The AWS Certified Developer Associate is designed to test both knowledge and application, which is why practice is so important. This test allows you to experience exam-style questions in a structured format. As you go through it, focus on understanding the logic behind each answer rather than guessing. This will help you build a stronger foundation and improve your chances of success.
Updated for 2026: This guide provides a structured approach to help you prepare effectively, understand key concepts, and practice real exam-level questions.
How to Use This Practice Test
- Start by reviewing key concepts before attempting questions
- Take the test in a timed environment
- Analyze your mistakes and revisit weak areas
Why This Practice Test Matters
This practice test is designed to simulate the real exam environment and help you identify knowledge gaps, improve accuracy, and build confidence.
| Exam Name | DVA-C02 Practice Exam – AWS Certified Developer Associate (2026 Updated) |
|---|---|
| Exam Provider | Amazon Web Services (AWS) |
| Certification Type | Associate-Level Certification (Application Development & Deployment on AWS) |
| Total Practice Questions | 150 Advanced MCQs (Scenario-Based + Lambda + API Gateway + CI/CD + Debugging) |
| Exam Domains Covered | • Development with AWS Services (Lambda, DynamoDB, API Gateway, S3) • Security (IAM, Cognito, KMS, Secrets Manager) • Deployment (CodePipeline, CodeBuild, CodeDeploy, CloudFormation) • Troubleshooting & Optimization (CloudWatch, X-Ray, Logging) • Event-Driven Architecture (SQS, SNS, EventBridge, Kinesis) |
| Questions in Real Exam | • Total: ~65 Questions • Scenario-driven with real-world application development cases • Focus on debugging, deployment strategies, and AWS service integration |
| Exam Duration | • Total Time: 130 Minutes • Moderate-to-fast pace with applied reasoning questions • Requires hands-on AWS development experience |
| Passing Score | • Scaled Score: 720 / 1000 • Requires strong understanding of AWS development practices • Emphasis on practical problem-solving and debugging |
| Question Format | • Multiple Choice & Multiple Response • Scenario-Based Coding & Architecture Questions • CI/CD & Deployment Cases • Debugging & Performance Optimization • Security & Access Control Scenarios |
| Difficulty Level | Intermediate to Advanced (Hands-On Development + Scenario Thinking) |
| Key Knowledge Areas | • Serverless development (Lambda, API Gateway, Step Functions) • Event-driven architecture (SNS, SQS, EventBridge, Kinesis) • CI/CD pipelines (CodePipeline, CodeBuild, CodeDeploy) • Security (IAM roles, Cognito authentication, KMS encryption) • Monitoring & debugging (CloudWatch, X-Ray, Logs Insights) • Data storage (DynamoDB, S3, RDS) |
| Common Exam Traps | • Confusing SNS vs SQS (pub/sub vs queue) • Ignoring Lambda retries and idempotency issues • Misconfiguring IAM roles and permissions • Overusing EC2 instead of serverless services • Missing API Gateway throttling and caching features • Not handling DLQs for failed events • Choosing wrong database type (DynamoDB vs RDS) |
| Skills Developed | • Building scalable serverless applications • Designing event-driven architectures • Implementing secure AWS applications • Automating deployments with CI/CD pipelines • Debugging distributed systems • Optimizing application performance and cost |
| Study Strategy | • Focus on Lambda + API Gateway integration scenarios • Practice event-driven design patterns deeply • Learn CI/CD pipelines (CodePipeline, CodeBuild, CodeDeploy) • Understand IAM roles and permission boundaries • Use CloudWatch and X-Ray for debugging practice • Take full-length timed mock exams • Review explanations to identify hidden exam traps |
| Best For | • Software developers working with AWS • Backend engineers building cloud-native apps • DevOps engineers handling CI/CD pipelines • Professionals transitioning into AWS development roles |
| Career Benefits | • Validates real-world AWS development skills • Opens roles in backend development and cloud engineering • Enhances knowledge of serverless and event-driven systems • Increases earning potential in cloud development roles • Builds strong foundation for professional-level AWS certifications |
| Updated | 2026 Latest Version – Based on AWS DVA-C02 Exam Guide & Real Exam Patterns |
1.
