AWS Certified Developer Associate (DVA-C02)
Articles covering AWS Certified Developer Associate (DVA-C02) exam task statements. These guides focus on AWS application development, architectural patterns, system design principles, fault-tolerant patterns, programming languages, API development, testing strategies, and AWS service integration topics essential for your AWS Developer Associate certification.
DVA-C02 Task Statement 1.1: Develop Code for Applications Hosted on AWS
Comprehensive guide to developing code for applications hosted on AWS including architectural patterns (event-driven, microservices, monolithic, choreography, orchestration, fanout), idempotency, differences between stateful and stateless concepts, differences between tightly coupled and loosely coupled components, fault-tolerant design patterns (retries with exponential backoff and jitter, dead-letter queues), differences between synchronous and asynchronous patterns, creating fault-tolerant and resilient applications in programming languages (Java, C#, Python, JavaScript, TypeScript, Go), creating, extending, and maintaining APIs (response/request transformations, enforcing validation rules, overriding status codes), writing and running unit tests in development environments (using AWS Serverless Application Model), writing code to use messaging services, writing code that interacts with AWS services by using APIs and AWS SDKs, and handling data streaming by using AWS services in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 1.2: Develop Code for AWS Lambda
Comprehensive guide to developing code for AWS Lambda including event source mapping, stateless applications, unit testing, event-driven architecture, scalability, the access of private resources in VPCs from Lambda code, configuring Lambda functions by defining environment variables and parameters (memory, concurrency, timeout, runtime, handler, layers, extensions, triggers, destinations), handling the event lifecycle and errors by using code (Lambda Destinations, dead-letter queues), writing and running test code by using AWS services and tools, integrating Lambda functions with AWS services, and tuning Lambda functions for optimal performance in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 1.3: Use Data Stores in Application Development
Comprehensive guide to using data stores in application development including relational and non-relational databases, create, read, update, and delete (CRUD) operations, high-cardinality partition keys for balanced partition access, cloud storage options (file, object, databases), database consistency models (strongly consistent, eventually consistent), differences between query and scan operations, Amazon DynamoDB keys and indexing, caching strategies (write-through, read-through, lazy loading, TTL), Amazon Simple Storage Service (Amazon S3) tiers and lifecycle management, differences between ephemeral and persistent data storage patterns, serializing and deserializing data to provide persistence to a data store, using, managing, and maintaining data stores, managing data lifecycles, and using data caching services in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 2.1: Implement Authentication and/or Authorization for Applications and AWS Services
Comprehensive guide to implementing authentication and/or authorization for applications and AWS services including identity federation (SAML, OpenID Connect, Amazon Cognito), bearer tokens (JSON Web Token, OAuth, AWS Security Token Service), the comparison of user pools and identity pools in Amazon Cognito, resource-based policies, service policies, and principal policies, role-based access control (RBAC), application authorization that uses ACLs, the principle of least privilege, differences between AWS managed policies and customer-managed policies, identity and access management, using an identity provider to implement federated access (Amazon Cognito, AWS Identity and Access Management), securing applications by using bearer tokens, configuring programmatic access to AWS, making authenticated calls to AWS services, assuming an IAM role, and defining permissions for principals in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 2.2: Implement Encryption by Using AWS Services
Comprehensive guide to implementing encryption by using AWS services including encryption at rest and in transit, certificate management (AWS Private Certificate Authority), key protection (key rotation), differences between client-side encryption and server-side encryption, differences between AWS managed and customer managed AWS Key Management Service (AWS KMS) keys, using encryption keys to encrypt or decrypt data, generating certificates and SSH keys for development purposes, using encryption across account boundaries, and enabling and disabling key rotation in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 2.3: Manage Sensitive Data in Application Code
Comprehensive guide to managing sensitive data in application code including data classification (personally identifiable information [PII], protected health information [PHI]), environment variables, secrets management (AWS Secrets Manager, AWS Systems Manager Parameter Store), secure credential handling, encrypting environment variables that contain sensitive data, using secret management services to secure sensitive data, and sanitizing sensitive data in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 3.1: Prepare Application Artifacts to be Deployed to AWS
