Interview Questions.

Q1. What Are The Devices That Can Be Added While The Virtual Machine Running?

In VI 3.Five we will add Hard Disk and NIC's even as the device walking.

In vSphere 4.Zero we will add Memory and Processor along with HDD and NIC's while the gadget walking.

Q2. What Are The Types Of Data Stores Supported In Esx three.Five?

ISCSI datastores, FC SAO datastores, Local VMFS, NAS and NFS.

Q3. Have You Ever Faced Esx Server Crashing And Virtual Centre Server Crash? How Do You Know The Cause Of These Crashes In These Cases?

Happened whilst SAN went down. Raid controller became awful. Had to repair VM. Also whilst a thin provisioned server used almost all the vmfs volume. Had to transport a few vintage powered off VM from VMFS Volume.

Q4. Your Host Is A Beast, Dual Socket With eight Core Cpus And 192 Gb Of Memory. How Many Virtual Servers Can Be Added To A 1tb Datastore?

It depends on the size of the VMs and the performance of the storage. Higher performing garage can be crammed to capacity but area have to be left for statistics growth and snapshots. A datastore have to in no way be allowed to top off a hundred%.

Q5. Explain Your Work Related To Below Terms?

VM Provisioning: Virtual Machine Creation.

Alarms & Event Management:

Alarms are used to know the repute of the aid utilization for a VM.

Events are used reveal the duties which are taken area on the esx servers or in the virtual center.

Task Scheduler: Task scheduler, in case you want to time table a project it will likely be used, as an example if you need flow one vm from one host to every other host or in case you need shutdown/reboot a vm etc.

Hardware Compatibility List: what's the hardware that compatible with ESX OS.

Q6. What Are Host Profiles? What Licensing Is Required For Host Profiles? Available With Vsphere Enterprise Plus Edition?

A set of quality practice configuration regulations, that are can be implemented to whole cluster or to an individual host. So that each one the hosts in sync with every other, this can avoid vMotion, drs and ha problems.

Q7. How Do You Configure Vmware Virtual Centre Management Server For Ha & Drs? What Are The Conditions To Be Satisfied For This Setup?

HA & DRS are the residences of a Cluster. A Cluster may be created only whilst more than one host delivered, in that case we want to configure HA & DRS as properly to offer High Availability and Load balancing between hosts and for the digital machines.

Q8. Ask About How Ha Works?

VMware HA gives excessive availability for virtual machines with the aid of pooling them and the hosts they are living on right into a cluster. Hosts within the cluster are monitored and within the occasion of a failure, the digital machines on a failed host are restarted on change hosts.

Q9. What Makes Iscsi And Fc Different?

Addressing Scheme, iSCSI is based on IP and FC no longer, and the type of switch of information also. In FC the records transferred as blocks, in iSCSI the information transferred as files. The cabling also, FC uses Fibre cable and iSCSI uses RJ45.

Q10. What Are The Requirements For Converting A Physical Machine To Vm?

An agent wishes to be established at the Physical device.

VI client desires to be set up with Converter Plug-in.

A server to import/export digital machines.

Q11. How To Set The Time Delay For Bios Screen For A Virtual Machine?

Right Click on VM, choose edit settings, select alternatives tab and select boot alternative, set the delay how much you want.

Q12. Can Host Profiles Work With Esx/esxi 3.X Hosts?

No. Only beginning with ESX/ESXi 4.Zero.

Q13. In The Esx Server Licensing Features Vmotion License Is Showing As Not Used, Why?

Even even though the license container is selected, it shows as "License Not Used" until, you allow the VMotion alternative for precise vSwitch.

Q14. What Kind Of Applications Or Setups You Have On You Virtual Machines?

Exchange server and Share Point, but these are for DEMO functions, Citrix presentation servers etc.

Q15. What Is Promiscuous Mode On Vswitch? What Happens If It Sets To Accept?