A developer wants to run code without managing servers. What is BEST?
A. EC2
B. Lambda
C. RDS
D. EBS
Answer: B
Rationale: AWS Lambda allows developers to run code without provisioning or managing servers. It automatically scales based on demand and charges only for execution time, making it ideal for event-driven architectures.
2.
A developer needs to store application data as key-value pairs. What is BEST?
A. RDS
B. DynamoDB
C. S3
D. EBS
Answer: B
Rationale: DynamoDB is a fully managed NoSQL database designed for key-value and document storage with low latency and automatic scaling.
3.
A developer wants to trigger code when an S3 object is uploaded. What is BEST?
A. EC2
B. Lambda with S3 event
C. RDS
D. EBS
Answer: B
Rationale: S3 event notifications can trigger Lambda functions, enabling event-driven processing.
4.
A developer wants to expose APIs for a serverless application. What is BEST?
A. EC2
B. API Gateway
C. S3
D. EBS
Answer: B
Rationale: API Gateway allows developers to create, publish, and manage APIs.
5.
A developer wants to deploy code automatically. What is BEST?
A. CodeDeploy
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeDeploy automates deployments across services.
6.
A developer wants continuous integration. What is BEST?
A. CodeBuild
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeBuild compiles and tests code.
7.
A developer wants to manage application secrets. What is BEST?
A. S3
B. Secrets Manager
C. CloudWatch
D. Lambda
Answer: B
Rationale: Secrets Manager securely stores and rotates secrets.
8.
A developer needs to cache frequently accessed data. What is BEST?
A. RDS
B. ElastiCache
C. DynamoDB
D. S3
Answer: B
Rationale: ElastiCache improves performance.
9.
A developer wants to log application activity. What is BEST?
A. CloudTrail
B. CloudWatch Logs
C. Config
D. Lambda
Answer: B
Rationale: CloudWatch Logs stores application logs.
10.
A developer wants to track API calls. What is BEST?
A. CloudTrail
B. CloudWatch
C. Config
D. Lambda
Answer: A
Rationale: CloudTrail logs API calls.
11.
A developer wants to use environment variables in Lambda. What is BEST?
A. Store in code
B. Use environment variables
C. Use S3
D. Use RDS
Answer: B
Rationale: Environment variables provide configuration without changing code.
12.
A developer wants to decouple application components. What is BEST?
A. SNS
B. SQS
C. Lambda
D. EC2
Answer: B
Rationale: SQS decouples components.
13.
A developer wants pub/sub messaging. What is BEST?
A. SNS
B. SQS
C. Lambda
D. EC2
Answer: A
Rationale: SNS provides pub/sub.
14.
A developer wants to deploy infrastructure as code. What is BEST?
A. CloudFormation
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CloudFormation enables IaC.
15.
A developer wants to manage access securely. What is BEST?
A. IAM
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: IAM manages access control.
16.
A developer wants to store static content. What is BEST?
A. S3
B. EC2
C. RDS
D. DynamoDB
Answer: A
Rationale: S3 stores static files.
17.
A developer wants serverless workflows. What is BEST?
A. Step Functions
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Step Functions orchestrate workflows.
18.
A developer wants to containerize applications. What is BEST?
A. ECS
B. EC2
C. S3
D. RDS
Answer: A
Rationale: ECS runs containers.
19.
A developer wants serverless containers. What is BEST?
A. ECS
B. Fargate
C. EC2
D. Lambda
Answer: B
Rationale: Fargate runs containers without servers.
20.
A developer wants to store files for backup. What is BEST?
A. S3
B. EBS
C. EC2
D. RDS
Answer: A
Rationale: S3 is ideal for backups.
21.
A developer wants to monitor application metrics. What is BEST?
A. CloudWatch
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch monitors metrics.
22.
A developer wants to build CI/CD pipeline. What is BEST?
A. CodePipeline
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodePipeline automates CI/CD.
23.
A developer wants to analyze logs. What is BEST?
A. CloudWatch Logs Insights
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: Logs Insights enables log queries.
24.
A developer wants to secure APIs. What is BEST?
A. IAM roles
B. API Gateway + authorizer
C. S3
D. EC2
Answer: B
Rationale: API Gateway authorizers secure APIs.
