Section 5: EC2 Fundamentals

Question 1

Which OS does EC2 support?

Answer 1

Linux, Window, Mac

Question 2

What is bootstrapping?

Answer 2

Launching one-time commands when the machine starts

Question 3

Can you attach a security group to multiple EC2 instances?

Answer 3

Yes

Question 4

Can you attach a security group to an EC2 instance in a different region?

Answer 4

No

Question 5

What is port 22 for?

Answer 5

SSH (Secure Shell) - logging into a linux instance
SFTP (Secure File Transfer protocol

Question 6

What is port 21 for?

Answer 6

FTP (File Transfer Protocol)

Question 7

What is port 80 for?

Answer 7

HTTP - access to unsecured websites

Question 8

What is port 443 for?

Answer 8

HTTPS - access to secure websites

Question 9

Which port is for RDP (remote desktop protocol)?

Answer 9

3389

Question 10

Which EC2 instance purchasing option allows you to launch instances without any upfront payment and pay for compute capacity by the second?

Answer 10

On-Demand Instances

Question 11

Which EC2 instance purchasing option provides the highest discount, but requires a 1- or 3-year commitment?

Answer 11

Reserved Instances

Question 12

Which EC2 instance purchasing option is best suited for applications with steady-state or predictable usage patterns?

Answer 12

Reserved Instances

Question 13

Which EC2 instance purchasing option provides the ability to bid on unused EC2 capacity, allowing you to potentially lower your costs for running applications?

Answer 13

Spot Instances

Question 14

Which EC2 instance purchasing option is recommended for short-term, spiky, or unpredictable workloads?

Answer 14

Spot Instances

Question 15

What controls traffic in and out of EC2 instances?

Answer 15

Security Groups

Question 16

How long can you reserve an EC2 instance?

Answer 16

1 to 3 years