AWS AWS Database Services

Question 1

When should you choose Amazon DynamoDB over Amazon RDS?

Accepted Answer

For applications needing single-digit millisecond latency at any scale with flexible schema

Answer

For applications requiring complex SQL joins

Answer

For traditional relational workloads with ACID transactions

Answer

Only for static website hosting

Question 2

What is Amazon Aurora and how does it differ from standard RDS?

Accepted Answer

A MySQL/PostgreSQL-compatible database with up to 5x and 3x better performance respectively and automatic storage scaling

Answer

A data warehouse service

Answer

A caching service similar to ElastiCache

Answer

An in-memory database only

Question 3

What is Amazon ElastiCache and when should it be used?

Accepted Answer

A managed in-memory caching service (Redis or Memcached) for reducing database load and improving latency

Answer

A service for caching S3 objects on disk

Answer

A CDN for API responses

Answer

A database backup service

Question 4

What is Amazon Redshift used for?

Accepted Answer

A fully managed data warehouse for analyzing large datasets using SQL

Answer

A tool for shifting data between regions

Answer

A service for real-time transaction processing

Answer

A NoSQL database for document storage

Question 5

What is Amazon DocumentDB?

Accepted Answer

A managed document database service compatible with MongoDB workloads

Answer

A service for storing PDF documents

Answer

A text editor in the cloud

Answer

An OCR scanning service

Question 6

What is the purpose of Amazon DynamoDB Streams?

Accepted Answer

To capture time-ordered sequences of item-level changes in a DynamoDB table for event-driven processing

Answer

To stream video content from DynamoDB

Answer

To migrate data between DynamoDB tables

Answer

To visualize DynamoDB table structure