EC2

Question 1

What are the principles behind the AWS philosophy on pricing?

Answer 1

a. pay as you go
b. pay for what you use
c. pay less as you use more
d. pay even less when you reserve capacity

Question 2

What are the available EC2 pricing models

Answer 2

a. On Demand
b. Reserved
c. Spot
d. Dedicated Hosts

Question 3

When is On Demand pricing appropriate

Answer 3

a. desire for low cost and flexibility without upfront costs or long-term commitment
b. applications are short-term, spiky, or have unpredictable workloads that cannot be interrupted
c. applications being tested for the first time

Question 4

When is Reserved pricing model appropriate

Answer 4

a. applications are steady state and have predictable usage
b. applications require reserved capacity
c. able to make upfront payment to reduce TCO

Question 5

What are the available Reserved pricing models

Answer 5

a. Standard Reserved
b. Convertible Reserved
c. Scheduled

Question 6

When is Spot pricing model appropriate

Answer 6

a. applications have flexible start & end times
b. applications are only feasible at very low compute prices
c. urgent and large amounts of additional computing capacity are needed

Question 7

When is Dedicated Hosting pricing appropriate

Answer 7

a. restrictions due to regulatory requirements such as multi-tenant virtualization
b. licensing restrictions that don’t support multi-tenancy or cloud deployments

Question 8

What are the purchase options for Dedicated Hosting

Answer 8

a. desire hourly on-demand hosting

b. reserved at a discounted price

Question 9

What is EC2

Answer 9

a. host virtualization in the cloud

Question 10

How is Spot pricing calculated for EC2

Answer 10

a. terminated by customer - charged for the full hour

b. terminated by AWS - charged for partial hour

Question 11

The default setting for Termination Protection on an EC2 instance is

Answer 11

turned off

Question 12

On an EBS-backend instance, the default action for the root EBS volume to ____ when the instance is terminated.

Answer 12

be deleted

Question 13

The Root Volumes of your DEFAULT AMI can/can not be encrypted.

Answer 13

can not, but it can be encrypted later

Question 14

Which volumes of and EC2 instance can be encrypted

Answer 14

root; but only after up an running
EBS volumes at instantiation
Other additional volumes at instantiation

Question 15

Changes to security groups take effect

Answer 15

immediately

Question 16

Security Group rules are stateful/stateless

Answer 16

stateful

Question 17

To allow a port or ip for communication with an EC2 instance, use___
To block a port or ip for communication with an EC2 instance, use ___

Answer 17

Security groups

Network Access Control Lists (NACLs)

Question 18

For EC2 instances, by default, all inbound traffic is

Answer 18

blocked

Question 19

For EC2 instances, by default, all outbound traffic is

Answer 19

allowed

Question 20

What is EBS

Answer 20

Elastic Block Store, a virtual HDD

Question 21

What media types of EBS are available

Answer 21

General Purpose (SSD)
Provisioned IOPS (SSD)
Throughput optimized HDD
Cold HDD
Magnetic

Question 22

What are the use cases for

a. GP SSD
b. Provisioned IOPS SSD
c. Throughput Optimized HDD
d. Cold HDD
e. EBS Magnetic

Answer 22

a. Most Work Loads: balances price and performance for transactional workloads
b. Databases: highest performance for mission critical apps
c. Big Data & Data Warehouses: low cost, frequently accessed, throughput intensive
d. File Servers: Lowest cost
e. Workloads with Infrequent Access: previous generation

Question 23

in terms of location, what is the relationship between an EC2 instance and Volume location?

Answer 23

they are the same

Question 24

When terminating an EC2 instance, the EBS volumes will

Answer 24

persist

Question 25

Where do snapshots get stored

Answer 25

in S3

Question 26

Snapshots are full or incremental

Answer 26

incremental

Question 27

AMIs can be created from ________ and ________

Answer 27

Volumes

Snapshots