If the promiscuous mode set to Accept, all the verbal exchange is seen to all of the digital machines, in other words all of the packets are sent to all of the ports on vSwitch.

If the promiscuous mode set to reject, the packets are sent to supposed port, in order that the intended digital machine changed into able to see the conversation.

Q16. What To Do To Customize The Linux/unix Virtual Machine Clone?

VC itself consists of the customization equipment, as those working structures are available as open source.

Q17. Explain Why Vmware Esx Server Is Preferred Over Virtual Server Or Workstation For Enterprise Implementation?

For better useful resource control as it has a virtualization layer worried in its kernel, which communicates with the hardware at once.

Q18. What Is A Template?

We can convert a VM into Template, and it can not be powered on as soon as its changed to template. This is used to short provisioning of VMs.

Q19. True Or False. A Distributed Virtual Switch Is Very Much Like A Physical Switch That Detects Which Vms Are Logically Connected To Each Port And Uses That Information To Forward Network Traffic. Hint:

False. A Distributed Virtual Switch acts as a single transfer across all hosts in a statistics middle to provide centralized provisioning, management, and tracking of digital networks.

Q20. Does The Vswitches Support Vlan Tagging? Why?

Yes, then Switches help VLAN Tagging; otherwise if the digital machines in an esx host are linked to exclusive VLANS, we want to put in a separate bodily nic (vSwitch) for each VLAN. That is the motive Vmware included the VLAN tagging for vSwitches. So every vSwitch helps upto 1016 ports, and BTW they are able to assist 1016 VLANS if needed, however an ESX server doesn’t aid that many VM’s. :)

Q21. Can Host Profiles Work When Using The Cisco Nexus 1000v?

No, due to the fact Host Profiles became designed with the typical vNetwork Distributed Switch. The Cisco Nexus 1000v transfer offers directors first-class-grained control of the networking beyond what Host Profiles can observe.

Q22. What Is Virtual Smp?

When and why need to you supply a vm multiple vCPUs part of their solution could be that quality practice is first of all a unmarried vCPUs due to you could run into overall performance troubles because of CPU scheduling.

Q23. Explain Advantages Or Features Of Vmware Virtual Machine File System (vmfs)?

It's a clustered file device, first rate assist for sharing among ESX servers in a cluster.

Features:

Allows get right of entry to through a couple of ESX Servers at the identical time through implementing profile locking. SCSI Reservations are simplest carried out whilst LUN meta records is up to date (e.G. File call change, file size change, etc.)

Add or delete an ESX Server from a VMware VMFS quantity without disrupting other ESX Server hosts.

LVM lets in for adaptive block sizing and addressing for growing documents permits you to boom a VMFS extent at the fly (by means of spanning a couple of VMFS volumes) With ESX/ESXi four VMFS volumes additionally can be multiplied using LUN growth Optimize your digital system I/O with adjustable volume, disk, record and block sizes. Recover digital machines faster and greater reliably within the event of server failure with Distributed journaling.

Limitations:

Can be shared with as much as 32 ESX Servers. Can assist LUNs with max size of 2TB and a max VMFS length of sixty four TB as of version 4 (vSphere). "There is a VMFS3 drawback in which each tree of connected clones can handiest be run on 8 ESX servers. For example, if there is a tree of disks off the identical base disk with 40 leaf nodes in the tree, all 40 leaf nodes may be concurrently run however they could simplest run on up to 8 ESX hosts." VMFS3 limits documents to 262,a hundred and forty four (218) blocks, which translates to 256 GB for 1 MB block sizes (the default) up to 2 TB for 8 MB block sizes.

Q24. What Are The Type Of Communications Which Requires An Ip Address For Sure?

Service Console and VMKernel (VMotion and iSCSI), these communications does now not take place with out an ip address (Whether it's miles a unmarried or dedicated).

Q25. Vmware Vsphere Gives You Options. What Are The 4 Typical Ways Storage Can Be Added To A Vsphere?