25.
A developer wants to use NoSQL DB. What is BEST?
A. RDS
B. DynamoDB
C. Redshift
D. S3
Answer: B
Rationale: DynamoDB is NoSQL.
26.
A developer wants event-driven architecture. What is BEST?
A. Lambda
B. EC2
C. RDS
D. EBS
Answer: A
Rationale: Lambda supports event-driven design.
27.
A developer wants to scale automatically. What is BEST?
A. Auto Scaling
B. EC2 manual
C. S3
D. RDS
Answer: A
Rationale: Auto Scaling adjusts capacity.
28.
A developer wants to deploy serverless APIs. What is BEST?
A. API Gateway + Lambda
B. EC2
C. S3
D. RDS
Answer: A
Rationale: API Gateway + Lambda enables serverless APIs.
29.
A developer wants to encrypt data at rest. What is BEST?
A. IAM
B. KMS
C. CloudWatch
D. Lambda
Answer: B
Rationale: KMS manages encryption keys.
30.
A developer wants to automate deployments. What is BEST?
A. CodeDeploy
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeDeploy automates deployments.
31.
A Lambda function times out during heavy processing. What is the BEST solution?
A. Increase memory and timeout
B. Use S3
C. Use RDS
D. Use EC2
Answer: A
Rationale: Increasing memory also increases CPU allocation in Lambda, improving execution speed. Extending timeout ensures long-running tasks complete without premature termination.
32.
A developer wants to ensure idempotent Lambda processing. What is BEST?
A. Ignore duplicates
B. Use unique request IDs and deduplication logic
C. Use EC2
D. Use RDS
Answer: B
Rationale: Idempotency ensures repeated executions do not produce duplicate results. Using unique identifiers and conditional writes prevents duplicate processing in retry scenarios.
33.
A developer needs asynchronous processing between services. What is BEST?
A. SNS + SQS
B. EC2
C. RDS
D. S3
Answer: A
Rationale: SNS provides pub/sub messaging, while SQS queues messages for asynchronous processing, decoupling components and improving scalability and fault tolerance.
34.
A Lambda function must access a DynamoDB table securely. What is BEST?
A. Hardcode credentials
B. IAM role attached to Lambda
C. Store credentials in code
D. Use EC2
Answer: B
Rationale: IAM roles provide secure, temporary credentials without embedding secrets, following AWS security best practices.
35.
A developer wants to reduce cold starts in Lambda. What is BEST?
A. Increase memory
B. Provisioned concurrency
C. Use EC2
D. Use S3
Answer: B
Rationale: Provisioned concurrency keeps Lambda instances warm, eliminating cold start latency for critical applications.
36.
A developer wants to trigger a workflow after multiple Lambda steps. What is BEST?
A. Step Functions
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Step Functions orchestrate multiple Lambda functions with state management, retries, and branching logic.
37.
A developer needs to store secrets securely for an app. What is BEST?
A. S3
B. Secrets Manager
C. CloudWatch
D. Lambda
Answer: B
Rationale: Secrets Manager securely stores and rotates secrets with encryption.
38.
A developer wants to monitor Lambda errors. What is BEST?
A. CloudTrail
B. CloudWatch Logs and alarms
C. Config
D. Lambda
Answer: B
Rationale: CloudWatch logs capture errors, and alarms notify developers when thresholds are exceeded.
39.
A developer wants to deploy code automatically after commit. What is BEST?
A. CodePipeline
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodePipeline automates CI/CD workflows.
40.
A developer wants to test code in isolation. What is BEST?
A. Unit tests in CodeBuild
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeBuild runs automated tests.
41.
A developer needs API authentication. What is BEST?
A. IAM
B. API Gateway authorizer
C. S3
D. EC2
Answer: B
Rationale: API Gateway authorizers provide authentication and authorization.
42.
A developer wants caching for API responses. What is BEST?
A. DynamoDB
B. API Gateway caching
C. EC2
D. RDS
Answer: B
Rationale: API Gateway caching reduces backend load.
43.
A developer wants to decouple microservices. What is BEST?
A. SQS
B. EC2
C. RDS
D. S3
Answer: A
Rationale: SQS enables decoupling.
