VMware interview questions

1. What is Distributed switch (vDS)?
2. Difference between vDS and Cisco nexus switch and standard switch?

3. if the VC is down than will distributed switch work?

4. what is the requirements for installing vCenter?

5. How much minimum RAM and space need for vCenter Installation?
6. Role of vpxa client and working
7. Difference between Esx and Esxi?
8. Difference between esx3.5, vsphere4 and vsphere 5?
9. Licensing in vSphere 5 and different types of licenses and their difference?
10. Different method to upgrade ESX server?
11. What is host profile, auto deploy and image builder?
12. What is FT, requirement and how to configure FT and how FT works?

13. How to increase the size of Hard disk in win 2008 and win 2003?

14. What is Hot cpu / Add ram?

15. How hot cpu /ram works of 2008 and 2003 whether we need a reboot for applying hot cpu/add ram?

16.What is PSA?

17. What is VAAI?

18. SCSI reservation?

19. SCSI reservation has been removed in vSphere 5?

20. How data integrity is achieved in vSphere 5?

21. : HA difference between vsphere4 and vsphere5?

22. RDM and what types of RDM?

23. why we use VLAN ID 4095?

24. What is VGT?

25. vMotion does not check vSwitch port availabilty?

26. I have migrate a VM from one ESX host to another but now it is not pinging, how u will troubleshoot and what are the possible cause of this?

Ans: 4one possible would be non availability of pots on vSwitch

27. How storage DRS works?

28. Different types of load balancing policy at the vSwiitch?

29. What is becon probing?

30. Different security policies at the vSwitch?

31. If we don'tt have VMware tool on VM, can we take snapshot?

32. What happened in the background if we commit the snapshot?

33. How many log files get created in VM folder and what would be there sequence?

34.  Once u take snapshot, How much MB delta file get created in?

35. What is CBT?

36. How u will troubleshoot different types of snapshot problems?

37. How vMotion works?

38. What is jumbo frames and it requirements?

39. Link aggregation and its requirements?

40. Snapshot implementation has been changed in vsphere5. What are the changes?

41.  Snapshot files are visible in snapshot manager but they visible in console.  How u will delete these snapshot files?

42. How u will troubleshooting the locked files issues?

43. One user is complaining that his server is working very slow. How u will troubleshoot this issue?

44. What is storage I/O control?

45. What is network I/o control?

46. one user is not able to take the RDP of a server but the server is pinging. How will you resolve the issue?

47. The server is showing black screen in vSphere client. How will you analyze the issue?

48. what are affinity and anti affinity rules and what's the other rule apart of these two rules in vSphere 5?

49. While powering on a VM, you are getting different errors u should know how to troubleshoot these kind of errors

50. What is VMware cloud director and use of it?

51. What is Vshield and use of it?

52. What is VDR?

53. What is the limitations of FC and iSCSI Datastore in VDR?

54. What is integrity check in VDR?

55. How u will disable balloning in a VM?

56.  What type we should use while doing P2V (volume based or file based)?

57. Does RDM format the LUN in VMDK or not or it create pointer file?

58.  Unable to start virtual center service what to troubleshoot and how?

59. VM is responding very slow. how to troubleshoot (like CPU contention, Storage latency, Memory issue.)?
60. We have taken snapshot and revert to the snapshot . now what will happened to existing snapshot , will it remove or will it exist?

61. How to enable Paravirtualization in Disk and Network?

62. How to check the storage, cpu, memory or disk related problem through esxtop?

63. On Path selection policy like fixed, MRU, RR. how it works in background?

64. what is difference between storage based replication and host based replication in VMware SRM. which one to use , when and why?

65. how election process between many esxi host occurs in one cluster(Vsphere4, 5 and Vsphere 5.1)

67. how to do p2v using Vmware converter and what are the ports requirement for P2V?

68. How to imgrate(P2V) a SQL server without any downtime using vmware converter?

69. List of check performed before and after P2V process?

70. List of issues faced at the time of P2V?

71.  How the windows licensing works in the VMware enviornment?

72. After the manual vmotion of a two VMs from one esx host to another esx host in a cluster, I am not able to ping one VM, but i am able to ping the second VM?what is the reason behind this.....

73. After the Vmotion of a VM, how does the physical switch knows that the VM is migrated to another esx host and now switch must  send packets to the new esx host's virtual switch on which VM is currently residing?

