VMware 1V0-21.20 Exam Dumps & Practice Test Questions
Question 1:
What is the main purpose of an alarm in vCenter Server?
A. To monitor and record system actions and their frequency.
B. To notify users about events or conditions associated with an object in vCenter Server.
C. To signal ongoing tasks, such as the migration of a virtual machine.
D. To log user or system activities occurring on objects in vCenter Server or a host.
Answer: B
Explanation:
In vCenter Server, an alarm is primarily used to monitor and notify users about specific events or conditions associated with objects within the vCenter environment. Alarms in vCenter Server are triggered by certain conditions, such as hardware failures, resource thresholds being exceeded, or virtual machine performance issues. When an event meets the criteria specified in an alarm's configuration, vCenter sends notifications to alert the administrator or user of the event, often through email or within the vSphere client interface.
Alarms are configured to monitor various types of events, such as CPU usage, memory utilization, network traffic, or disk space on hosts or virtual machines. They can also be set to trigger when objects enter certain states, like when a virtual machine is powered off, or when hardware issues arise on a host. These alerts help administrators proactively respond to issues and ensure the stability of the virtual environment.
Option A describes monitoring and recording system actions, which is a function of system logging, not alarms. Option C is related to ongoing tasks, such as migrations, but alarms are not used for signaling tasks like this. Finally, D refers to logging activities, which is not the main purpose of alarms in vCenter, as alarms are more concerned with notifying about events or conditions, not logging them.
Thus, the correct answer is B, as it accurately describes the main function of an alarm in vCenter Server, which is to notify users about specific events or conditions.
Question 2:
If an administrator wants to update the operating system of a virtual machine and also wants the ability to roll back to the previous state in case of issues, which action should be performed in the vSphere Client?
A. Right-click the VM > Clone > Clone to Template.
B. Right-click the VM > Clone > Clone to Virtual Machine.
C. Right-click the VM > Migrate.
D. Right-click the VM > Snapshots > Take Snapshot.
Answer: D
Explanation:
In the vSphere environment, when an administrator wants to make changes to a virtual machine (VM) — such as updating the operating system — and also wants to have the ability to easily revert back to the previous state in case of issues, the best approach is to use snapshots.
A snapshot in vSphere captures the state, data, and configuration of a VM at a specific point in time. When the snapshot is taken, it preserves the VM’s disk, memory, and settings. This allows the administrator to later restore the VM to this exact state, which is especially useful if the operating system update introduces issues or if further configuration changes cause instability. Snapshots are typically used for backup before making changes that could potentially disrupt the system, such as OS upgrades, application installations, or system reconfigurations.
Option A (Cloning to a Template) would create a reusable template of the VM, which is useful for creating multiple copies of a virtual machine but does not provide the same level of flexibility for rolling back changes. Option B (Cloning to a Virtual Machine) also creates a copy of the VM, but like templates, cloning does not allow for easy rollbacks to a previous state on the original VM. C (Migrate) refers to moving a VM to another host or datastore, which does not address the need for updating the OS and then rolling it back if necessary.
Thus, the correct answer is D, as using snapshots allows the administrator to preserve the current state of the VM before making changes, enabling a quick rollback if the update introduces problems.
Question 3
If a virtual machine called vm01 is no longer visible in the vSphere inventory but its configuration files are still available on the datastore, which file should be selected to re-register the virtual machine?
A. vm01.nvram
B. vm01.vmx
C. vm01.vmsd
D. vm01.vmdk
Answer: B
Explanation:
When a virtual machine (VM) is no longer visible in the vSphere inventory but its configuration files are still present on the datastore, it means that the VM's configuration file has become disconnected from the vSphere inventory. To re-register the VM and bring it back into the inventory, the correct configuration file to select is the vmx file. Here’s why:
vm01.vmx: The .vmx file is the primary configuration file for a VMware virtual machine. It contains important settings such as virtual hardware configurations, network settings, and other configurations for the VM. By selecting the .vmx file, you are essentially telling vSphere to re-register the VM and bring it back into the inventory.
vm01.nvram: The .nvram file stores the virtual machine's BIOS settings. This file is critical for maintaining the VM's configuration in terms of boot options but is not used for registering the VM back into the inventory.
vm01.vmsd: The .vmsd file contains information about the snapshot configuration of the VM. This file does not serve the purpose of re-registering the virtual machine. It is only relevant when dealing with snapshots or virtual machine state data.
vm01.vmdk: The .vmdk file is the virtual disk file of the virtual machine. It contains the virtual machine's disk data but is not involved in the VM registration process.
