Q.1 What is virtualization in cloud computing?
Creating physical servers
Running multiple OS on one machine
Storing data in the cloud
Designing cloud applications
Explanation - Virtualization allows multiple operating systems to run on a single physical machine by abstracting hardware resources.
Correct answer is: Running multiple OS on one machine
Q.2 Which component manages virtual machines in virtualization?
Operating System
Hypervisor
Database
Compiler
Explanation - A hypervisor is software that creates and manages virtual machines by abstracting hardware.
Correct answer is: Hypervisor
Q.3 What is Type 1 hypervisor also known as?
Bare-metal hypervisor
Hosted hypervisor
Cloud hypervisor
Kernel hypervisor
Explanation - Type 1 hypervisors run directly on the physical hardware without a host operating system.
Correct answer is: Bare-metal hypervisor
Q.4 Which of the following is an example of a Type 2 hypervisor?
VMware ESXi
Microsoft Hyper-V Server
Oracle VirtualBox
XenServer
Explanation - Type 2 hypervisors like VirtualBox run on a host OS, unlike Type 1 which run on bare metal.
Correct answer is: Oracle VirtualBox
Q.5 What is the main advantage of virtualization?
Increased power usage
Resource isolation
Reduced performance
Limited scalability
Explanation - Virtualization provides isolation of resources, allowing better efficiency and utilization.
Correct answer is: Resource isolation
Q.6 In virtualization, a virtual machine (VM) is best described as:
A physical computer
A software-based emulation of a computer
A storage device
A networking router
Explanation - VMs are software emulations of physical machines that run operating systems and applications.
Correct answer is: A software-based emulation of a computer
Q.7 Which virtualization technique allows multiple OS kernels to share the same hardware?
Full virtualization
Paravirtualization
Containerization
Segmentation
Explanation - Full virtualization abstracts the hardware completely, allowing multiple OS kernels to run independently.
Correct answer is: Full virtualization
Q.8 Which company developed VMware, a popular virtualization product?
Google
Microsoft
VMware Inc.
Amazon
Explanation - VMware Inc. pioneered x86 virtualization and developed VMware ESXi and Workstation.
Correct answer is: VMware Inc.
Q.9 What is the main function of a hypervisor?
Manage databases
Distribute network packets
Allocate hardware resources to VMs
Encrypt data
Explanation - The hypervisor allocates CPU, memory, and other hardware resources among multiple virtual machines.
Correct answer is: Allocate hardware resources to VMs
Q.10 Which type of virtualization allows multiple applications to run in isolated environments but share the same OS kernel?
Server virtualization
Storage virtualization
Containerization
Desktop virtualization
Explanation - Containerization allows applications to share the same OS kernel while running in isolated environments.
Correct answer is: Containerization
Q.11 KVM in Linux stands for:
Kernel Virtual Machine
Key Virtual Module
Kernel Volume Manager
Kernel Visual Memory
Explanation - KVM (Kernel Virtual Machine) is a Linux-based open-source hypervisor.
Correct answer is: Kernel Virtual Machine
Q.12 Which of the following is NOT a benefit of virtualization?
Improved resource utilization
Disaster recovery
Increased hardware costs
Flexibility in deployment
Explanation - Virtualization reduces hardware costs by allowing multiple workloads on one machine.
Correct answer is: Increased hardware costs
Q.13 Which virtualization method requires modified guest OS for better performance?
Full virtualization
Paravirtualization
Containerization
Hardware virtualization
Explanation - Paravirtualization modifies the guest OS to communicate efficiently with the hypervisor.
Correct answer is: Paravirtualization
Q.14 In virtualization, what does 'live migration' refer to?
Moving physical servers between racks
Shutting down a VM permanently
Transferring a running VM between hosts
Copying storage data to cloud
Explanation - Live migration moves a running virtual machine between physical hosts without downtime.
Correct answer is: Transferring a running VM between hosts
Q.15 Which of the following is an open-source hypervisor?
VMware ESXi
Microsoft Hyper-V
Oracle VirtualBox
Xen
Explanation - Xen is a popular open-source hypervisor widely used in cloud platforms.
Correct answer is: Xen
Q.16 What is the main challenge in virtualization?
Increased flexibility
Security risks from VM isolation failures
Lower resource utilization
Improved scalability
Explanation - Virtualization can face security risks if isolation between VMs is compromised.
Correct answer is: Security risks from VM isolation failures
Q.17 Desktop virtualization allows:
Multiple OS in one VM
Running desktop environments remotely
Building physical desktops
Designing web pages
Explanation - Desktop virtualization allows users to access a virtual desktop environment from a remote device.
Correct answer is: Running desktop environments remotely
Q.18 Which virtualization technique reduces OS overhead by sharing one kernel?
Paravirtualization
Full virtualization
Containerization
Desktop virtualization
Explanation - Containers share the same OS kernel, making them lightweight compared to full VMs.
Correct answer is: Containerization
Q.19 VMware ESXi is an example of:
Type 1 hypervisor
Type 2 hypervisor
Containerization
Cloud platform
Explanation - VMware ESXi is a bare-metal hypervisor that runs directly on hardware.
Correct answer is: Type 1 hypervisor
Q.20 Which virtualization concept allows dynamic allocation of CPU and memory?
Overcommitment
Load balancing
Clustering
Redundancy
Explanation - Overcommitment allows allocation of more virtual resources than physically available, managed dynamically.
Correct answer is: Overcommitment
Q.21 What does 'snapshot' in virtualization mean?
A backup of a VM state at a given time
A full OS reinstall
A copy of hypervisor settings
A cloud API request
Explanation - A snapshot captures the VM's state and data at a specific moment, useful for rollback.
Correct answer is: A backup of a VM state at a given time
Q.22 Which virtualization technique is used in Docker?
Full virtualization
Containerization
Paravirtualization
Hardware emulation
Explanation - Docker uses containerization technology for lightweight virtualization.
Correct answer is: Containerization
Q.23 What is the main drawback of Type 2 hypervisors?
Less hardware utilization
Lower security
Dependency on host OS performance
No VM migration
Explanation - Type 2 hypervisors depend on the host OS, which may reduce performance.
Correct answer is: Dependency on host OS performance
Q.24 Which cloud model benefits most from virtualization?
IaaS
PaaS
SaaS
FaaS
Explanation - Infrastructure as a Service (IaaS) relies heavily on virtualization to deliver computing resources.
Correct answer is: IaaS
Q.25 In virtualization, thin provisioning refers to:
Allocating more virtual storage than physical
Compressing memory usage
Reducing CPU overhead
Running fewer VMs
Explanation - Thin provisioning allows allocating more virtual storage than is physically available, using it efficiently.
Correct answer is: Allocating more virtual storage than physical