EC2

Question 1

EC2 = ?

Answer 1

Elastic Compute Cloud

Question 2

True/False EC2 is an example of Platform As A Service

Answer 2

False

Question 3

True/False EC2 is an example of Infrastructure As A Service

Answer 3

True

Question 4

What are some types of services EC2 is capable of?

Answer 4

Renting virtual machines (EC2)
Storing data on virtual drives (EBS)
Distributing load across machines (ELB)
Scaling services using an auto-scaling group (ASG)

Question 5

What does bootstrapping mean?

Answer 5

bootstrapping means running commands when a machine starts

Question 6

What is EC2 user data used to automate?

Answer 6

installing updates & software, downloading common files from the internet, etc

Question 7

What is the EC2 naming convention given the example: m5.2xlarge

Answer 7

m: instance class
5: generation (AWS improves them over time)
2xlarge: size within the instance class

Question 8

Describe a general purpose EC2 instance

Answer 8

provides a balance of compute, memory and networking resources, and can be used for a variety of workloads

Question 9

What are general purpose EC2 instances ideal for?

Answer 9

applications that use these compute, memory, and networking resources in equal proportions such as web servers and code repositories

Question 10

What are compute optimized EC2 instances used for?

Answer 10

ideal for compute bound applications that benefit from high performance processors

Question 11

What type of jobs require compute optimized instances?

Answer 11

batch processing workloads, media transcoding, high performance web servers, high performance computing (HPC), scientific modeling, dedicated gaming servers, ad server engines, machine learning inferences, compute intensive applications

Question 12

Describe a memory optimized EC2 instance

Answer 12

designed to deliver fast performance for workloads that process large data sets in memory

Question 13

Describe a storage optimized EC2 instance

Answer 13

designed for workoads that require high, sequential read and write access to very large data sets on local storage

Question 14

What are some use cases for storage optimized EC2 instances?

Answer 14

high frequency online transaction processing (OLTP) systems, relational & NoSQL databases. cache for in-memory databases, distributed file systems

Question 15

What are some use cases for memory optimized EC2 instances?

Answer 15

high performance, relational/non-relational databases, distributed web scale cache stores, in-memory databases optimized for BI (business intelligence), applications performing real-time processing of big unstructured data

Question 16

What do security groups control?

Answer 16

how trafffic is allowed into or out of EC2 instances

Question 17

True/False Security groups only contain allow rules

Answer 17

True

Question 18

How do security group rules reference by?

Answer 18

by IP address or security group

Question 19

How do security groups act on EC2 instances?

Answer 19

as a firewall

Question 20

What do security groups regulate?

Answer 20

access to ports, authorised IP ranges (IPv4 & IPv6), control of inbound networks, control of outbound network

Question 21

True/False Security groups can only be attached to one instance

Answer 21

False, they can be attached to multiple instances