[NEW] AWS Certified Developer – Associate

Detailed Exam Domain CoverageDevelopment with AWS Services (32%)Security (26%)Deployment (24%)Troubleshooting and Optimization (18%)DescriptionI have carefully designed these practice tests to mirror the actual AWS Certified Developer - Associate (DVA-C02) exam environment. If you are looking to validate your ability to develop, test, deploy, and debug AWS cloud-based applications, this question bank is exactly what you need. I created this comprehensive set of questions to ensure you deeply understand core AWS services, security protocols, deployment strategies, and troubleshooting techniques.Instead of just memorizing facts, you will face scenario-based questions that test your practical knowledge of the AWS ecosystem. Every single question comes with a detailed explanation that breaks down why the correct answer is right and why the incorrect options fall short. This methodology ensures you learn the core concepts and the reasoning behind them, giving you the confidence to tackle the real exam. I focused heavily on the core domains so you can spot your weak areas and optimize your study time efficiently.Practice Questions PreviewQuestion 1: A developer is building a serverless application using AWS Lambda and Amazon DynamoDB. The application needs to read a high volume of data from the database, but the developer wants to minimize read capacity unit (RCU) consumption to reduce costs. Which solution should the developer implement to achieve this?Options:A) Use Amazon ElastiCache for Memcached to cache DynamoDB query results.B) Implement Amazon DynamoDB Accelerator (DAX) to cache the read operations.C) Increase the provisioned read capacity units on the DynamoDB table.D) Convert the DynamoDB table to an On-Demand capacity mode.E) Store the high-volume read data in Amazon S3 and query it using Amazon Athena.F) Set up an AWS Step Functions state machine to throttle the database reads.Correct Answer: BExplanation:Overall Explanation: Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available, in-memory cache for DynamoDB that delivers up to a 10 times performance improvement. It is specifically designed to reduce the read load on DynamoDB tables, which directly minimizes RCU consumption for read-heavy workloads.Option A is incorrect: While ElastiCache can be used for caching, DAX is tightly integrated with DynamoDB and requires no application logic changes to manage cache invalidation, making it the AWS recommended approach for DynamoDB.Option B is correct: DAX caches read operations, serving them from memory and significantly reducing the number of RCUs consumed by the underlying table.Option C is incorrect: Increasing provisioned RCUs will handle the load but will increase costs, contradicting the requirement to minimize RCU consumption.Option D is incorrect: On-Demand capacity scales automatically but charges per read request, which would likely increase costs for a high-volume read application rather than minimizing them.Option E is incorrect: Moving data to S3 and using Athena is an architectural overhaul meant for analytics, not for a low-latency serverless application backend.Option F is incorrect: Step Functions are used for orchestrating workflows, not for caching or throttling direct database reads to save RCUs.Question 2: A developer is writing an AWS IAM policy to grant an Amazon EC2 instance access to an Amazon S3 bucket. The application running on the EC2 instance needs to put objects into the bucket and encrypt them using an AWS KMS customer managed key. Which combination of permissions must be included in the IAM policy attached to the EC2 instance role?Options:A) s3:PutObject and kms:GenerateDataKeyB) s3:PutObject and kms:DecryptC) s3:GetObject and kms:EncryptD) s3:PutObject, kms:Encrypt, and kms:DecryptE) s3:PutBucketPolicy and kms:CreateKeyF) s3:PutObjectAcl and kms:DescribeKeyCorrect Answer: AExplanation:Overall Explanation: To upload an object to S3 with KMS encryption (SSE-KMS), the principal needs the s3:PutObject permission to write to the bucket and the kms:GenerateDataKey permission. S3 uses the KMS key to generate a data key that encrypts the object.Option A is correct: The application requires s3:PutObject to upload files and kms:GenerateDataKey so S3 can request a data key from KMS to encrypt the object upon upload.Option B is incorrect: kms:Decrypt is required when reading or downloading an encrypted object, not when putting/encrypting it.Option C is incorrect: s3:GetObject is for reading objects. S3 uses kms:GenerateDataKey for encryption during upload, not kms:Encrypt.Option D is incorrect: kms:Encrypt and kms:Decrypt are not the correct permissions used by S3 for server-side encryption with KMS.Option E is incorrect: s3:PutBucketPolicy modifies bucket rules, and kms:CreateKey creates new KMS keys. The developer just needs to use an existing key to upload objects.Option F is incorrect: s3:PutObjectAcl modifies access control lists, and kms:DescribeKey only views key metadata, neither of which encrypts or uploads the object data.Question 3: A developer needs to deploy a new version of an application to AWS Elastic Beanstalk. The deployment must result in zero downtime and retain the original environment's configuration. Traffic should be switched immediately to the new version once it is fully deployed and healthy. Which deployment method meets these requirements?Options:A) All at once deploymentB) Rolling deploymentC) Rolling with additional batch deploymentD) Immutable deploymentE) Blue/Green deployment using a CNAME swapF) Canary deployment using AWS CodeDeployCorrect Answer: EExplanation:Overall Explanation: A Blue/Green deployment involves running two identical environments. The new version is deployed to a separate, fresh environment. Once it passes health checks, traffic is instantly routed from the old environment to the new one using a Route 53 CNAME swap, ensuring zero downtime.Option A is incorrect: "All at once" takes the entire environment offline during the update, causing significant downtime.Option B is incorrect: "Rolling deployment" reduces capacity during the update and routes traffic to both old and new versions simultaneously, which does not switch traffic immediately.Option C is incorrect: "Rolling with additional batch" maintains full capacity but still routes traffic to mixed versions during the deployment process.Option D is incorrect: "Immutable deployment" spins up new instances in a temporary Auto Scaling group. While safe, a CNAME swap is the standard Elastic Beanstalk method for instant, zero-downtime environment cutovers.Option E is correct: A Blue/Green deployment via CNAME swap provisions a completely isolated environment and shifts 100% of the traffic instantly with zero downtime.Option F is incorrect: Elastic Beanstalk uses Blue/Green via CNAME swaps natively. Canary deployments are a feature of API Gateway or CodeDeploy, not the native Beanstalk deployment policies.Welcome to the Mock Exam Practice Tests Academy to help you prepare for your AWS Certified Developer - Associate (DVA-C02)You can retake the exams as many times as you wantThis is a huge original question bankYou get support from instructors if you have questionsEach question has a detailed explanationMobile-compatible with the Udemy appI hope that by now you're convinced! And there are a lot more questions inside the course.