Databases

Question 1

What are Relational Databases?

Answer 1

RDS is only for relational databases.

Don’t forget the supported database engines:

Amazon Aurora

PostgreSQL

My SQL

MariaDB

Oracle Database

SQL Server.

Question 2

What is an Aurora database?

Answer 2

Only supports PostgreSQL and My SQL (faster and cheaper).

Managed by RDS. *created by AWS

Question 3

What is DynamoDB?

Answer 3

A No SQL database

Fully managed and serverless (meaning the patching and upgrading is done by AWS)

Fast enough to handle millions of request per second

Question 4

What is ElastiCache?

Answer 4

An in-memory datastore

Fully managed in-memory datastore

Compatible with Redis and Memcached

Data can be lost

Question 5

What is Neptune?

Answer 5

A graph database

Helps you create social media graphs

Good for highly connected dataset like social media networks

Question 6

What is DocumentDB?

Answer 6

A graph database.

Supports MongoDB

Fully managed and serverless

Non-relational

Question 7

What is some real world use cases of Aurora database?

Answer 7

RDS- migrate a on-prem Oracle database to the cloud

RDS & Aurora – migrate an on-prem PostgreSQL database to the cloud

Question 8

What are some real world use cases of ElastiCache?

Answer 8

ElastiCache - Alleviate database load for data that is accessed often

Question 9

What are some real world use cases of Neptune?

Answer 9

Neptune - Process large sets of user profiles and social interactions

Document Databases