To bring the VM back into the vSphere inventory, you must select the .vmx file, as it contains the necessary configuration settings for the virtual machine.
Question 4
Which two features describe the behavior and capabilities of vSphere High Availability (HA)? (Select two options.)
A. If vCenter Server is down, vSphere HA automatically restarts virtual machines on healthy hosts.
B. vSphere HA restarts virtual machines when their host becomes isolated from the management network.
C. vSphere HA detects datastore failures and restarts virtual machines on hosts that still have datastore access.
D. vSphere HA balances workloads across hosts to prevent resource contention.
E. vSphere HA uses secondary virtual machines to ensure no data loss during failures.
Answer: B, C
Explanation:
vSphere High Availability (HA) is a feature that ensures virtual machine availability in the event of hardware failures or other issues that may cause VM downtime. The correct answers involve two key features of vSphere HA:
vSphere HA restarts virtual machines when their host becomes isolated from the management network (B): One of the key functions of vSphere HA is to detect when a host becomes isolated from the management network or is unable to communicate with other hosts in the cluster. When this occurs, vSphere HA can automatically restart the affected virtual machines on other available hosts to ensure minimal downtime and service continuity.
vSphere HA detects datastore failures and restarts virtual machines on hosts that still have datastore access (C): vSphere HA can also monitor datastore access. If a host experiences a datastore failure (e.g., if a datastore becomes unavailable), vSphere HA will attempt to restart virtual machines on another host that still has access to the datastore, ensuring that the virtual machines are able to continue running without manual intervention.
Now, let's address the other options:
If vCenter Server is down, vSphere HA automatically restarts virtual machines on healthy hosts (A): This statement is incorrect because vSphere HA does not require vCenter Server to be available in order to restart VMs. Once HA is configured, it operates independently of vCenter, although vCenter is necessary for initial configuration and management of the cluster.
vSphere HA balances workloads across hosts to prevent resource contention (D): This statement is incorrect because vSphere HA is primarily designed for high availability rather than workload balancing. Workload balancing and resource contention management are typically handled by vSphere Distributed Resource Scheduler (DRS), not HA.
vSphere HA uses secondary virtual machines to ensure no data loss during failures (E): This statement is incorrect because vSphere HA does not rely on secondary virtual machines to prevent data loss. It works by restarting virtual machines on other available hosts when a failure occurs. Data loss prevention during failures is typically managed by mechanisms like VMware vSphere Fault Tolerance (FT) or replication tools.
Thus, the correct answers are B and C, which highlight the network isolation and datastore failure handling capabilities of vSphere HA.
Question 5:
To capture a consistent state of a virtual machine’s guest file system before performing an upgrade while keeping the VM powered on, which action should an operator take?
A. Right-click the VM > Migrate > Change Compute Resource > Select Host > Finish.
B. Right-click the VM > Power > Power Off > Actions > Compatibility > Upgrade VM Compatibility > OK.
C. Power off the VM > Right-click the VM > Snapshots > Take Snapshot > OK.
D. Right-click the VM > Snapshots > Take Snapshot > Choose the option to quiesce the guest file system > OK.
Answer: D
Explanation:
In a virtualized environment, it’s essential to capture a consistent state of a virtual machine (VM), especially when performing system upgrades or making changes that could affect its stability. Taking a snapshot of a VM before making changes is a common practice, but in this case, ensuring that the snapshot captures a consistent state of the guest file system is key.
When an operator takes a snapshot of a VM while it is powered on, they can choose to quiesce the guest file system. Quiescing refers to pausing disk activity within the guest OS to ensure that the file system is in a consistent state before the snapshot is taken. This is particularly important when the guest operating system has applications or processes that may be actively writing to disk, as it prevents the snapshot from capturing an inconsistent state. The quiesce option ensures that all I/O operations are paused, the file system is flushed, and any pending changes are committed before the snapshot is created.
Option D is the correct answer because it specifically mentions quiescing the guest file system during the snapshot process, which is the best method for capturing a consistent state while keeping the VM powered on.
Option A involves migrating the VM to a different host, but this does not capture the VM's file system state. Option B requires powering off the VM and upgrading its compatibility, which is unrelated to snapshotting or ensuring a consistent file system state before an upgrade. Option C also requires powering off the VM, which defeats the purpose of keeping the VM powered on during the upgrade process.
