10+ Alkem Laboratories Interview Questions and Answers

Protocols used for Storage include iSCSI, Fibre Channel, NFS, and SMB.

• iSCSI (Internet Small Computer System Interface)

• Fibre Channel

• NFS (Network File System)

• SMB (Server Message Block)

VSS is a virtual switch that operates at the host level, while Distributed Switch is a single switch that spans multiple hosts.

• VSS is specific to each host, while Distributed Switch is shared across multiple hosts.

• VSS is managed at the host level, while Distributed Switch is managed centrally.

• Distributed Switch allows for centralized network configuration and monitoring.

• VSS is limited to the host's physical NICs, while Distributed Switch can utilize multiple physical NICs acr...read more

Check for underlying issues, restart services, verify network connectivity, review logs, escalate if necessary.

• Check for any underlying issues that may have caused the cluster to go down

• Restart the necessary services related to the cluster

• Verify network connectivity between the cluster nodes

• Review logs for any error messages or warnings

• Escalate the issue to higher level support if necessary

PSOD stands for Purple Screen of Death. It is a critical error in VMware that requires troubleshooting to fix.

• Check for hardware issues such as faulty memory or CPU

• Review system logs for any error messages leading up to the PSOD

• Update VMware ESXi to the latest version

• Check for compatibility issues with hardware or software

• Contact VMware support for further assistance

Memory ballooning is a memory reclamation technique used in virtualization to reclaim memory from virtual machines.

• Memory ballooning is a technique used by hypervisors to reclaim memory from virtual machines by inflating or 'ballooning' a balloon driver inside the guest OS.

• The hypervisor can then allocate this reclaimed memory to other virtual machines that need it more.

• Memory ballooning is typically used when the host is under memory pressure and needs to reclaim memory from...read more

TPM stands for Trusted Platform Module, a hardware-based security feature that stores cryptographic keys and provides secure boot capabilities.

• TPM is a microchip that is typically installed on the motherboard of a computer or server.

• It provides hardware-based security functions such as secure boot, key storage, and encryption.

• TPM helps ensure the integrity of the system by verifying that it has not been tampered with.

• It is commonly used in conjunction with encryption software...read more

Admission control is a feature in Vmware that ensures resources are available for virtual machines during failover or migration.

• Admission control prevents virtual machines from being powered on if it would violate resource constraints

• It helps maintain high availability by ensuring that there are enough resources available for failover

• Admission control policies include slot policy, dedicated failover hosts, and resource pools

Thin provisioning allocates storage space on demand, while thick provisioning allocates all space upfront.

• Thin provisioning only uses space as data is written, maximizing storage efficiency.

• Thick provisioning allocates all space upfront, ensuring immediate availability but potentially wasting space.

• Thin provisioning is more flexible and allows for overcommitting storage resources.

• Thick provisioning is more suitable for performance-sensitive applications.

• Example: Thin provisio...read more

Template is a master copy used to create multiple identical VMs, while Clone is a copy of an existing VM.

• Template is a blueprint for creating VMs, while Clone is a duplicate of an existing VM.

• Templates are used for deploying multiple VMs with the same configuration, while Clones are used for creating copies of specific VMs.

• Templates are typically read-only, while Clones can be modified independently.

• Clones retain the same configuration and settings as the original VM, while T...read more

Orphaned status means the virtual machine is no longer associated with its parent resource pool or host.

• Orphaned virtual machines can occur when a host fails or when a VM is manually removed from a resource pool.

• Orphaned VMs can still consume resources and may need to be manually removed from the inventory.

• To resolve orphaned status, the VM can be re-registered with a host or resource pool.

The Vm kernel is a Unix-like operating system that runs on the physical hardware and manages the virtual machines on a VMware host.

• It is a thin layer of software that runs directly on the host hardware to enable multiple operating systems to run on a single physical server.

• It is responsible for managing the physical resources of the host machine and providing a platform for virtual machines to run.

• The Vm kernel is highly optimized for virtualization and provides features like...read more

Virtual machine may be inaccessible due to various reasons such as network issues, configuration errors, or resource constraints.

• Check network connectivity to the virtual machine

• Verify that the virtual machine is powered on

• Ensure that the virtual machine's configuration is correct

• Check for resource constraints such as CPU or memory usage

• Review logs for any error messages or warnings