Comprehensive guide to preparing application artifacts to be deployed to AWS including ways to access application configuration data (AWS AppConfig, Secrets Manager, Parameter Store), Lambda deployment packaging, layers, and configuration options, Git-based version control tools (Git), container images, managing the dependencies of the code module (environment variables, configuration files, container images) within the package, organizing files and a directory structure for application deployment, using code repositories in deployment environments, and applying application requirements for resources (memory, cores) in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 3.2: Test Applications in Development Environments
Comprehensive guide to testing applications in development environments including features in AWS services that perform application deployment, integration testing that uses mock endpoints, Lambda versions and aliases, testing deployed code by using AWS services and tools, performing mock integration for APIs and resolving integration dependencies, testing applications by using development endpoints (configuring stages in Amazon API Gateway), and deploying application stack updates to existing environments (deploying an AWS SAM template to a different staging environment) in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 3.3: Automate Deployment Testing
Comprehensive guide to automating deployment testing including API Gateway stages, branches and actions in the continuous integration and continuous delivery (CI/CD) workflow, automated software testing (unit testing, mock testing), creating application test events (JSON payloads for testing Lambda, API Gateway, AWS SAM resources), deploying API resources to various environments, creating application environments that use approved versions for integration testing (Lambda aliases, container image tags, AWS Amplify branches, AWS Copilot environments), implementing and deploying infrastructure as code (IaC) templates (AWS SAM templates, AWS CloudFormation templates), and managing environments in individual AWS services (differentiating between development, test, and production in API Gateway) in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 3.4: Deploy Code by Using AWS CI/CD Services
Comprehensive guide to deploying code by using AWS CI/CD services including Git-based version control tools (Git), manual and automated approvals in AWS CodePipeline, access application configurations from AWS AppConfig and Secrets Manager, CI/CD workflows that use AWS services, application deployment using AWS services and tools (CloudFormation, AWS CDK, AWS SAM, AWS CodeArtifact, AWS Copilot, Amplify, Lambda), Lambda deployment packaging options, API Gateway stages and custom domains, deployment strategies (canary, blue/green, rolling), updating existing IaC templates, managing application environments, deploying application versions, committing code to repositories, using orchestrated workflows, performing application rollbacks, using labels and branches for version management, and using existing runtime configurations for dynamic deployments in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 4.1: Assist in a Root Cause Analysis
Comprehensive guide to assisting in root cause analysis including logging and monitoring systems, languages for log queries (Amazon CloudWatch Logs Insights), data visualizations, code analysis tools, common HTTP error codes, common exceptions generated by SDKs, service maps in AWS X-Ray, debugging code to identify defects, interpreting application metrics, logs, and traces, querying logs to find relevant data, implementing custom metrics (CloudWatch embedded metric format [EMF]), reviewing application health by using dashboards and insights, and troubleshooting deployment failures by using service output logs in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 4.2: Instrument Code for Observability
Comprehensive guide to instrumenting code for observability including distributed tracing, differences between logging, monitoring, and observability, structured logging, application metrics (custom, embedded, built-in), implementing an effective logging strategy to record application behavior and state, implementing code that emits custom metrics, adding annotations for tracing services, implementing notification alerts for specific actions (notifications about quota limits or deployment completions), and implementing tracing by using AWS services and tools in AWS Certified Developer Associate exam preparation.
2025-09-25
DVA-C02 Task Statement 4.3: Optimize Applications by Using AWS Services and Features
Comprehensive guide to optimizing applications by using AWS services and features including caching, concurrency, messaging services (Amazon Simple Queue Service [Amazon SQS], Amazon Simple Notification Service [Amazon SNS]), profiling application performance, determining minimum memory and compute power for an application, using subscription filter policies to optimize messaging, and caching content based on request headers in AWS Certified Developer Associate exam preparation.
2025-09-25