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10+ Alkem Laboratories Interview Questions and Answers

Updated 29 Nov 2024
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Q1. What are protocol used for Storage?

Ans.

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)

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Q2. different between VSS and Distributed Switch?

Ans.

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

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Q3. Cluster is Down ? How to fix

Ans.

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

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Q4. PSOD Issues ? How to fix?

Ans.

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

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Q5. what is Memory ballooning?

Ans.

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

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Q6. what is TPM and explain?

Ans.

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

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Q7. what is admission control ?

Ans.

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

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Q8. Explain Thin and Thick provisioning?

Ans.

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

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Q9. Different between Template and Clone?

Ans.

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

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Q10. virtual machine is orphaned Status?

Ans.

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.

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Q11. What is Vm kernel?

Ans.

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

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Q12. Virtual machine inaccessible?

Ans.

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

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Q13. Vm Migration issue?

Ans.

Vm migration issue can occur due to compatibility issues, network problems, or insufficient resources.

  • Check for compatibility issues between source and target environments

  • Ensure network connectivity and bandwidth are sufficient for migration

  • Verify that there are enough resources (CPU, memory, storage) available for the migration

  • Consider using migration tools like VMware vMotion or Storage vMotion

  • Troubleshoot any errors or warnings during the migration process

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