Top 50 Virtualization Interview Questions and Answers

Virtualization creates multiple virtual machines on a single physical machine, while container orchestration manages multiple containers on a single operating system instance.

• Virtualization creates a layer of abstraction between the hardware and the ...read more

VMware's virtualization on a multicore machine allows for efficient utilization of resources and improved performance.

• VMware's virtualization technology enables the creation of multiple virtual machines (VMs) on a single multicore machine.

• Each VM can...read more

Virtualization is the creation of a virtual version of something, such as an operating system, server, storage device, or network resource.

• Virtualization allows multiple operating systems or applications to run on a single physical machine, increasin...read more

VDI stands for Virtual Desktop Infrastructure, which allows users to access a virtual desktop from any device.

• VDI is a technology that separates the desktop environment and associated application software from the physical client device that is used ...read more

HA stands for High Availability in VM, which ensures that the virtual machine is always available and accessible.

• HA is achieved by creating a cluster of virtual machines that work together to provide redundancy and failover capabilities.

• If one virtua...read more

Namespace in Docker is a way to isolate resources and avoid naming conflicts.

• Namespaces provide a layer of isolation for containers

• Each namespace has its own set of resources

• Namespaces can be used for network, process, and mount isolation

• Example: doc...read more

CPU ebruvation refers to the process of CPU overheating and subsequent shutdown to prevent damage.

• CPU ebruvation occurs when the CPU temperature exceeds its safe operating limit.

• It is a protective mechanism to prevent damage to the CPU.

• During ebruvat...read more

Vmotion is a feature in VMware that allows live migration of virtual machines between hosts without any downtime.

• Vmotion enables workload mobility and resource optimization

• It requires shared storage between the hosts

• During migration, the memory, CPU,...read more

Instant clone is a feature in VMware Horizon that allows for rapid creation of virtual desktops.

• Instant clones are created from a parent VM in a matter of seconds.

• They share the same virtual disks as the parent VM, but have their own memory and virtu...read more

VMware ESXi is a type-1 hypervisor that allows multiple virtual machines to run on a single physical host.

• ESXi is a bare-metal hypervisor, meaning it runs directly on the host's hardware without the need for an underlying operating system.

• It provides...read more

Citrix Machine Creation Services (MCS) is a technology that allows for the rapid provisioning of virtual machines in a Citrix environment.

• MCS creates virtual machines based on a master image, allowing for easy scalability and management.

• It uses a clo...read more

Deploying systems management software on ESX Server can lead to performance issues and potential conflicts.

• Performance Overhead: Running management software can consume CPU and memory resources, impacting VM performance.

• Compatibility Issues: Some man...read more

VMP stands for Vendor Master Plan. It is a strategic document that outlines the approach and activities for managing vendors in an organization.

• VMP is a comprehensive plan that includes vendor selection, evaluation, and performance management.

• It defi...read more

Containers are isolated environments for running applications, while virtualization involves creating virtual versions of hardware resources.

• Containers share the host OS kernel, while virtualization creates separate OS instances.

• Containers are lightw...read more

Generate a report of ESX hosts, VMs, RAM, and CPU usage in a vSphere environment using PowerCLI or vSphere Client.

• Use PowerCLI to connect to vCenter: Connect-VIServer -Server 'vCenterServerName'.

• Retrieve ESX hosts: Get-VMHost | Select Name, @{Name='C...read more

DRS stands for Distributed Resource Scheduler, a feature in VMware that automatically balances resources across a cluster of hosts.

• DRS monitors resource usage on hosts in a cluster

• It automatically migrates virtual machines to balance resource usage

• He...read more

A Citrix machine catalog is a collection of virtual machines that share the same base image and configuration.

• A machine catalog is used in Citrix Virtual Apps and Desktops to manage and deliver virtual desktops and applications to end users.

• It allows...read more

Lockdown technology in VMware restricts access to the ESXi host directly, allowing only authorized users to perform specific actions.

• Lockdown mode can be enabled to prevent direct access to the ESXi host

• Only users with specific permissions can perfor...read more

Certified backup tools for ESX ensure reliable data protection and recovery for virtual environments.

• VMware vSphere Data Protection (VDP) - integrated backup solution for vSphere environments.

• Veeam Backup & Replication - popular third-party tool for ...read more

Virtualization is the creation of a virtual version of something, while hypervisor is a software that creates and manages virtual machines.

• Virtualization is the process of creating a virtual version of something, such as an operating system, a server...read more

vmdk and vhd are virtual hard disk file formats used by virtualization software.

• vmdk is a file format used by VMware virtualization software.

• vhd is a file format used by Microsoft virtualization software.

• Both formats are used to store virtual hard di...read more

Para virtualization is a virtualization technique where the guest operating system is aware that it is running on a virtual machine.

• Guest OS is modified to be aware of the virtualized environment

• Improves performance by reducing overhead

• Examples inclu...read more

ESXi upgrade involves updating the hypervisor software to a newer version for improved performance and security.

• Ensure compatibility with hardware and software

• Backup important data before upgrading

• Check for any known issues or bugs with the new versi...read more

Docker is a containerization platform for running applications in isolated environments, while Docker Swarm is a tool for orchestrating multiple Docker containers across multiple hosts.

• Docker is used for creating and managing containers, while Docker...read more

Containers in virtual machines are lightweight, portable, and isolated environments that allow applications to run independently.

• Containers are a form of virtualization that package an application and its dependencies together.

• They share the host OS ...read more

VMware Workstation is a desktop virtualization software that allows users to run multiple operating systems on a single physical machine.

• Allows users to create and run virtual machines on their desktop or laptop

• Supports a wide range of operating syst...read more

VM classification refers to the categorization of virtual machines based on their characteristics and capabilities.

• VM classification can be based on the type of hypervisor used, such as Type 1 or Type 2.

• VMs can also be classified based on their purpo...read more