44.
A developer wants pub/sub messaging. What is BEST?
A. SNS
B. SQS
C. Lambda
D. EC2
Answer: A
Rationale: SNS provides pub/sub.
45.
A developer wants to log API activity. What is BEST?
A. CloudTrail
B. CloudWatch
C. Config
D. Lambda
Answer: A
Rationale: CloudTrail logs API calls.
46.
A developer needs to encrypt environment variables. What is BEST?
A. IAM
B. KMS
C. CloudWatch
D. Lambda
Answer: B
Rationale: KMS encrypts sensitive data.
47.
A developer wants to process messages reliably. What is BEST?
A. SQS with DLQ
B. EC2
C. RDS
D. S3
Answer: A
Rationale: Dead-letter queues handle failed messages.
48.
A developer wants to retry failed events automatically. What is BEST?
A. Lambda retries + DLQ
B. EC2
C. RDS
D. S3
Answer: A
Rationale: Lambda retries and DLQ handle failures.
49.
A developer wants to deploy infrastructure. What is BEST?
A. CloudFormation
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CloudFormation enables IaC.
50.
A developer wants to containerize apps. What is BEST?
A. ECS
B. EC2
C. S3
D. RDS
Answer: A
Rationale: ECS runs containers.
51.
A developer wants serverless containers. What is BEST?
A. ECS
B. Fargate
C. EC2
D. Lambda
Answer: B
Rationale: Fargate removes server management.
52.
A developer wants event-driven pipelines. What is BEST?
A. EventBridge
B. EC2
C. S3
D. RDS
Answer: A
Rationale: EventBridge triggers events.
53.
A developer needs file storage. What is BEST?
A. S3
B. EC2
C. RDS
D. DynamoDB
Answer: A
Rationale: S3 stores files.
54.
A developer wants NoSQL DB. What is BEST?
A. RDS
B. DynamoDB
C. Redshift
D. S3
Answer: B
Rationale: DynamoDB is NoSQL.
55.
A developer wants relational DB. What is BEST?
A. RDS
B. DynamoDB
C. Redshift
D. S3
Answer: A
Rationale: RDS is relational.
56.
A developer wants analytics. What is BEST?
A. Redshift
B. DynamoDB
C. RDS
D. EC2
Answer: A
Rationale: Redshift is analytics.
57.
A developer wants monitoring. What is BEST?
A. CloudWatch
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch monitors.
58.
A developer wants CI/CD pipeline. What is BEST?
A. CodePipeline
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodePipeline automates CI/CD.
59.
A developer wants to debug logs. What is BEST?
A. CloudWatch Logs Insights
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: Logs Insights analyzes logs.
60.
A developer wants serverless architecture. What is BEST?
A. Lambda + API Gateway
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Serverless reduces operational overhead.
61.
A Lambda function processing SQS messages is failing repeatedly. What is the BEST solution?
A. Increase memory
B. Configure a Dead Letter Queue (DLQ)
C. Use EC2
D. Use S3
Answer: B
Rationale: A DLQ ensures failed messages are not lost and can be analyzed later. Without a DLQ, messages may be retried indefinitely or discarded, making debugging difficult and risking data loss in production systems.
62.
A developer wants to ensure secure API access using JWT tokens. What is BEST?
A. IAM only
B. API Gateway Lambda authorizer
C. S3
D. EC2
Answer: B
Rationale: Lambda authorizers validate JWT tokens and provide fine-grained access control. This allows secure authentication and authorization for APIs while integrating with identity providers.
63.
A Lambda function must process events in order. What is BEST?
A. SNS
B. SQS FIFO queue
C. S3
D. DynamoDB
Answer: B
Rationale: SQS FIFO queues guarantee message ordering and exactly-once processing. This is critical when sequence matters, such as financial transactions or ordered event processing pipelines.
64.
A developer wants to cache frequently accessed DynamoDB data. What is BEST?
A. S3
B. ElastiCache
C. RDS
D. EC2
Answer: B
Rationale: ElastiCache stores frequently accessed data in memory, reducing DynamoDB read load and improving latency significantly, which is essential for high-performance applications.
65.