Storage may be introduced thru iSCSI, FC, NFS and neighborhood disk (along with DAS).

Q26. What San Or Nas Boxes Have You Configured Vmware With? How Did You Do That?

Storage group will provide the LUN data, with that we will add the ones LUNs to ESX hosts from VM storage.

Q27. What To Do To Customize The Windows Virtual Machine Clone?

Copy the sysprep documents to Virtual center listing on the server, so that the wizard will take the benefit of it.

Q28. How Do You Configure Clusters, Hosts, And Resource Pools In Vi3?

A cluster is a set of servers working collectively closely as a unmarried server, to provide high availability, load balancing and excessive overall performance. A host is a single x86 computing server with individual computing and memory resources. Resource swimming pools are allocation of the available sources in to portions for the right distribution.

Q29. What Is The Use Of A Port Group?

The port organization segregates the form of communication.

Q30. To Open The Guided Consolidation Tool, What Are The User Requirements?

The consumer must be member of administrator, the consumer have to have "Logon as carrier" privileges - To give a person those privileges, open neighborhood sec coverage, select Logon as provider policy and upload the consumer the user need to have read access to AD to ship queries.

Q31. How The Virtual Machine Port Group Communication Works?

All the vm's that are configured in VM Port Group are in a position to connect with the physical machines on the network. So this port institution enables communication among vSwitch and Physical Switch to connect vm's to Physical Machine.

Q32. This Is A Tough Vmware Interview Question Created Just For You. Name four Things That Happen On The Vmkernel Networking Layer?

VMotion, IP storage (iSCSI/NFS), Fault Tolerance and Virtual SAN.

Q33. What Are The Settings That Are Taken Into To Consideration When We Initiate A Snapshot?

Virtual Machine Configuration (What hardware is attached to it).

State of the Virtual Machine Hard Disk file ( To revert back if wanted).

State of the Virtual Machine Memory (if it's far powered on).

Q34. What Is Promiscuous Mode?

If the promiscuous mode is enabled for a switch, the traffic despatched that transfer can be seen to all vm's related to that transfer. I imply, the statistics can be broadcasted.

Q35. What Are The Common Issues With Snapshots? What Stops From Taking A Snapshot And How To Fix It?

If you configure the VM with Mapped LUN, then the picture failed. If it's miles mapped as digital then we can take a picture of it.

If you configure the VM with Mapped LUNs as bodily, you need to cast off it to take a snapshot.

Q36. In What Different Scenarios Or Methods Can You Manage A Vi3?

Using the Virtual Infrastructure Client we will manage one esx server, using virtual middle we will control greater than 1 esx server. And additionally we will use provider console to manipulate it.

Q37. Does Cloning From Template Happens Between Two Data Centers?

Yes. It can, if the template in a single datacenter, we can set up the vm from that template in every other datacenter with none problem.

Q38. Can Host Profiles Be Used With A Cluster Running Both Esx And Esxi Hosts?

Yes, but take into account to use an ESX host and not an ESXi host to create a profile for use.

In theory, Host Profiles have to work with mixed host clusters, as it translates ESX to ESXi, however be cautious as there are enough differences among ESX and ESXi which could lead you to make self-inflicted mistakes whilst applying Host Profiles. The simplest approach is to create clusters which can be homogeneous and keep two distinctive profiles for those two forms of clusters.

Q39. You Have A Vcp So This Should Be An Easy Interview Question. What Are 2 Ways A Vsphere Admin Can Separate Traffic From Distinct Environments (ex. Production And Test) On The Same Hosts?

Either by way of developing separate vSwitches the usage of dedicated NICs or if NICs are not to be had by using growing separate port businesses using special VLAN IDs on the identical vSwitch.

Q40. What Is The Best Plan For A Storage Failure That Impacts Multiple Data Stores?

Always have a backup of the VMs on a separate storage surroundings that can be used to repair the misplaced virtual servers.

