AWS Certified Data Analytics Specialty 2021 - Hands-On! - Amazon DynamoDB Overview

The video tutorial provides an in-depth look at Amazon DynamoDB, a fully managed NoSQL database service. It covers its scalability, performance, and integration with AWS security features. The tutorial explains the basics of DynamoDB, including its structure, primary keys, and data types. It also discusses table design, key selection, and common use cases, highlighting when DynamoDB is most effective and when other solutions might be better suited. The video concludes with a discussion on anti-patterns and best practices for using DynamoDB in big data applications.

What makes DynamoDB a suitable choice for serverless applications?

• It has high latency.

• It is a relational database.

• It requires manual scaling.

• It offers low cost and auto-scaling capabilities.

In DynamoDB, what is the role of a primary key?

• It is only required for relational databases.

• It is used to store binary data.

• It is used for complex transactions.

• It uniquely identifies each item in a table.

What is a partition key in DynamoDB?

• A key that must be unique and diverse for data distribution.

• A key used for sorting data within a partition.

• A key that allows complex joins.

• A key that stores large binary objects.

Why is movie ID a good partition key for a movie database?

• It has low cardinality.

• It is the same for all movies.

• It is not unique.

• It has high cardinality.

Which of the following is a common use case for DynamoDB?

• Low IO operations with large data.

• Mobile apps and gaming.

• Complex transactions with multiple joins.

• Storing large binary objects.

When should you consider using S3 over DynamoDB?

• When dealing with large, cold data.

• When you need high-speed transactions.

• When storing hot and small data.

• When you need auto-scaling capabilities.

What is an anti-pattern for using DynamoDB?

• Using it for complex joins and transactions.

• Using it for metadata storage.

• Using it for mobile apps.

• Using it for real-time voting.