ELASTIC COMPUTE CLOUD (EC2) BASICS

Question 1

Technology that you can use to create virtual representations of servers, storage, networks, and other physical machines. Software mimics the functions of physical hardware to run multiple virtual machines simultaneously on a single physical machine

Answer 1

Virtualization

Question 2

Technique is fast and provides near-native speed in comparison to full virtualization but requires modifications to the OS to allow the hypervisor to export a modified version of the underlying hardware to the VMs.

Answer 2

Paravirtualization

Question 3

The underlying hardware provides special CPU instructions to aid virtualization

Answer 3

Hardware-assisted Virtualization

Question 4

Hardware standard that allows a PCI Express device – typically a network interface card (NIC) – to present itself as several virtual NICs to a hypervisor

Answer 4

Single Root I/O Virtualization (SR-IOV)

Question 5

limited to running On-Demand Instances per your vCPU-based On-Demand Instance limit

Answer 5

True

Question 6

Runs on shared hosts or dedicated hosts

Answer 6

True

Question 7

If the AZ fails, the host fails, and the instances fail within the AZ

Answer 7

True

Question 8

Does EC2 run in a single AZ

Answer 8

Yes

Question 9

Is the Instance Store on an EC2 temporary?

Answer 9

Yes

Question 10

Can you connect network interfaces or EBS storage in one AZ to an EC2 instance in another AZ?

Answer 10

No

Question 11

Used for Traditional OS+Application Compute

Answer 11

True

Question 12

Used for Long-Running Compute

Answer 12

True

Question 13

Used for Server Style Applications

Answer 13

True

Question 14

Used for Applications that require Burst or steady-state load

Answer 14

True

Question 15

Used for monotlithic application stacks

Answer 15

True

Question 16

used for migrated application workloads or disaster recovery

Answer 16

True

Question 17

supported and maintained image provided by AWS that provides the information required to launch an instance

Answer 17

AMI

Question 18

Can AMI work in a different region that is created in?

Answer 18

No

Question 19

Creating an AMI from a configured instance + application

Answer 19

AMI Baking

Question 20

Can an AMI be edited after created?

Answer 20

No

Question 21

Can an AMI be copied between regions

Answer 21

Yes

Question 22

scaling where you are adding more servers to the system. More servers mean that workload is distributed to a greater number of workers, which thereby reduces the burden on each server

Answer 22

Horizontal Scaling

Question 23

Refers to increasing or decreasing the resources of a single server, instead of adding new servers to the system suited for resources that are stateful or have operations difficult to manage in a distributed manner

Answer 23

Vertical Scaling

Question 24

Externally hosted session data for instances

Answer 24

Off-host sessions