Virtualization

Question 1

What is the goal of virtualization?

Answer 1

To isolate applications while still sharing resources

Question 2

What is the benefit of virtualization?

Answer 2

Lower Deployment costs

Question 3

What are normally used for resource sharing

Answer 3

CPU
Memory
Disk Storage
Network Connections

Question 4

What is another name for the hypervisor?

Answer 4

The bare metal / type 1 hypervisor

Question 5

What is the type 2 hypervisor?

Answer 5

Type 2 hypervisor which runs as a service on top of a
host OS.

Question 6

What is a VM image?

Answer 6

the contents of the disk storage from
which we boot a VM a VM image.

Question 7

What are two main functions of the hypervisor?

Answer 7

1. It manages the code running in each VM, and
2. it manages the VMs themselves.
   Code that communicates outside the VM by accessing
   a virtualized disk or network interface is intercepted by
   the hypervisor and executed by the hypervisor on
   behalf of the VM.

Question 8

What are some concerns of the hypervisor?

Answer 8

Performance. Virtualization incurs a performance cost.
– Separation of concerns. Virtualization allows an
architect to treat runtime resources as commodities,
deferring provisioning and deployment decisions to
another person or organization.

Question 9

What are some concerns of the VMs?

Answer 9

Performance. Virtualization incurs a performance cost.
– Separation of concerns. Virtualization allows an
architect to treat runtime resources as commodities,
deferring provisioning and deployment decisions to
another person or organization.

Question 10

What is configuration?

Answer 10

This is the process of adding on services to virtual images that only consist of the operating system and the

Question 11

How are containers transferred?

Answer 11

• Like VMs and VM images, containers are
  packaged into executable container images for
  transfer.

Question 12

Where do containers operate?

Answer 12

Containers operate under the control of a container
runtime engine, which runs on top of a fixed OS.

Question 13

How are containers allocated?

Answer 13

Containers are allocated by finding a container runtime engine that has sufficient unused
resources to support an additional container.

Question 14

What are the differences between a container and a VM?

Question 15

What is kubernetes?

Answer 15

Kubernetes is orchestration software for deploying,
managing, and scaling containers.

Question 16

What is kubernetes?

Answer 16

Kubernetes is orchestration software for deploying,
managing, and scaling containers.

Question 17

How are containers allocated in serverless architecture?

Answer 17

Containers are allocated dynamically with
each service request. And they are cached, to
improve performance (after initial load).
These containers are typically stateless.