VMware Associate VMware Data Center Virtualization - 1V0-21.20 Exam Questions [2026]

QUESTION NO: 1
A vSphere operator finds this error message:
Device or filesystem with identifier [naa.6000eb31dffdc33a000000000000002a] has entered the All Paths Down state.
What should the operator conclude from this error message?

A. A host Is Inaccessible, and migration of affected VMs is expected. B. A host failed, and automated recovery of affected VMs Is expected. C. A storage device has failed and is not expected to become available. D. A storage device is inaccessible and is expected to become available.

Correct Answer: D

QUESTION NO: 2
What is a benefit of VMware vSphere Storage APIs - Data Protection?

A. It facilitates decentralized, on-host, LAN-free backup of vSphere virtual machines. B. It increases ESX host resources to do backup processing. C. It enables centralized, off-host. LAN-free backup of vSphere virtual machines. D. It allows backup of a virtual machine with a backup agent in the guest OS.

Correct Answer: C

QUESTION NO: 3
Which feature allows an administrator to implement master copies of virtual machines to create ready-for-use virtual machines?

A. Templates B. Custom Attributes C. Resource Pools D. Snapshots

Correct Answer: A

QUESTION NO: 4
Which selection is optional when deploying a new virtual machine in
the vSphere Client?

A. Compute resource B. Guest OS C. Folder D. Data center

Correct Answer: D

QUESTION NO: 5
What is the purpose of an alarm?

A. It records user actions or system actions that occur on objects in
vCenter Server or on a host. B. It notifies about events or conditions that occur with an object on
vCenter Server. C. It represents system activities that do not complete immediately, such as migrating a virtual machine. D. It keeps records of system actions and the frequency at which they occur.

Correct Answer: B

QUESTION NO: 6
Which two storage protocols can a virtual infrastructure operator use to create a VMFS datastore? (Choose two.)

A. CIFS B. SMB C. Fibre Channel D. iSCSI E. NFS

Correct Answer: C,D

QUESTION NO: 7
Which two improvements to the management of a VM are gained when VMware Tools are used? (Choose two.)

A. Synchronizes time between the guest and the host B. Adds VM alarms to the inventory C. Makes a graceful shutdown of the VM possible D. Allows a snapshot before the guest OS is upgraded E. Performs a clone of the VM

Correct Answer: A,C

QUESTION NO: 8
Which vSphere feature provides continuous availability, allowing
users to protect any virtual machine from a host failure with no loss of data or connectivity?

A. vSphere HA B. Enhanced vMotion Compatibility C. vSphere Fault Tolerance D. vSphere vMotion

Correct Answer: C