Thus, the correct action to capture a consistent state of the VM’s file system while keeping it powered on is D, which allows for a snapshot with file system quiescing.
Question 6:
Which vSphere feature ensures continuous availability for mission-critical virtual machines, providing no data loss or service interruption even if a host fails?
A. vSphere Fault Tolerance
B. vSphere vMotion
C. vSphere Replication
D. vSphere High Availability (HA)
Answer: A
Explanation:
vSphere Fault Tolerance (FT) is a vSphere feature designed to ensure continuous availability and eliminate service interruption for mission-critical virtual machines (VMs) by providing zero downtime and no data loss even in the event of a host failure. Fault tolerance works by creating a live shadow of the VM running on another host. The two VMs — the primary VM and the secondary VM — are synchronized at the CPU level, ensuring that the secondary VM is always up-to-date with the primary one. If the host running the primary VM fails, the secondary VM immediately takes over, ensuring that the service remains uninterrupted.
This is particularly important for environments where service availability is critical, and even brief interruptions or data loss cannot be tolerated.
Option A: vSphere Fault Tolerance is the correct answer because it ensures continuous availability with no service interruption and zero data loss, which is exactly what is needed when a host fails.
Option B: vSphere vMotion is a feature that allows the live migration of a VM from one host to another without downtime, but it does not provide continuous availability during host failures. vMotion helps with load balancing and maintenance but does not guarantee zero downtime in case of hardware failure.
Option C: vSphere Replication is used to replicate VM data to another site or datastore for disaster recovery purposes, but it does not provide the immediate failover and continuous availability that vSphere Fault Tolerance offers.
Option D: vSphere High Availability (HA) provides automated VM restart in case of host failure but does not guarantee zero data loss or no service interruption. HA can bring a VM back online on another host, but there may be some delay during the failover process.
Therefore, the correct feature for ensuring no data loss or service interruption during a host failure is A, vSphere Fault Tolerance.
Question 7
Which two guest operating systems are officially supported by VMware for deployment in a vSphere environment? (Select two options.)
A. T/TOS (Tandem Transactional Operating System)
B. Android
C. macOS
D. Microsoft Windows
E. iOS
Answer: D, C
Explanation:
VMware vSphere supports a variety of guest operating systems for deployment within a virtualized environment. The correct choices for officially supported guest operating systems are:
Microsoft Windows (D): VMware vSphere supports various versions of Microsoft Windows, including Windows Server editions and Windows client editions. It is one of the most commonly used guest operating systems in virtual environments and is fully compatible with the vSphere platform, including features like vSphere HA, vMotion, and DRS.
macOS (C): macOS is officially supported in VMware vSphere environments for use on Apple hardware (through Apple's Mac hardware). However, Apple’s End User License Agreement (EULA) restricts the use of macOS in virtual environments to Apple hardware. This means macOS guests can only run on Apple-branded servers.
Now, let’s address the incorrect options:
T/TOS (Tandem Transactional Operating System) (A): VMware does not officially support T/TOS, as it is not a commonly used operating system within virtualized environments. T/TOS was a proprietary OS primarily used in mission-critical systems, but it is not recognized as a supported guest OS in vSphere.
Android (B): Android is not officially supported for deployment as a guest OS within a vSphere environment. VMware focuses on supporting traditional enterprise and server operating systems like Windows and Linux, and Android is designed for mobile devices, not for virtual machines in data centers.
iOS (E): iOS is also not officially supported for use as a guest operating system in VMware environments. Like Android, iOS is a mobile operating system and not suitable for virtualization in enterprise data centers.
The correct answers are D and C, as these operating systems are officially supported by VMware for use in a vSphere virtualized environment.
Question 8
Which virtual machine issue can be resolved using vSphere Storage vMotion?
A. The vSphere Client indicates that the VM requires consolidation.
B. Multiple VMs on an ESXi host are experiencing high CPU contention.
C. The storage array hosting a VM must be placed into maintenance mode.
D. The ESXi host running a VM needs to be placed in maintenance mode.
Answer: C
Explanation:
vSphere Storage vMotion is a VMware feature that enables the migration of virtual machine disk files (VMDKs) between different datastores without downtime. This can be useful in several scenarios, including moving VMs from one datastore to another while ensuring minimal disruption to the VM itself. The correct answer is:
The storage array hosting a VM must be placed into maintenance mode (C): vSphere Storage vMotion is specifically designed to move VM storage from one datastore to another while the virtual machine is still running. If a storage array hosting a VM is being placed into maintenance mode (perhaps for upgrades or hardware maintenance), Storage vMotion allows the virtual machine's data to be migrated off that storage array to another datastore without any downtime.
