Book Image

AWS Certified Database – Specialty (DBS-C01) Certification Guide

By : Kate Gawron
5 (1)
Book Image

AWS Certified Database – Specialty (DBS-C01) Certification Guide

5 (1)
By: Kate Gawron

Overview of this book

The AWS Certified Database – Specialty certification is one of the most challenging AWS certifications. It validates your comprehensive understanding of databases, including the concepts of design, migration, deployment, access, maintenance, automation, monitoring, security, and troubleshooting. With this guide, you'll understand how to use various AWS databases, such as Aurora Serverless and Global Database, and even services such as Redshift and Neptune. You’ll start with an introduction to the AWS databases, and then delve into workload-specific database design. As you advance through the chapters, you'll learn about migrating and deploying the databases, along with database security techniques such as encryption, auditing, and access controls. This AWS book will also cover monitoring, troubleshooting, and disaster recovery techniques, before testing all the knowledge you've gained throughout the book with the help of mock tests. By the end of this book, you'll have covered everything you need to pass the DBS-C01 AWS certification exam and have a handy, on-the-job desk reference guide.
Table of Contents (24 chapters)
1
Part 1: Introduction to Databases on AWS
Free Chapter
2
Chapter 1: AWS Certified Database – Specialty Overview
5
Part 2: Workload-Specific Database Design
12
Part 3: Deployment and Migration and Database Security
16
Part 4: Monitoring and Optimization
20
Part 5: Assessment
21
Chapter 16: Exam Practice

Chapter 6

  1. 4

TTL will only help if it can remove older records; therefore, this won't immediately help and is incorrect.

DAX may improve performance but it is not the most cost-efficient option.

DynamoDB Streams will not help any performance issue.

Autoscaling is the correct answer, as the issue is a restriction of provisioned capacity units.

  1. 1

An item is 3 KB, so you need one RCU per two items in eventually consistent mode, and three WCUs per item as standard write. This gives you 50 RCUs and 30 WCUs.

  1. 4

25 GB is provided free for each account when using DynamoDB.

  1. 2

An LSI can only be provisioned when the table is created.

A GSI can contain different keys to the base table.

  1. 3

This error is seen when using DAX and not when using DynamoDB, so autoscaling won't help.

This error is seen when using DAX and not when using DynamoDB, so on-demand won't help.

This is a DAX throttling error...