74. Background process of a P2V operation

75. Architecural differennce between the HA of 4.0 and 5.0

76. How to upgrade ESX 3.5 to ESX 5.0 

77. Requirements and steps for the installation of vcloud Director

78. Steps for integrating of  vCloud director with AD

79. Can the VMs created by vCloud director be protected by SRM?

80. Can we assign RDM to a VM created by vCloud director?

81. Can we are able to  take the Backup of VM created by vCloud director through VDR?

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1. How CLoning Process works in the background???
3. How to upgrade the VM from ESXi4.0 to 5.0
6. how to confirm vm is powerdoff and vmfs release all locks
7. How to restart ESX Management Agent
8. Installation steps of ESXi Server
9. Storage SAN,NAS, iSCSI Differences
10.iSCSI Software initiator port number
11.How to troubleshoot if we found that vm performance issue
12.what is scratch partition
13.How to troubleshoot if esxi are in shutdown state
14.Define your vmware environment
15. what are the troubleshoot you had faced.
16.VMware ESXi 4 and ESXi 5 differences
17.how to check the state of VM using command line
18.What is nic Teaming?
19.background process of vmotion?
20.ha & drs Background process
21.what is Distrubuted switch
22.how do assign a lun to esx server, how will identify the lun to esx
23.Define ESX Memory Ballooning and Setting Reservations
25.how will you troubleshoot if your HA is fail
26.prerequisite of HA and DRS
28.Can we move vm between two data center
29.If vm are showing vmks error and vm are unable to boot then how will you troubleshoot.
30. Difference between ESX & ESXi
31. Difference between HA & Vmotion
32. If vCenter goes down, will HA work?
33. Difference between FT & HA
34. Traffic Shaping and NIC Teaming.
35.show me vmware vshpere architecture
36. what is drs how work in background
37. what is EVC ?
38.what is different template & clone
39when you create vm that time how many file crateed in background like ( vmdk vmx )
40.what current hardware version
41.any snapshot vm  can do vmotion no than why?
42.what is esx4.0 block and file size.?
42.what is esx5.0 block size?
43. difference distributed and private switch ? 

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1. Unable to do storage vmotion from one datastore to other?

2. How will you troubleshoot a host getting rebooted frequently?

3. Pre-requistes for upgrading hardware version?

4. Can we create resourcepool without Vcenter?

5.  all vm's in a host is getting rebooted, how to troubleshoot? 

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7. How to restart ESX Management Agent?

Restarting the Management agents on ESXi

You can restart using below methods,

1. From the Direct Console User Interface (DCUI)
2. From the Local Console or SSH:

• Log in to SSH or Local console as root.
• Run these commands:
  
  /etc/init.d/hostd restart
    /etc/init.d/vpxa restart
  
• Alternatively, to restart all management agents on the host, run the command:
  
    services.sh restart
  
  
  10. iSCSI Software initiator port number?
  
  
  Ans: 3260 TCP
  
  
  12. What is scratch partition?
  
  
  Ans: The scratch partion is a 4 GB VFAT partition that is created on a target device that has sufficient space available and is considered “Local” by ESXi.
  The scratch partition is used for a couple of things:
  * Store vm-support output (if scratch partition is unavailable the output will be stored in memory)
  * During first boot the partition will be configured through syslog for retaining logfiles
  * Userworld swapfile (when enabled)
  The scratch partition is created and configured during ESXi installation or the autoconfiguration phase when the ESXi server first boots.

License for each Edition
Standard     per VM   10 VM means 10 license
Enterprise   per VM    10 VM means 3 License(1 enterprise license for 4 VMs)
Datacenter per socket   2 socket means 2 license.Unlimited VM per box

VMware - The network bridge on device vmnet0 is not running

After upgrading windows from 8.1 to Windows10, my vmware interface stop working. To fix this issue, follow the steps below.

1. Open your network and Sharing Center by right clicking network icon on right side bottom of the windows.
2. On network and sharing center windows on left top side, click on change adopter setting.
3. Double Click on your adapter (either wireless or physical) and click on properties.
4. Properties windows pops up.
5. Click on Install on left bottom side.
6. Now, double click on Service
7. Click on VMware Bridge protocol and click ok to close the windows.
8. Now, login to your virtual server and verify your network connectivity.

AWS VPC “ What is VPC , Subnet, Routing Table & IGW ? ”

What is VPC ?

• A virtual private cloud (VPC) is a virtual network dedicated to your AWS account.
• It is logically isolated from other virtual networks in the AWS cloud.
• This virtual network closely resembles a traditional network that you’d operate in your own data center.
• You can launch your AWS resources, such as Amazon EC2 instances, into your VPC.

What is Subnet?

• A subnet is a range of IP addresses in your VPC.
• You can launch AWS resources into a subnet that you select.
• Use a public subnet for resources that must be connected to the Internet
• Use a private subnet for resources that won’t be connected to the Internet.

What is Routing Table?

• A route table contains a set of rules, called routes, that are used to determine where network traffic is directed.
• Each subnet in your VPC must be associated with a route table; the table controls the routing for the subnet.
• A subnet can only be associated with one route table at a time, but you can associate multiple subnets with the same route table.

What is Internet Gateway (IGW) ?

• An Internet gateway is a horizontally scaled, redundant, and highly available VPC component that allows communication between instances in your VPC and the Internet.
• It therefore imposes no availability risks or bandwidth constraints on your network traffic.
• An Internet gateway serves two purposes:
• Provide a target in your VPC route tables for Internet-routable traffic.
• Perform network address translation (NAT) for instances that have been assigned public IP addresses.

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