Q41. What Is Resource Pool? What Is The Use Of It?

A resource pool is a logical abstraction for flexible control of sources. Resource pools can be grouped into hierarchies and used to hierarchically partition.

Q42. What Is Mac Address Changes? What Happens If It Is Set To Accept?

When we create a virtual machine the configuration wizard generates a MAC cope with for that system, you could see it in the .Vmx (VM Config) file. If it would not matches with the MAC cope with within the OS this putting does now not allow incoming traffic to the VM. So by way of putting Reject Option both MAC addresses can be stays same and the incoming site visitors will be allowed to the VM.

Q43. What Are Resource Pools & What's The Advantage Of Implementing Them?

A VMware ESX Resource pool is a pool of CPU and memory sources. Inside the pool, assets are allotted based at the CPU and memory stocks that are described. This pool will have associated get admission to control and permissions. Clear control of assets to the digital machines.

Q44. What Is Forged Transmits? What Happens If It Is Set To Accept?

When we create a virtual device the configuration wizard generates a MAC deal with for that machine, you could see it within the .Vmx (VM Config) report. If it does not fits with the MAC address in the OS this placing does no longer permit outgoing visitors from the VM. So with the aid of putting Reject Option each MAC addresses could be remains identical and the outgoing visitors might be allowed from the VM.

Q45. Explain The Physical Topology Of Virtual Infrastructure three Data Centre?

A common VMware Infrastructure statistics middle includes simple bodily building blocks such as x86 computing servers, garage networks and arrays, IP networks, a management server and computer clients.

Q46. What Is Vmware Consolidate Backup (vcb)? Explain Your Work Exposure In This Area?

VMware Consolidated Backup is a backup framework, which enables third party gear to take backups.

VCB is used to help you backup your VMware ESX virtual servers. Essentially, VCB is a "backup proxy server". It isn't backup software program. If you operate VCB, you continue to want backup software program. It is commonly established on its own committed Windows physical server.

Here are the advantages of VMware's VCB:

Centralize backups of VMware ESX Virtual Servers.

Provide record degree backups of VMware ESX Virtual Servers both full and incremental (report level backup available to simplest Windows guests).

Provide photograph degree backups.

Prevent you from having to load a backup agent on every Virtual Machine.

Prevent you from having to shutdown Virtual Machines to get a backup.

Provides LANFree backup due to the fact the VCB server is attached to the SAN through your fibre channel adaptor.

Provides centralized storage of Virtual Server backups on the VCB server that is then moved in your backup tapes through the 3rd celebration backup agent you install.

Reduces the load at the VMware ESX servers by using no longer having to load a 3rd birthday party backup agent on either the VMware ESX provider console or on every digital machine.

Utilizes VMware Snapshots.

Basically, right here is how VCB works:

If you're doing a report level backup, VCB does a image of the VM, mounts the photo, and allows you to backup that hooked up "force" through VCB to your 3rd birthday party backup software.

If you are doing an photograph stage backup of the VM, VCB does a snapshot of the VM, copies the photograph to the VCB server, unsnaps the VM, and allows you to backup the copied picture image together with your 3rd party backup software program.

Q47. How Can You Configure These Different Types Of Data Stores On Esx3.Five?

If we've got FC cards established at the esx servers, by means of going to the garage choice, we will scan for the lungs.

Q48. What Are Host Profiles?

A set of exceptional exercise configuration policies, that are may be applied to entire cluster or to an man or woman host. So that each one the hosts in sync with every other, this will keep away from vMotion, drs and ha problems.

Q49. What Is Vmware Consolidated Backup?

It is a backup framework that supports third celebration utilities to take backups of ESX servers and Virtual Machines. It’s now not a backup provider.

Q50. What Are The Differences Between Esx And Esxi?

ESX is an OS with complete capabilities of virtualization; ESXi is a restrained capabilities OS with 32MB image.