EC2

Question 1

EC2 Pricing Types (other than Free)

Answer 1

On-Demand
Spot
Savings Plans
Reserved Instances
Dedicated Hosts

Question 2

On-Demand Instance

Answer 2

Pay per second or hour. ‘Normal’ pricing

Question 3

Spot Instances

Answer 3

Spare computing capacity. Save up to 90% from On-Demand

Question 4

Reserved Instances

Answer 4

Up to 75% Off On-Demand
Commit to 1 or 3 year terms
Can be ‘Convertible’
Discount (L -> H): No Upfront, Partial , All

Question 5

Dedicated Host

Answer 5

Physical EC2 Host

Pay via On-Demand (Hr) Or Reserved ( <= 70%)

Question 6

Convertible Reserved

Answer 6

Allow flexibility to change instance types (equal or greater value)
Discount (L -> H): No Upfront, Partial , All

Question 7

Reserved vs Convertible Instance Price Hierarchy (Lowest to highest discount)

Answer 7

Discount (L -> H): Con-1 -> Stan-1 -> Con-3 -> Stan-3

Question 8

EBS

Answer 8

SSD Backed / HDD Backed

Elastic Block Storage

Virtual Disk

Persistent across instances

Question 9

Security Groups

Answer 9

Apply to EC2 instances

Port
Protocol
Source:
- IP Range
- Security Group

Question 10

ACL vs Security Group

Answer 10

ACL = Subnet level / in the VPC

SecurityGroup = Apply to EC2 Instances