4.2 Purposes of VMs

Question 1

What is virtualization?

Answer 1

Virtualization creates virtual versions of hardware, enabling multiple operating systems to run on one physical machine using hypervisors.

Question 2

What are the two types of hypervisors?

Answer 2

Type 1 (bare metal) runs directly on hardware; Type 2 (hosted) runs on top of an operating system.

Question 3

What is the main purpose of virtualization?

Answer 3

To reduce physical hardware needs, improve resource utilization, and enable features like Virtual Desktop Infrastructure (VDI) and testing environments.

Question 4

What is containerization?

Answer 4

A form of lightweight virtualization that shares a common OS kernel among containers while isolating their user spaces.

Question 5

What tools are commonly used for containerization?

Answer 5

Docker, Kubernetes, OpenVZ, and similar container orchestration systems.

Question 6

How does containerization differ from virtualization?

Answer 6

Containerization shares the host OS kernel, while virtualization runs separate OS instances on virtual machines.

Question 7

What is hyperconverged infrastructure?

Answer 7

An IT framework that integrates storage, networking, and computing resources into a single system managed by software.

Question 8

What is application virtualization?

Answer 8

Encapsulation of programs from the host OS, enabling legacy or cross-platform applications to run independently.

Question 9

What is emulation?

Answer 9

A process that simulates hardware or software environments to run applications designed for a different architecture.

Question 10

How does emulation differ from virtualization?

Answer 10

Emulation translates between architectures, allowing non-native software to run, but is slower than virtualization.

Question 11

What is a common use case for emulation?

Answer 11

Running software or games designed for different systems, like a Super Nintendo emulator on a PC.

Question 12

What is the primary benefit of VDI (Virtual Desktop Infrastructure)?

Answer 12

It provides isolated, disposable virtual desktops that enhance security and reduce persistence threats.

Question 13

Why are sandboxes important in virtualization?

Answer 13

They create safe environments for malware analysis, training, and testing without risking the host system.

Question 14

What are the benefits of snapshots in virtualization?

Answer 14

Snapshots enable users to save the state of a virtual machine, allowing quick recovery during troubleshooting or testing.

Question 15

What are the security benefits of virtualization?

Answer 15

Virtual machines and containers isolate processes, preventing one compromised instance from affecting others.

Question 16

What is a key advantage of containerization for developers?

Answer 16

Containers allow cross-platform testing and deployment without worrying about OS-specific dependencies.

Question 17

Why is emulation slower than virtualization?

Answer 17

Emulation translates instructions between architectures, which adds computational overhead.

Question 18

How does virtualization optimize IT infrastructure?

Answer 18

By consolidating physical hardware into fewer servers and enabling scalable resource allocation.

Question 19

What is the role of Kubernetes in containerization?

Answer 19

Kubernetes manages containerized workloads, automating deployment, scaling, and monitoring.

Question 20

When should you choose virtualization over containerization?

Answer 20

When full OS isolation or support for multiple operating systems on the same hardware is required.

Question 21

When should you use emulation instead of virtualization?

Answer 21

When running software designed for a completely different hardware architecture.

Question 22

What is the purpose of application virtualization?

Answer 22

To run applications independently from the host OS, enabling legacy software or cross-platform compatibility.