Interview Questions.

Q1. What is VMKernel and why it's far important?

Ans: VMkernel is a virtualization interface among a Virtual Machine and the ESXi host which shops VMs. It is accountable to allocate all available resources of ESXi host to VMs together with reminiscence, CPU, storage etc. It’s additionally control special offerings which include vMotion, Fault tolerance, NFS, site visitors management and iSCSI. To get entry to these services, VMkernel port can be configured on ESXi server the usage of a fashionable or disbursed vSwitch. Without VMkernel, hosted VMs cannot talk with ESXi server.

Q2. What is VMware FT?

Ans: FT stands for Fault Tolerance very distinguished issue of VMware vSphere. It provides non-stop availability for VMs when an ESXi host fails. It helps up to four vCPUs and 64 GB memory. FT may be very bandwidth intensive and 10GB NIC is suggested to configure it. It creates whole replica of a whole VM along with storage, compute, and memory.

Q3. What is datastore?

Ans: Datastore is a garage area where virtual gadget files are stored and accessed. Datastore is primarily based on a report machine which is known as VMFS, NFS.

Q4. What is Fault Tolerant Logging?

Ans: The communique between two ESXi host is known as FT logging while FT is configured between them. The pre-requisition of configuring FT is to configure VMKernel port

Q5. What is the .Vmx report?

Ans: It is the configuration record of a VM

Q6. What data .Nvram record shops?

Ans: It stores BIOS associated statistics of a VM.

Q7. What .Vmdk record does and used?

Ans: Vmdk is a VM disk file and shops information of a VM. It can be up to sixty two TB in size in vSphere 6.0 version.

Q8. What is virtual networking?

Ans: A network of VMs running on a bodily server which might be related logically with every different is known as virtual networking.

Q9. What is vSS?

Ans: vSS stands for Virtual Standard Switch is chargeable for conversation of VMs hosted on a unmarried physical host. It really works like a bodily switch automatically detects a VM which need to speak with different VM on a identical bodily server.

Q10. What is vDS?

Ans: vDS stands for Virtual Distributed Switch acts as a single transfer in entire virtual environment and is accountable to provide central provisioning, management, and monitoring of digital community.

Q11. What is hypervisor and its types?

Ans: Hypervisor is a virtualization layer that permits a couple of working structures to proportion a single hardware host.  Each running machine or VM is allotted bodily assets such as reminiscence, CPU, garage and many others by the host. There are  types of hypervisors

Hosted hypervisor (works as utility i-e VMware Workstation)

Bare-metal (is virtualization software i-e VMvisor, hyper-V that's set up directly onto the hardware and controls all physical sources).

Q12. What is the primary protection step to at ease vCenter Server and users?

Ans: Authenticate vCenter Server with Active Directory. By using this we will assign unique roles to customers and also can manage virtual surroundings in an efficient way.

Q13. What is Virtualization?

Ans: The method of making virtual versions of bodily components i-e Servers, Storage Devices, Network Devices on a physical host is called virtualization. Virtualization lets you run a couple of digital machines on a unmarried physical device which is referred to as ESXi host.

HubSpot Video
 

Q14. What are one-of-a-kind types of virtualization?

Ans: There are five basic kinds of virtualization

Server virtualization: consolidates the bodily server and multiple OS can be run on a unmarried server.

Network Virtualization: Provides entire duplicate of bodily network right into a software program described community.

Storage Virtualization: Provides an abstraction layer for physical storage resources to control and optimize in digital deployment.

Application Virtualization: improved mobility of applications and lets in migration of VMs from host on some other with minimal downtime.

Desktop Virtualization: virtualize computing device to lessen cost and growth provider

Q15. How many vCPUs can be used for a VM in FT?

Ans: In vSphere 6.0, there can be as much as 4 vCPUs and sixty four GB RAM may be used.

Q16. What is the name of the era used by VMware FT?

Ans: vLockstep generation is used by VMware FT

Q17. Will the FT work if vCenter Server goes down?

Ans: vCenter server is best required to permit Fault Tolerance on a VM. Once it is configured, vCenter isn't required to be in on-line for FT to work. FT failover among primary and secondary will occur although the vCenter is down.

Q18. What is most important difference between VMware HA and FT?

Ans: Main difference among VMware HA and FT is: HA is enabled per cluster and VMware FT is enabled consistent with VM. In HA, VMs can be re-started and powered-on on some other host in case of host failure, even as in FT there is no downtime, because second replica could be activated in case of host failure.