A Lambda function needs to access resources in a VPC. What is required?
A. Nothing
B. Configure VPC settings in Lambda
C. Use S3
D. Use RDS
Answer: B
Rationale: Lambda must be configured with VPC subnets and security groups to access private resources such as RDS databases, otherwise it cannot reach internal endpoints.
66.
A developer wants to automate deployments with rollback support. What is BEST?
A. CodeDeploy
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeDeploy supports automated deployments with rollback capabilities in case of failures, ensuring application stability and minimizing downtime during releases.
67.
A developer needs to monitor API latency. What is BEST?
A. CloudTrail
B. CloudWatch metrics
C. Config
D. Lambda
Answer: B
Rationale: CloudWatch provides latency metrics and dashboards, enabling performance monitoring and alerting for APIs in real time.
68.
A developer wants to retry failed Lambda executions asynchronously. What is BEST?
A. Manual retry
B. Configure Lambda retry behavior
C. Use EC2
D. Use S3
Answer: B
Rationale: Lambda automatically retries asynchronous invocations. Configuring retry settings ensures failed executions are retried before being sent to a DLQ.
69.
A developer needs to store application configuration securely. What is BEST?
A. Hardcode values
B. Systems Manager Parameter Store
C. S3
D. EC2
Answer: B
Rationale: Parameter Store securely stores configuration values and integrates with IAM and KMS for encryption, avoiding hardcoding sensitive data.
70.
A developer wants to decouple services with guaranteed delivery. What is BEST?
A. SNS
B. SQS
C. Lambda
D. EC2
Answer: B
Rationale: SQS ensures message durability and reliable delivery, making it ideal for decoupled architectures where messages must not be lost.
71.
A developer wants to deploy multiple services together. What is BEST?
A. CloudFormation
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CloudFormation enables infrastructure as code, allowing multiple resources to be deployed consistently and reproducibly.
72.
A developer wants to trigger workflows based on events. What is BEST?
A. EventBridge
B. EC2
C. S3
D. RDS
Answer: A
Rationale: EventBridge routes events between services and triggers workflows, enabling event-driven architectures.
73.
A developer needs to debug Lambda performance issues. What is BEST?
A. CloudTrail
B. CloudWatch Logs and X-Ray
C. Config
D. S3
Answer: B
Rationale: AWS X-Ray traces requests across services, while CloudWatch logs provide execution details, enabling deep debugging of performance bottlenecks.
74.
A developer wants to reduce DynamoDB read costs. What is BEST?
A. Increase capacity
B. Use DAX caching
C. Use EC2
D. Use S3
Answer: B
Rationale: DynamoDB Accelerator (DAX) provides in-memory caching, reducing read operations and costs while improving performance.
75.
A developer needs to enforce least privilege access. What is BEST?
A. Full access policies
B. IAM policies with minimal permissions
C. S3
D. EC2
Answer: B
Rationale: Least privilege ensures users and services have only the permissions they need, reducing security risks and preventing accidental misuse.
76.
A developer wants to version application code deployments. What is BEST?
A. Lambda versions and aliases
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Lambda versions and aliases allow controlled deployments and traffic shifting, enabling safe releases and rollbacks.
77.
A developer wants blue/green deployments. What is BEST?
A. CodeDeploy
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeDeploy supports blue/green deployments, allowing traffic shifting between versions with minimal downtime.
78.
A developer needs API throttling. What is BEST?
A. API Gateway throttling
B. EC2
C. S3
D. RDS
Answer: A
Rationale: API Gateway throttling protects backend systems by limiting request rates, preventing overload and ensuring stability.
79.
A developer wants secure file uploads. What is BEST?
A. Public S3
B. Pre-signed URLs
C. EC2
D. RDS
Answer: B
Rationale: Pre-signed URLs allow secure, temporary access to S3 for uploads without exposing credentials.
80.
A developer needs to process large files asynchronously. What is BEST?
A. Lambda + S3 events
B. EC2
C. RDS
D. DynamoDB
Answer: A
Rationale: S3 events trigger Lambda for asynchronous processing, enabling scalable handling of large file uploads.
81.
A developer wants to monitor errors in production. What is BEST?
