VMWare Interview Questions & Answers

      

1. VMWare Kernel is a Proprietary Kenral and is not based on any of the UNIX operating systems, it's a kernel developed by VMWare Company.

2. The VMKernel can't boot it by itself, so that it takes the help of the 3rd party operating system. In VMWare case the kernel is booted by RedHat Linux operating system which is known as service console.

3. The service console is developed based up on Redhat Linux Operating system, it is used to manage the VMKernel 

4. To restart webaccess service on vmware
service vmware-webaccess restart – this will restart apache tomcat app

5. To restart ssh service on vmware
service sshd restart

6. To restart host agent(vmware-hostd) on vmware esx server
service mgmt-vmware restart

What is Private VLAN and Port Types ?

Private VLANs provide layer 2 isolation between ports within the same broadcast domain. 


There are three types of PVLAN ports:

• Promiscuous— :->A promiscuous port can communicate with all interfaces, including the isolated and community ports within a PVLAN.
• Isolated—:-> An isolated port has complete Layer 2 separation from the other ports within the same PVLAN, but not from the promiscuous ports. PVLANs block all traffic to isolated ports except traffic from promiscuous ports. Traffic from isolated port is forwarded only to promiscuous ports.
• Community:->— Community ports communicate among themselves and with their promiscuous ports. These interfaces are separated at Layer 2 from all other interfaces in other communities or isolated ports within their PVLAN.

What is a Difference Between NAT and Proxy Server ?

Proxy Server:->

Proxy server An application-based translation of network access requests.Provision for local user authentication for access to untrusted network. Logging and control of port/protocol access may be possible. Normally used to connect two networks.

NAT :->

Network Address Application-based translation of requests for service or Translation (NAT) connection to an external network. No user authentication is possible, and port/protocol filtering is not usually performed here. Used to redirect requests through one interface. Requests for connection at outside interface must have originated from inside host or they are dropped.

What is DMZ ?

A computer host or small network inserted as a “neutral zone” between a company’s private network and the outside public network. The DMZ prevents outside users from getting direct access to a server that has company data. (The term comes from the geographic buffer zone that was set up between North
Korea and South Korea following the United Nations “police action” in the early 1950s.) A DMZ is an optional and more secure approach to a firewall and effectively acts as a proxy Server.

New Features and Improvements in VMware Workstation 10.0.1

New Features and Improvements in VMware Workstation 10.0.1

VMware Workstation 10 delivers best-in-class Windows 8 support, and innovative

new features that transform the way technical professionals work with virtual

machines, whether they reside on their PCs or on private enterprise clouds.

  

*New Operating System Support

 Support has been added for:

-Windows 8.1

-Windows 8.1 Enterprise

-Windows Server 2012 R2

-Ubuntu 13.10

As well as for the latest Fedora, CentOS, Red Hat and OpenSUSE releases.

*VMware Hardware Version 10

This version of VMware Workstation includes VMware hardware Version 10 and is

compatible with vSphere 5.5. Hardware versions introduce new virtual hardware

functionality and new features while enabling VMware to run legacy operating

systems in our virtual machines. New features included in this hardware

version:

*16 vCPUs

Virtual machines can now run with up to 16 virtual CPUs. This enables very

processor intensive applications to be run in a virtual machine.

Note: Running virtual machines with 16 vCPUs requires that both your host

and guest operating system support 16 logical processors. Your physical

machine must have at least 8 cores with hyper-threading enabled to power

on a virtual machine with this configuration.

What is the Difference between Hyper-V 2.0 and Hyper-V 3.0

What is the Difference between Hyper-V 2.0 and Hyper-V 3.0
The maximum number of virtual machines per host that can be powered on at any given time

Hyper-V 2.0
384

Hyper-V 3.0
1024


Maximum number of virtual machines in a cluster

Hyper-V 2.0
1000

Hyper-V 3.0
4000

Maximum number of hosts per cluster

Hyper-V 2.0
16

Hyper-V 3.0
63

Maximum RAM per host server

Hyper-V 2.0
1 TB

Hyper-V 3.0

2 TB

RAID Levels Supported By Windows Server 2012

RAID 0 (Disk striping)

Two or more volumes, each on a separate drive, are configured as a striped set. Data is broken into blocks, called stripes, and then written sequentially to all drives in the striped set.

Advantages: Speed and performance.

 

RAID 1(Disk mirroring)

Two volumes on two drives are configured identically. Data is written to both drives. If one drive fails, no data loss occurs because the other drive contains the data. (This level doesn’t include disk striping.)

Advantages: Better write performance than disk striping with parity.

 

RAID 5(Disk striping with parity)

Uses three or more volumes, each on a separate drive, to create a striped set with parity error checking. In the case of failure, data can be recovered.

Advantages : Fault tolerance with less overhead than mirroring. Better read performance than disk mirroring.