NTT Data Vmware Administrator Interview Questions and Answers

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

• sv motion is a feature in VMware that allows live migration of virtual machines from one host to another without any downtime.

• v-motion is a feature in VMware that allows live migration of virtual machines from one host to another with minimal downtime.

• HA (High Availability) is a feature in VMware that ensures ...read more

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

• Virtualisation allows multiple operating systems to run on a single physical machine

• It enables better utilization of hardware resources

• It provides flexibility and scalability to IT infrastructure

• Examples include VMware, Hyper-V, and VirtualBox

Virtualization is the process of creating a virtual version of a device or resource, such as a server, storage device, network or operating system.

• Virtualization allows multiple virtual machines to run on a single physical machine, maximizing resources and increasing efficiency.

• Thin provisioning allocates storage space on an as-needed basis, while thick provisioning allocates all required space upfront.

• Snapshots captur...read more

ESXi OS upgrade and rollback procedures involve careful planning and execution to ensure system stability.

• Before upgrading, ensure compatibility with hardware and software requirements

• Take backups of important data and configurations

• Use VMware Update Manager or command line interface for upgrade process

• Monitor upgrade progress and resolve any issues that may arise

• For rollback, restore from backups taken before upgrade ...read more

Thick provisioned eager and lazy zero are types of disk provisioning in VMware.

• Thick provisioned eager zeroed: allocates all the space for a virtual disk at the time of creation and zeros out the disk blocks immediately.

• Thick provisioned lazy zeroed: allocates all the space for a virtual disk at the time of creation but does not zero out the disk blocks until data is written to them.

Snapshot background process involves creating a point-in-time copy of a virtual machine's disk file.

• Snapshots are created to capture the current state of a virtual machine's disk file

• When a snapshot is initiated through vCenter or ESXi host, a background process is triggered to create the snapshot

• The background process involves freezing the virtual machine's disk file, creating a delta disk to store changes, and redire...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 perform actions on the host

• Helps enhance security by limiting access to the host

• Can be configured through the vSphere Client or vSphere Web Client