A. CloudTrail
B. CloudWatch alarms
C. Config
D. S3
Answer: B
Rationale: CloudWatch alarms notify developers when errors exceed thresholds, enabling proactive monitoring and faster incident response.
82.
A developer needs to manage API keys. What is BEST?
A. IAM
B. API Gateway API keys
C. S3
D. EC2
Answer: B
Rationale: API Gateway manages API keys and usage plans, controlling access and rate limits for APIs.
83.
A developer wants event filtering. What is BEST?
A. EventBridge rules
B. EC2
C. S3
D. RDS
Answer: A
Rationale: EventBridge rules filter and route events based on patterns, enabling flexible event-driven architectures.
84.
A developer needs to process high-throughput events. What is BEST?
A. SNS
B. Kinesis
C. Lambda
D. EC2
Answer: B
Rationale: Kinesis handles high-throughput streaming data with scalability and low latency.
85.
A developer wants to store session data. What is BEST?
A. DynamoDB
B. RDS
C. S3
D. EC2
Answer: A
Rationale: DynamoDB provides low-latency storage for session data and scales automatically.
86.
A developer wants to secure Lambda environment variables. What is BEST?
A. Plain text
B. KMS encryption
C. S3
D. EC2
Answer: B
Rationale: KMS encrypts environment variables, ensuring sensitive data is protected.
87.
A developer wants to trace distributed requests. What is BEST?
A. CloudTrail
B. X-Ray
C. Config
D. S3
Answer: B
Rationale: AWS X-Ray traces requests across services, helping debug distributed applications.
88.
A developer wants to automate builds. What is BEST?
A. CodeBuild
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeBuild automates building and testing code.
89.
A developer wants centralized logging. What is BEST?
A. CloudWatch Logs
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch Logs centralizes logs for monitoring and troubleshooting.
90.
A developer wants serverless backend. What is BEST?
A. Lambda + API Gateway
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Lambda and API Gateway provide fully serverless backend infrastructure, reducing operational overhead and enabling scalability.
91.
A Lambda function is throttled due to high concurrency. What is the BEST solution?
A. Increase timeout
B. Increase reserved concurrency
C. Use S3
D. Use RDS
Answer: B
Rationale: Reserved concurrency increases the number of concurrent executions allowed for a Lambda function, preventing throttling during peak traffic while ensuring predictable scaling.
92.
A developer wants to limit API usage per client. What is BEST?
A. IAM
B. API Gateway usage plans
C. S3
D. EC2
Answer: B
Rationale: Usage plans enforce quotas and throttling per API key, allowing fine-grained control over client consumption and protecting backend resources from abuse.
93.
A developer needs guaranteed message delivery with ordering. What is BEST?
A. SNS
B. SQS FIFO
C. Lambda
D. EC2
Answer: B
Rationale: SQS FIFO queues ensure ordered message delivery and exactly-once processing, making them ideal for workflows requiring strict sequencing and reliability.
94.
A developer wants to debug distributed microservices. What is BEST?
A. CloudTrail
B. X-Ray
C. Config
D. S3
Answer: B
Rationale: AWS X-Ray provides end-to-end tracing across services, helping identify latency issues, bottlenecks, and failures in distributed architectures.
95.
A Lambda function fails intermittently due to external API issues. What is BEST?
A. Ignore failures
B. Implement retries with exponential backoff
C. Use EC2
D. Use S3
Answer: B
Rationale: Exponential backoff reduces load on failing services and improves reliability by spacing retries, preventing cascading failures.
96.
A developer wants zero-downtime deployments. What is BEST?
A. Manual deployment
B. Blue/green deployment with CodeDeploy
C. EC2
D. S3
Answer: B
Rationale: Blue/green deployments shift traffic gradually, enabling safe releases and rollback without downtime.
97.
A developer needs secure API authentication with OAuth. What is BEST?
A. IAM
B. API Gateway + Cognito
C. S3
D. EC2
Answer: B
Rationale: Cognito integrates with API Gateway to provide OAuth-based authentication and user management.
98.
A developer wants to encrypt data in transit. What is BEST?
A. IAM
B. TLS/HTTPS
C. S3
D. EC2
Answer: B
Rationale: TLS/HTTPS ensures encryption during data transmission, protecting against interception and man-in-the-middle attacks.
