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aws-certified-developer-exam-tips

A list of knowledge areas per AWS service that should be remembered for the AWS Certified Developer - Associate exam

IAM

  • Never use the IAM root account for day-to-day activities
  • Always setup MFA on the IAM root account
  • Use IAM Policy Simulator to test out permission levels
  • Know the usage scope of IAM Managed Policies, Customer Managed Policies and Inline Policies

EC2

  • Have an understanding of which EC2 pricing options to use and when
  • Have an understanding of the different EBS volume types and when to use cases
  • Know the differences between the ELB types
  • Know that you need x-forwarded-for for IP tracking and Sticky Sessions for session management
  • Never store IAM programmatic keys on an EC2 instances or within code

RDS

  • Understand the difference between read-replicas and multi-AZ for RDS
  • Know the difference between Automated Backups and Snapshots in RDS

ElasticCache

  • Know the 2 types of ElastiCache offerings and when to use ElastiCache

Secrets

  • Know the difference between Secrets Manager Parameter Store and Secrets Manager

S3

  • Understand the S3 storage classes and tradeoffs
  • Understand S3 encryption options and how these are implemented
  • Be confident about how to use the x-amz-server-side-encryption parameter with bucket policies and request headers
  • Understand why CORS is important in S3

CloudFront

  • Be familiar with CloudFront Origin, Distribution, Edge Location, and TTL

Lambda

  • Understand Lambda versioning, using Lambda in a VPC, and concurrent execution limits
  • Know the errors returned when Lambda concurrency executions are exhausted

API Gateway

  • Be knowledgeable about API Gateway and the API Types it supports, Caching, and Throttling
  • Know the errors returned when API Gateway is thorttled

X-Ray

  • Be familiar with X-Ray and how it is configured for Lambda, EC2 and Containers (and where)

DynamoDB

  • Know your DynamoDB calculations for RCU and WCU well - practice this repeatedly, it will come up on the exam
  • Know that Eventually Consistent reads are better for read performance and Strongly Consistent reads are better for read consistency
  • Be comfortable choosing a partition key
  • Be comfortable choosing a composite key
  • Know when to use Scan vs Query
  • Know difference between Local Secondary Index and Global Secondary Index
  • Know when to use DynamoDB Accelerator and where to place this in an architecture
  • Know about DynamoDB streams and its use case
  • Be familar with the errors returned when provisioned throughput has exceeded

KMS

  • Understand envelope encryption with KMS
  • Understand CMK usage patterns with KMS

SQS / SNS / SQS

  • Know the difference between long polling and short polling with SQS
  • Know that SQS is pull based and SNS is push based
  • Know the message size limits, maximum days of retention and default days of retention in SQS
  • Know the difference queue types in SQS and what makes them different
  • Understand visibility timeout, the default value, the maxmium value and how it is used in a scenario
  • Understand SQS delay queues
  • Know that SES is a service and when it can be used

Kinesis

  • Know the difference between Kinesis Data Streams, Data Analytics and Data Streams
  • Understand how Shards and Consumers are configured, particularly about the number of record processors

Elastic Beanstalk

  • Understand Elastic Beanstalk and its use case
  • Understand the Elastic Beanstalk deployment options well, along with selecting the best option for a given scenario
  • Know that you can have RDS inside or outside of an Elastic Beanstalk and its tradeoffs

CI/CD

  • Understand when to use CodeCommit, CodeBuild, CodeDeploy and CodePipeline
  • Know the deployment options of CodePipeline
  • Understand the CodeDeploy Lifecycle Event Hooks well

ECS / ECR

  • Understand ECS and its advantages offered
  • Know the basics of ECR and how to build, tag and push docker images to ECR
  • Know how to deploy Docker using Elastic Beanstalk

CloudFormation

  • Be comfortable with CloudFormation, the template structure and Nested Stacks
  • Understand how CloudFormation and SAM work together

Cognito

  • Understand how to apply User Pools and Identity Pools to scenarios using Cognito

CloudWatch

  • Understand the basics of CloudWatch, the default metrics and intervals, Custom Metrics and options available
  • Know the difference between CloudWatch and CloudTrail