Virtualization in Cloud Computing Questions and Answers for Viva

Answer-1: Virtualization is the process of creating virtual instances of physical resources like servers, storage, and networks to optimize hardware usage.

Answer-2: It enables resource sharing, efficient utilization, and isolation between different environments on the same physical hardware.

Answer-3: Server virtualization, storage virtualization, network virtualization, desktop virtualization, and application virtualization.

Answer-4: It partitions a physical server into multiple virtual servers using a hypervisor.

Answer-5: A hypervisor is software that creates and manages virtual machines by allocating resources from the host hardware.

Answer-6: Type 1 (bare-metal) and Type 2 (hosted).

Answer-7: Type 1 runs directly on hardware; Type 2 runs on an operating system.

Answer-8: VMware ESXi, Microsoft Hyper-V, KVM, Xen.

Answer-9: Oracle VirtualBox, VMware Workstation, Parallels Desktop.

Answer-10: It allows rapid provisioning and scaling of virtual machines as needed.

Answer-11: A VM is a software emulation of a physical computer that runs an OS and applications.

Answer-12: Cost savings, efficient resource use, isolation, flexibility, and easier backups.

Answer-13: They enable cloud providers to run multiple OS instances on a single physical machine.

Answer-14: It is the process of moving a virtual machine from one host to another with minimal downtime.

Answer-15: Moving a running VM to another host without interrupting the user experience.

Answer-16: Virtualization is the technology; cloud computing is a service model that often uses virtualization.

Answer-17: VMs can be easily backed up and restored on different hardware.

Answer-18: Containerization packages apps with dependencies; virtualization emulates entire operating systems.

Answer-19: It uses CPU extensions to improve performance and isolation in virtualized environments.

Answer-20: A virtualization method where the guest OS is aware of the hypervisor and can interact more efficiently with it.

Answer-21: They manage the creation and operation of virtual machines across cloud servers.

Answer-22: By isolating VMs, it prevents one compromised machine from affecting others.

Answer-23: Yes, virtualization allows running different OSes on the same physical machine.

Answer-24: It pools physical storage from multiple devices into a single, manageable virtual storage unit.

Answer-25: It abstracts physical networking components into virtual networks for better flexibility and control.

Answer-26: It consolidates hardware, reducing physical infrastructure needs and energy consumption.

Answer-27: It enables users to access desktop environments hosted on central servers from any device.

Answer-28: Virtualization shares hardware resources; emulation replicates hardware in software.

Answer-29: A pre-configured VM image designed to perform a specific function or run a specific application.

Answer-30: Running a virtual machine inside another virtual machine.

Answer-31: Performance overhead, VM sprawl, licensing complexity, and security concerns.

Answer-32: It isolates environments for different users on the same physical infrastructure.

Answer-33: By distributing workloads across VMs to ensure optimal resource use and performance.

Answer-34: To extend physical memory by using disk storage as additional RAM.

Answer-35: Yes, database virtualization separates the database from physical hardware to increase flexibility.

Answer-36: Allocating more virtual resources than are physically available, relying on the fact not all VMs use their full capacity simultaneously.

Answer-37: They are saved states of a VM that can be restored later.

Answer-38: A software-based switch that connects VMs within a host or between hosts.

Answer-39: It provides fast and isolated environments for development, testing, and deployment.

Answer-40: A virtual processor assigned to a VM, representing a portion of a physical CPU.

Answer-41: A virtual network interface card used by a VM to connect to virtual or physical networks.

Answer-42: A file that emulates a physical hard drive for use by a VM.

Answer-43: Each VM operates independently with dedicated virtual resources and access control.

Answer-44: Yes, encryption can protect VM data at rest and in transit.

Answer-45: Combining multiple hypervisors into a single system for high availability and resource sharing.

Answer-46: A lightweight device that accesses virtual desktops or apps hosted on a server.

Answer-47: It provides reproducible, isolated, and disposable environments quickly.

Answer-48: Uncontrolled growth of VMs; managed through governance, policies, and automation.

Answer-49: Automated coordination and management of multiple virtual environments and resources.

Answer-50: Using tools to track VM performance, resource usage, uptime, and security.