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The AWS Certified Developer Associate exam is one of the three associate-level certifications offered by Amazon Web Services. It helps the candidates to demonstrate their

Understanding of core AWS services, their uses, and basic AWS architecture best practices
Proficiency in development, deployment, and debugging cloud-based applications using AWS

Preparation for the AWS Certified Developer Associate Exam

My main preparation resource for the AWS developer associate certification exam was the Whizlabs AWS CDA online course that provides a focused content to pass the AWS CDA exam in the first attempt. The course provides 15+ hours of training videos with few interactive labs along with hands-on practice labs to gain real-time experience.

I completed the online course for the AWS developer associate certification exam that covers a comprehensive set of videos under the following sections:

Introduction
Getting Started
Core Services
Command Line Interface
Serverless
CI/CD and Developer Tools
Security
Additional Key Services

After the completion of the online video course, I also tried Whizlabs AWS CDA practice tests to check if Iâ€™m well-prepared. I tried practice tests 2 times, scored 80% above in the first attempt while 90% above in the second attempt and so in the real exam.

Most important Concepts and Topics for the AWS CDA Exam

As I found myself well-prepared for the AWS Certified Developer Associate exam, I scheduled the exam for March 24, 2019. Now, Iâ€™m an AWS Certified Developer Associate, Iâ€™d share my experience of taking the AWS CDA exam with you all. So, here is a description of the important topics and subtopics from which I found the questions in the exam.

1. Serverless

Lambda â€" Many questions were asked from this
A lot of questions were either directly on Lambda or combination of Lambda with other services

â€" Lambda â€" Version-related questions

â€" Lambda â€" Alias-related questions

â€" Lambda â€" SAM-combination questions

â€" Lambda â€" SAM and CodeDeploy combination

SAM â€" Parameters in SAM code related questions â€" Which parameter does what in the YAML code
Lambda for solving Complex architecture

2. KMS

Encryption at rest, Encryption in transit
KMS Questions are asked in combination with a lot of other services
S3 Encryption

â€" Encryption while Transferring data from Kinesis

â€" Lambda function to process data and encryption before transferring data to S3

â€" Default S3 Encryption

Keys related questions â€" Master Key, Envelope key, Data Key, GeneratedDataKey, etc

3. DynamoDB

Complete understanding of DynamoDB is a must for Developer exam
Understanding RCU, WCU and Calculations based on this
Local secondary index, Global secondary index
Scan vs Query
Projection expression
DAX
Using DynamoDB in combination with ElastiCache like Redis and Memcached
DynamoDB combination with Lambda and S3
DynamoDB session related questions
Fetching data from DynamoDB â€" Lazy loading, Write Through
How to solve ProvisionedThroughputExceededException
DynamoDB TTL

4. ElasticBeanstalk

Understanding of different ways of the update is needed â€" rolling, all at once, rolling with batch, immutable, etc
Combination of CloudFormation and ElasticBeanstalk
Understanding clearly how configuration in ElasticBeanstalk works
How to change the Instance type
How RDS can be saved while deleting ElasticBeanstalk
Deploying different versions of the application in ElasticBeanstalk

5. CloudFormation

This is also one of the important topics
Understating parameters inside Cloudformation Template
CloudFormation template stored in S3
CloudFormation, Lambda, CodeDeploy, S3 combination Question
Pointing to the right version of the Lambda function in CloudFormation

6. CodDeploy, CodeBuild, CodeCommit, Code Pipeline

Complete understanding of Code Deploy Configuration file and its parameters â€" appspec file
CodeDeploy errors and reverting back to previous versions
Run order of hooks
CodeBuild in combination with SAM
Understanding CodeBuild Configuration file and its parameters â€" Buildspec file
CodeCommit â€" Even though there were not many direct questions on this, I saw it in many options
Using Codepipeline to automate the process
Errors handling in Codepipeline and what happens when one of the processes fails in Codepipeline