and what should the administrator do to resolve the issue?

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