Now, let’s address the other options:
The vSphere Client indicates that the VM requires consolidation (A): This issue is related to virtual machine snapshots and the need to consolidate them. It cannot be resolved by Storage vMotion; instead, consolidation requires the use of the VM snapshot consolidation feature in vSphere to manage snapshots and merge them into a single disk state.
Multiple VMs on an ESXi host are experiencing high CPU contention (B): High CPU contention on an ESXi host can be addressed through VMware DRS (Distributed Resource Scheduler) or by migrating VMs to a less-constrained host using vMotion, but this issue is not related to Storage vMotion, which deals with storage, not CPU resources.
The ESXi host running a VM needs to be placed in maintenance mode (D): While Storage vMotion can move storage between datastores, if the ESXi host needs to be placed in maintenance mode, vMotion would be the appropriate tool to migrate the VM to another host. Storage vMotion does not handle the migration of running VMs between hosts but focuses on storage migration.
Thus, the correct answer is C, as vSphere Storage vMotion can help in scenarios where the storage array hosting a VM must be placed into maintenance mode, by migrating the VM’s storage to another datastore.
Question 9:
To deploy and run virtual machines on a system running Windows 10, which action must be taken?
A. Add an additional CD-ROM
B. Install Windows patches
C. Install a Type-2 hypervisor
D. Add an additional network interface
Answer: C
Explanation:
In order to deploy and run virtual machines (VMs) on a system running Windows 10, the essential requirement is the installation of a Type-2 hypervisor. A Type-2 hypervisor, also known as a hosted hypervisor, runs as an application on top of an existing operating system (in this case, Windows 10). It allows the system to create and manage multiple virtual machines within the host OS.
Common examples of Type-2 hypervisors for Windows 10 include VMware Workstation, Oracle VirtualBox, and Microsoft Hyper-V (in its client form, although Hyper-V is more commonly used as a Type-1 hypervisor on Windows Server).
Option A (Add an additional CD-ROM) is not relevant to running VMs; adding hardware components like CD-ROM drives does not inherently enable virtual machine functionality.
Option B (Install Windows patches) is good practice for keeping your system updated, but it is not directly related to the ability to deploy and run VMs. Patches are important for security and stability but do not enable virtualization capabilities.
Option D (Add an additional network interface) is also unnecessary for the basic functionality of running virtual machines, although it may be needed if you require specific network configurations for VMs.
Therefore, the action required to run virtual machines on a Windows 10 system is to install a Type-2 hypervisor (C).
Question 10:
Which vSphere feature allows the migration of virtual machines from one host to another without downtime for the VM?
A. vSphere Storage vMotion
B. vSphere Fault Tolerance
C. vSphere vMotion
D. vSphere High Availability (HA)
Answer: C
Explanation:
The vSphere feature that allows the migration of virtual machines (VMs) from one host to another without downtime is vSphere vMotion. vMotion enables the live migration of VMs from one physical host to another within the same vSphere cluster while the VM continues to run without interruption. This allows administrators to perform maintenance tasks, balance loads, or resolve hardware failures without affecting the VM's availability or the services it provides.
The migration process is seamless, with the VM's memory, CPU state, and disk files being transferred to the destination host in real-time. This is extremely useful for data center operations that require continuous uptime and minimal service disruptions.
Option A (vSphere Storage vMotion) allows the migration of a VM’s virtual disk files from one storage location to another without downtime, but it does not handle the migration of VMs between hosts. It focuses on storage, not host-to-host VM migration.
Option B (vSphere Fault Tolerance) provides zero downtime by running a secondary copy of the VM on another host, ensuring continuous availability if the primary host fails. However, it is not used for migrating VMs between hosts while they are running.
Option D (vSphere High Availability (HA)) provides automatic VM restarts on another host if the current host fails, but it does not perform live migration of VMs without downtime. It is designed to handle failures, not proactive migration.
Therefore, the correct answer is C, vSphere vMotion, as it enables the live migration of virtual machines between hosts with no downtime.