99.
A developer needs to handle duplicate events. What is BEST?
A. Ignore duplicates
B. Idempotent processing
C. Use EC2
D. Use S3
Answer: B
Rationale: Idempotency ensures repeated processing produces the same result, preventing duplicate data issues.
100.
A developer wants to store large files efficiently. What is BEST?
A. DynamoDB
B. S3
C. RDS
D. EC2
Answer: B
Rationale: S3 provides scalable, durable storage for large objects.
101.
A developer wants to monitor API errors. What is BEST?
A. CloudTrail
B. CloudWatch metrics and alarms
C. Config
D. Lambda
Answer: B
Rationale: CloudWatch provides real-time monitoring and alerting.
102.
A developer needs to manage infrastructure changes safely. What is BEST?
A. Manual changes
B. CloudFormation change sets
C. EC2
D. S3
Answer: B
Rationale: Change sets preview infrastructure changes before execution, reducing risk.
103.
A developer wants event-driven architecture. What is BEST?
A. EventBridge
B. EC2
C. RDS
D. S3
Answer: A
Rationale: EventBridge enables event-driven workflows.
104.
A developer needs high-throughput event ingestion. What is BEST?
A. SNS
B. Kinesis
C. Lambda
D. EC2
Answer: B
Rationale: Kinesis handles high-throughput streaming data.
105.
A developer wants to secure secrets in code. What is BEST?
A. Hardcode
B. Secrets Manager
C. S3
D. EC2
Answer: B
Rationale: Secrets Manager securely stores sensitive data.
106.
A developer needs reliable message processing. What is BEST?
A. SNS
B. SQS with DLQ
C. Lambda
D. EC2
Answer: B
Rationale: DLQ captures failed messages for analysis.
107.
A developer wants to reduce latency. What is BEST?
A. Increase memory
B. Use caching
C. Use EC2
D. Use S3
Answer: B
Rationale: Caching reduces response time and backend load.
108.
A developer wants to deploy microservices. What is BEST?
A. ECS
B. EC2
C. S3
D. RDS
Answer: A
Rationale: ECS manages containers for microservices.
109.
A developer wants serverless containers. What is BEST?
A. ECS
B. Fargate
C. EC2
D. Lambda
Answer: B
Rationale: Fargate removes server management.
110.
A developer wants API caching. What is BEST?
A. API Gateway cache
B. EC2
C. S3
D. RDS
Answer: A
Rationale: API Gateway caching reduces backend calls.
111.
A developer wants centralized logging. What is BEST?
A. CloudWatch Logs
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch Logs centralizes logs.
112.
A developer needs build automation. What is BEST?
A. CodeBuild
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeBuild automates builds.
113.
A developer wants CI/CD pipeline. What is BEST?
A. CodePipeline
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodePipeline automates CI/CD.
114.
A developer needs API throttling. What is BEST?
A. API Gateway throttling
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Throttling protects backend systems.
115.
A developer wants secure file upload. What is BEST?
A. Public S3
B. Pre-signed URLs
C. EC2
D. RDS
Answer: B
Rationale: Pre-signed URLs allow secure uploads.
116.
A developer needs retry logic. What is BEST?
A. Ignore errors
B. Exponential backoff
C. EC2
D. S3
Answer: B
Rationale: Backoff improves reliability.
117.
A developer wants distributed tracing. What is BEST?
A. CloudTrail
B. X-Ray
C. Config
D. S3
Answer: B
Rationale: X-Ray traces requests.
118.
A developer wants scalable DB. What is BEST?
A. DynamoDB
B. RDS
C. EC2
D. S3
Answer: A
Rationale: DynamoDB scales automatically.
119.
A developer needs relational DB. What is BEST?
A. RDS
B. DynamoDB
C. Redshift
D. S3
Answer: A
Rationale: RDS provides relational DB.
120.
A developer wants serverless backend. What is BEST?
A. Lambda + API Gateway
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Serverless backend reduces operational overhead and scales automatically.
121.
A Lambda processing SQS batches fails for a few records only. What is BEST?
