DXC Technology Vmware Administrator Interview Questions and Answers

Q1. 1. What is Virtualization ? 2. Thin & Thick provison ? 3. Snapshot background process? 4. VM files ? 5. vCenter Migration steps?
Ans. 
Virtualization is the process of creating a virtual version of a device or resource, such as a server, storage device, network or operating system.
• Virtualization allows multiple virtual machines to run on a single physical machine, maximizing resources and increasing efficiency.

• Thin provisioning allocates storage space on an as-needed basis, while thick provisioning allocates all required space upfront.

• Snapshots captur...read more
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Q2. Explain ESXi OS upgrade and rollback procedures ?
Ans. 
ESXi OS upgrade and rollback procedures involve careful planning and execution to ensure system stability.
• Before upgrading, ensure compatibility with hardware and software requirements

• Take backups of important data and configurations

• Use VMware Update Manager or command line interface for upgrade process

• Monitor upgrade progress and resolve any issues that may arise

• For rollback, restore from backups taken before upgrade
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Q3. What is thick provisioned eager and lazy zero ?
Ans. 
Thick provisioned eager and lazy zero are types of disk provisioning in VMware.
• Thick provisioned eager zeroed: allocates all the space for a virtual disk at the time of creation and zeros out the disk blocks immediately.

• Thick provisioned lazy zeroed: allocates all the space for a virtual disk at the time of creation but does not zero out the disk blocks until data is written to them.
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Q4. Snapshot background process while initiating through vCenter or ESXi host ?
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Snapshot background process involves creating a point-in-time copy of a virtual machine's disk file.
• Snapshots are created to capture the current state of a virtual machine's disk file

• When a snapshot is initiated through vCenter or ESXi host, a background process is triggered to create the snapshot

• The background process involves freezing the virtual machine's disk file, creating a delta disk to store changes, and redire
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Q5. What is lockdown technology in VMware ?
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Lockdown technology in VMware restricts access to the ESXi host directly, allowing only authorized users to perform specific actions.
• Lockdown mode can be enabled to prevent direct access to the ESXi host

• Only users with specific permissions can perform actions on the host

• Helps enhance security by limiting access to the host

• Can be configured through the vSphere Client or vSphere Web Client
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Q1. Database Management system SQL and PlSQL
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Q2. C Language and C++ Language And Data base Management system SQL and PlSQL and Java
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Q3. Database Management system
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Q4. Sql ad PlSQL Mango Data For Loop and While loop
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Q5. C language andC ++ Language and Java
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Reasoning arthemetic

Basic coding skills technical questions

Q1. Check my language skills?
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Q2. What is OSI layer with examples?
Ans. 
OSI (Open Systems Interconnection) model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system.
• OSI model has 7 layers, each layer has a specific function and communicates with the layer above and below it.

• Examples of OSI layers are: Physical layer (transmitting bits over a medium), Data link layer (framing data into packets), Network layer (rout...read more
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Q3. What are CMD commands usually used?
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CMD commands are used for various tasks like managing files, network settings, system configurations, and more.
• CMD commands are used to navigate and manage files and directories on a computer.

• They can be used to configure network settings and troubleshoot network issues.

• CMD commands can also be used to manage system configurations and services.

• Some commonly used CMD commands include dir, cd, ipconfig, ping, netstat, an
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