Q19. How many maximum wellknown ports according to host available?

Ans: 4096 ports according to host are to be had either in wellknown transfer or dispensed transfer.

Q20. What are predominant benefits of disbursed transfer (vDS)?

Ans: vDS can offer:

Central management for a statistics middle

Central provision, and

Monitoring

Q21. What is VMKernal adapter and why it used?

Ans: VMKernel adapter offers community connectivity to the ESXi host to deal with community visitors for vMotion, IP Storage, NAS, Fault Tolerance, and vSAN. For each sort of traffic together with vMotion, vSAN and so forth. Separate VMKernal adapter have to be created and configured.

Q22. What are main use of port organizations in facts middle virtualization?

Ans: You can segregate the network site visitors through the use of port groups including vMotion, FT, management visitors and so on.

Q23. What are 3 port companies are configured in ESXi networking?

Ans:

Virtual Machine Port Group – Used for Virtual Machine Network

Service Console Port Group – Used for Service Console Communications

VMKernel Port Group – Used for VMotion, iSCSI, NFS Communications

Q24. What is VLAN and why use in virtual networking?

Ans: A logical configuration on the switch port to segment the IP Traffic wherein every phase cannot communicate with other phase without proper rules noted is called VLAN and each VLAN has a right number called VLAN ID.

Q25. What is VLAN Tagging?

Ans: The exercise of placing VLAN ID into a packet header to perceive which VLAN packet belongs to is known as VLAN tagging.

Q26. What is promiscuous mode on vSwitch?

Ans: The default mode is Reject. If Accept is chosen, VM will receive all site visitors port organization through vSwitch.

Q27. What is MAC deal with changes community policy?

Ans: The default mode of this policy is Reject. If the Accept is chosen, host will accept requests to trade the powerful MAC cope with.

Q28. What is vRealize Operation (vROP)

Ans: vROP presents the operation dashboards for performance analytics, capability optimization and monitoring the virtual surroundings.

Q29. What is VM Hardware model for vSphere 6.0?

Ans: Version 11

Q30. What VM hardware model for vSphere 6.5?

Ans: Version 13

Q31. In which model of vSphere PSC became introduce?

Ans: Platform Services Controller (PSC) is brought in vSphere 6.0. VSphere 6.0 is likewise referred to as Virtual hardware version 11.

Q32. What is Forged transmits community coverage?

Ans: The default mode is Reject. If Accept is chosen, host will now not evaluate the supply and powerful MAC deal with transmitted from a VM.

Q33. What are predominant additives of vCenter Server architecture?

Ans: There are three predominant components of vCenter Server structure.

VSphere Client and Web Client: a consumer interface.

VCenter Server database: SQL server or embedded PostgreSQL to keep inventory, security roles, aid pools and so forth.

SSO: a security area in virtual environment

Q34. What is PSC and its components?

Ans: PSC stands for Platform Services Controller first introduced in model 6 of VMware vSphere which handles infrastructure safety capabilities. It has 3 essential components.

Single Sign-On (SSO)

VMware Certificate Authority (CA)

Licensing provider

Q35. What are  major deploying methods of PSC

Ans: You can deploy PSC in  approaches:

Embedded

centralized

Q36. What are 3 network protection rules/modes on vSwitch?

Ans:

Promiscuous mode

MAC cope with alternate

Forged transmits

Q37. What are extraordinary forms of vCenter Server deployment?

Ans: It has  deployment types

Embedded deployment

External deployment

Q38. How many most hosts can manipulate a vCenter Server in vSphere 6.0?

Ans: In vSphere 6.0, a single vCenter Server can manipulate up to a thousand hosts either in Windows or in vCenter Appliance (vCSA).

Q39. How many hosts may be controlled with the aid of a cluster in vSphere 6.0?

Ans: A unmarried cluster can manipulate most sixty four hosts

Q40. How many disk kinds are in VMware?

Ans: There are three disk sorts in vSphere.

Thick Provisioned Lazy Zeroes: each virtual disk is created by way of default in this disk layout. Physical area is allotted to a VM whilst digital disk is created. It can’t be converted to thin disk.

Thick Provision Eager Zeroes: this disk type is utilized in VMware Fault Tolerance. All required disk space is allotted to a VM at time of creation. It takes more time to create a digital disk examine to other disk formats.

Thin provision: It provides on-demand allocation of disk area to a VM. When statistics length grows, the size of disk will develop. Storage capacity utilization can be as much as a hundred% with thin provisioning.