VMware 2V0-15.25 Practice Exam Questions & Answers

In vSAN ESA or OSA networking configured through a dedicated vSphere Distributed Switch (vDS), each vSAN vmkernel port must have at least one Active physical uplink available at all times. The scenario describes a vDS with two physical adapters and two uplinks, but after failure of the active uplink, vSAN traffic was lost. This only occurs when the second physical NIC is not actually assigned to the vSAN port group---typically because its uplink is set to ''Unused''.

In such a misconfiguration:

vSAN traffic only uses the single active uplink.

When that uplink fails, vSAN has no failover path, causing immediate connectivity loss.

Option A (storage policies) does not affect network uplink behavior. Option B (VLAN tagging) could cause connectivity failure but would not suddenly break only after an uplink failure. Option D (failover policy not allowing fallback) affects recovery order, not immediate redundancy.

The symptoms described---reduced cluster capacity, degraded virtual machine components, and automatic component rebuild operations---are classic indicators of a vSAN disk failure or disk group degradation. vSAN continuously monitors the health of disks, disk groups, and network paths. When a physical disk or disk group becomes unavailable, vSAN will:

Mark affected components as degraded because the required number of replicas or witnesses cannot be maintained.

Trigger automatic repair/rebuild operations, provided there are enough healthy disks remaining in the cluster to satisfy the storage policy (e.g., FTT=1, RAID1/5/6).

Reduce available storage capacity because the failed device is removed from contributing to the vSAN datastore.

These behaviors align directly with documented vSAN failure-response logic, which states that component rebuilds begin automatically after a disk failure, assuming the cluster still has adequate resources.

The other options do not match the symptoms:

A . VM migration to another cluster does not reduce vSAN capacity nor trigger component rebuilds.

B . vSAN license capacity too small restricts features, not component state or capacity changes.

C . Too many VMs created may cause capacity pressure but does not mark components degraded or trigger automated rebuilds.

Only physical disk failure accurately explains all three observations simultaneously.

In VCF 9.0, when deploying VCF Automation using the VCF Installer in a Simple Deployment Model, the appliance requires two IP addresses:

Primary IP -- Management interface

Secondary IP -- Required for service separation and internal routing for Automation services

VMware's JSON schema for VCF Installer enforces this requirement. If the second IP is missing, incorrectly formatted, or placed under the wrong JSON section, the installer validation will fail immediately with a JSON schema error before deployment begins.

This is one of the most common causes of validation failure for VCF Automation deployment.

Option A (component binaries missing) produces a bundle download error, not JSON schema failure. Option C (NSX Manager size = large) is allowed and does not break JSON validation. Option D (separate vDS for vSAN) is allowed if defined correctly and also does not cause JSON schema failure.

In vSphere 7+ and VCF-managed clusters, the vSphere Cluster Services (vCLS) VMs must remain powered on for DRS, cluster health, and policy enforcement to function. If the vCLS VMs cannot power on, no workloads---including new VMs---can be deployed to the cluster because vSphere considers the cluster unhealthy.

A common cause is insufficient resources (CPU/memory), datastore issues, or policy conflicts preventing vCLS VMs from starting. VMware provides Retreat Mode as a troubleshooting mechanism to temporarily disable vCLS, allowing the administrator to deploy VMs and correct underlying issues. Enabling retreat mode:

Removes vCLS from the cluster

Restores ability to deploy VMs

Allows remediation of storage/placement issues

Can later be disabled to restore DRS health

Option A (deleting resource pools) does not restore vCLS VM power state. Option B (disabling HA) does not affect vCLS behavior. Option D (setting DRS automation level) does not correct vCLS placement problems.

VCF Operations enforces strict certificate format validation when importing certificate chains. According to VMware Cloud Foundation 9.x certificate management requirements, all uploaded certificates must be PEM-encoded. A PEM certificate must contain:

ASCII-encoded content

Proper headers such as:

-----BEGIN CERTIFICATE-----

-----END CERTIFICATE-----

If the certificate is encoded in DER, PFX, PKCS#12, or any non-PEM format, VCF Operations will reject the upload with the error:

''The provided certificate content is invalid.''

This matches the behavior described in the question.

Option B (chain order invalid) and Option C (missing root CA) can cause validation issues only after the certificate file is successfully parsed. The error described indicates the file itself cannot be parsed, which directly points to encoding.

Option D (missing private key) is incorrect because certificate chain uploads must NOT include a private key --- private keys are only used during CSR signing and are handled separately by the system.