Comprehensive AWS Certified Developer Associate Exam Resource | Full Practice Question Bank, Exam Answer Explanations, Study Guide, and Certification Prep for Cloud Developers and IT Professionals (Updated 2025–2026 Study Pack)

AWS Certified Developer Exam Prep | Complete Test
Bank, Practice Questions, Verified Answer Key, and
Study Guide with Detailed Rationales for Cloud
Application Development and AWS Certification
Success (Latest 2025–2026 Edition)

Question 1
Which AWS service is primarily used for building serverless applications?
(A) Amazon EC2
(B) Amazon RDS
(C) AWS Lambda
(D) Amazon S3
Correct Option: (C)
Rationale: AWS Lambda allows you to run code without provisioning or managing
servers, making it a key component of serverless architectures.


Question 2
What is the primary purpose of Amazon S3?
(A) Compute power
(B) Object storage
(C) Database management
(D) Networking
Correct Option: (B)
Rationale: Amazon S3 is designed for object storage, allowing you to store and retrieve
any amount of data from anywhere on the web.


Question 3
Which AWS service is used for managing access to AWS resources?
(A) Amazon EC2
(B) AWS Identity and Access Management (IAM)
(C) Amazon RDS
(D) AWS CloudFormation
Correct Option: (B)
Rationale: IAM allows you to manage users and their permissions to access AWS
resources securely.


Question 4

,What is Amazon DynamoDB?
(A) A relational database
(B) A fully managed NoSQL database service
(C) A file storage service
(D) A caching service
Correct Option: (B)
Rationale: DynamoDB is a fully managed NoSQL database service that provides fast
and predictable performance with seamless scalability.


Question 5
Which AWS service provides a fully managed message queue service for
decoupling services?
(A) Amazon SNS
(B) Amazon SQS
(C) AWS Lambda
(D) Amazon Kinesis
Correct Option: (B)
Rationale: Amazon SQS (Simple Queue Service) enables decoupling and scaling of
microservices by allowing them to communicate through message queues.


Question 6
What is the primary function of AWS CloudFormation?
(A) Monitoring AWS resources
(B) Infrastructure as code
(C) Data storage
(D) Load balancing
Correct Option: (B)
Rationale: AWS CloudFormation allows you to model and provision AWS resources
using code, enabling infrastructure as code practices.


Question 7
Which AWS service is best suited for deploying and managing containerized
applications?
(A) Amazon EC2
(B) Amazon ECS (Elastic Container Service)
(C) AWS Lambda
(D) Amazon S3

,Correct Option: (B)
Rationale: Amazon ECS is a fully managed container orchestration service that
simplifies the deployment and management of containerized applications.


Question 8
What is the purpose of AWS CodePipeline?
(A) Monitoring applications
(B) Continuous integration and delivery
(C) Data warehousing
(D) Networking
Correct Option: (B)
Rationale: AWS CodePipeline automates the continuous integration and delivery
(CI/CD) process for applications, enabling faster development cycles.


Question 9
Which service can be used to securely store and manage sensitive information
such as API keys?
(A) Amazon S3
(B) Amazon RDS
(C) AWS Secrets Manager
(D) AWS Lambda
Correct Option: (C)
Rationale: AWS Secrets Manager helps you protect access to your applications,
services, and IT resources without the upfront investment and on-going maintenance
costs of operating your own infrastructure.


Question 10
What is the main benefit of using AWS Lambda?
(A) Cost-efficient storage
(B) Serverless compute
(C) Managed database service
(D) Load balancing
Correct Option: (B)
Rationale: AWS Lambda allows you to run code in response to events without
provisioning or managing servers, promoting a serverless architecture.


Question 11

, Which tool can be used to create a CI/CD pipeline in AWS?
(A) Amazon S3
(B) AWS CodePipeline
(C) Amazon EC2
(D) AWS CloudFormation
Correct Option: (B)
Rationale: AWS CodePipeline is specifically designed to automate the build, test, and
deploy phases of your release process.


Question 12
What is Amazon API Gateway primarily used for?
(A) Data storage
(B) Creating and managing APIs
(C) Serverless execution
(D) Load balancing
Correct Option: (B)
Rationale: Amazon API Gateway allows developers to create, publish, maintain,
monitor, and secure APIs at any scale.


Question 13
Which service provides a scalable, fully managed NoSQL database?
(A) Amazon RDS
(B) Amazon DynamoDB
(C) Amazon Aurora
(D) Amazon Redshift
Correct Option: (B)
Rationale: Amazon DynamoDB is a fully managed NoSQL database service that
delivers single-digit millisecond performance at any scale.


Question 14
What is the function of AWS CodeBuild?
(A) Continuous deployment
(B) Build automation
(C) Infrastructure management
(D) Monitoring