EC2

Question 1

What does EC2 stand for?

Answer 1

Elastic Compute Cloud

Question 2

What are the 4 EC2 pricing options?

Answer 2

On Demand, Reserved, Spot, Dedicated

Question 3

What are the length options for a reserved EC2 instance?

Answer 3

1 or 3 years

Question 4

What is the spot EC2 instance pricing?

Answer 4

There is no set pricing as it fluctuates with supply and demand

Question 5

What is the most expensive EC2 option?

Answer 5

Dedicated

Question 6

What are the benefits of On Demand EC2 pricing?

Answer 6

Flexible, which makes it good for unpredictable markets or for functioning for an unknown length of time

Question 7

When would you use reserved instances?

Answer 7

When there is predictable usage or specific capacity requirements

Question 8

What are the types of reserved instances?

Answer 8

Standards, Convertible, and Scheduled

Question 9

Are reserved instances geographically defined?

Answer 9

Yes, they are reserved in a specific region

Question 10

What applications should be run on spot instances?

Answer 10

Flexible start and end times

Question 11

What are some common use cases for dedicated hosts?

Answer 11

Regulatory requirements that may not support multi-tenant virtualization or licensing that does not support multi-tenancy

Question 12

What are the 3 types of EC2 placement groups?

Answer 12

Cluster, spread, and partition

Question 13

What is a cluster group placement?

Answer 13

Grouping of instances within a single availability zone

Question 14

What are cluster placement groups recommended for?

Answer 14

applications that need low network latency, high network throughput, or both

Question 15

What is a spread placement group?

Answer 15

A group of instances that are each placed on distinct underlying hardware

Question 16

What are spread placement groups recommended for?

Answer 16

Applications that have a small number of critical instances that should be kept separate from each other

Question 17

What is a partition placement group?

Answer 17

A partition placement group puts each instance on its own rack. (Each rack has its own network and power source)

Question 18

What EC2 pricing option should you use to fulfill special licensing requirements?

Answer 18

Dedicated Host

Question 19

When is a spot instance provisioned?

Answer 19

When it is below your max spot price

Question 20

What is a spot block?

Answer 20

Stops your spot instance from being terminated even if it goes above your spot max price for between 1 and 6 hours

Question 21

On what time interval are spot instance prices determined?

Answer 21

1 hour

Question 22

What are some examples of work that spot instances would suit well?

Answer 22

1. Big data and analytics
2. Containerized workloads
3. CI/CD and testing
4. Image and media rendering
5. High performance computing

Question 23

What are spot instances not suited for?

Answer 23

Persistent workloads like a database or critical workloads

Question 24

How do you terminate a spot instance that is persistent?

Answer 24

First, you have to cancel the request, then terminate the instance

Question 25

What is a spot fleet?

Answer 25

A spot fleet attempts to launch the number of spot instances and (optionally) On-Damand instances to meet the target capacity you specified in the Spot Fleet request.

Question 26

What condition effects whether a spot fleet is fulfilled or not?

Answer 26

Whether the maximum price you specified in the request exceeds the current Spot price

Question 27

What are the potential strategies for a spot fleet?

Answer 27

capacityOptimized, lowestPrice, diversified, InstancePoolsToUseCount (must be used in combination with lowestPrice)

Question 28

What are the use cases for VMware?

Answer 28

Connecting private cloud to AWS public cloud, cloud migration, disaster recovery

Question 29

How do you deploy vCenter?

Answer 29

Using VMware on the AWS cloud

Question 30

What is AWS Outposts?

Answer 30

Outposts allows you to have a large variety of AWS services in your data center

Question 31

Who manages AWS Outposts infrastructure?

Answer 31

AWS

Question 32

What are the two options of AWS Outposts?

Answer 32

Outposts Rack and Outposts Servers

Question 33

What can you save up to with spot instances?

Answer 33

90 percent

Question 34

What can you save up to with reserved instances?

Answer 34

72 percent

Question 35

What happens when you start an EC2 instance?

Answer 35

Operating systems boots up, user data script is run (bootstrap scripts), applications start

Question 36

What is hibernation also called?

Answer 36

Suspsend to disk

Question 37

What does EC2 hibernation do?

Answer 37

Saves the contents from the instance memory (RAM) to EBS root volume. EBS root volumes and any attached EBS data volumes persist

Question 38

What is the benefit of EC2 hibernation over stopping the instance?

Answer 38

The instance boots much faster because the OS doesn't have to reboot

Question 39

What are some examples where EC2 hibernation would be useful?

Answer 39

Services that take time to initialize

Question 40

How long can you hibernate an instance for?

Answer 40

up to 60 days

Question 41

What is a launch template?

Answer 41

Specifies all of the needed settings that go into building out an EC2 instance

Question 42

What is the difference between a launch template and configurations?

Answer 42

Launch configurations have more limitations than templates such as can only be used for autoscaling, they are immutable, etc

Question 43

What is an auto scaling group?

Answer 43

A collection of instances that are treated as a collective group for purposes of scaling and management

Question 44

what is the recommended minimum amount of instances in an autoscaling group?

Answer 44

2

Question 45

What are the 3 important settings to set on an autoscaling group?

Answer 45

min instances, max instances, desired instances

Question 46

What are the corresponding services to the 3 W's?

Answer 46

What: launch templates, Where: autoscaling groups, When: scaling policies

Question 47

Should you scale in aggressively and scale out conservatively?

Answer 47

No, the opposite, takes more time to scale out than in

Question 48

What payment type of EC2 instance is best for fulfilling the minimum count of EC2 instances in an autoscaling group?

Answer 48

Reserved instances