A. Retry entire batch
B. Enable partial batch response
C. Use EC2
D. Use S3
Answer: B
Rationale: Partial batch response lets Lambda acknowledge successful records while retrying only failed ones, reducing duplicate processing and improving efficiency for large batches.
122.
A developer wants to prevent one noisy Lambda from consuming all concurrency. What is BEST?
A. Increase timeout
B. Set reserved concurrency
C. Use S3
D. Use RDS
Answer: B
Rationale: Reserved concurrency limits the maximum concurrent executions for a function, protecting other functions from being throttled and ensuring fair resource allocation.
123.
A developer needs to restrict S3 access by IP. What is BEST?
A. IAM only
B. Bucket policy with condition
C. EC2
D. RDS
Answer: B
Rationale: Bucket policies with condition keys (like aws:SourceIp) allow restricting access based on IP address, improving security without changing application code.
124.
A Lambda must process high-throughput Kinesis data. What is BEST?
A. Single shard
B. Increase shards and parallelization
C. Use S3
D. Use RDS
Answer: B
Rationale: Increasing shard count and enabling parallelization improves throughput and processing speed for Kinesis-based Lambda consumers.
125.
A developer wants to secure API Gateway with IAM auth. What is BEST?
A. Public API
B. IAM authorization
C. S3
D. EC2
Answer: B
Rationale: IAM authorization ensures only authenticated AWS users can access APIs, providing fine-grained control via policies.
126.
A developer needs to rotate database credentials automatically. What is BEST?
A. Hardcode
B. Secrets Manager rotation
C. S3
D. EC2
Answer: B
Rationale: Secrets Manager supports automatic rotation of credentials, improving security and reducing manual effort.
127.
A Lambda function accesses DynamoDB frequently with low latency requirement. What is BEST?
A. RDS
B. DynamoDB with DAX
C. S3
D. EC2
Answer: B
Rationale: DynamoDB Accelerator (DAX) provides in-memory caching, reducing read latency and improving performance for high-read workloads.
128.
A developer needs to enforce HTTPS for S3 access. What is BEST?
A. IAM
B. Bucket policy condition
C. EC2
D. RDS
Answer: B
Rationale: Bucket policies can enforce secure transport using conditions like aws:SecureTransport, ensuring all requests use HTTPS.
129.
A developer wants canary deployments for Lambda. What is BEST?
A. Manual deploy
B. Lambda aliases with traffic shifting
C. EC2
D. S3
Answer: B
Rationale: Lambda aliases support weighted traffic shifting, enabling canary deployments and gradual rollouts with minimal risk.
130.
A developer needs to process duplicate events safely. What is BEST?
A. Ignore duplicates
B. Idempotent logic with unique keys
C. EC2
D. S3
Answer: B
Rationale: Idempotent logic ensures duplicate events do not cause inconsistent results, which is critical in distributed systems.
131.
A developer wants to throttle Lambda concurrency globally. What is BEST?
A. Increase memory
B. Account concurrency limit
C. S3
D. RDS
Answer: B
Rationale: Account-level concurrency limits control total Lambda executions across all functions, preventing resource exhaustion.
132.
A developer needs to debug API Gateway errors. What is BEST?
A. CloudTrail
B. CloudWatch logs and execution logs
C. Config
D. S3
Answer: B
Rationale: API Gateway integrates with CloudWatch for execution logs, helping identify request/response errors and latency issues.
133.
A developer wants secure temporary credentials. What is BEST?
A. Hardcode
B. STS tokens
C. S3
D. EC2
Answer: B
Rationale: AWS STS provides temporary credentials, improving security and reducing risk of long-term credential exposure.
134.
A developer wants event filtering for Lambda triggers. What is BEST?
A. EC2
B. EventBridge rules
C. S3
D. RDS
Answer: B
Rationale: EventBridge allows filtering events before invoking Lambda, reducing unnecessary executions and cost.
135.
A developer needs to ensure ordered processing in Kinesis. What is BEST?
A. Random partition key
B. Same partition key
C. S3
D. RDS
Answer: B
Rationale: Kinesis guarantees ordering per shard; using the same partition key ensures events are processed in sequence.
136.
A developer wants to secure environment variables. What is BEST?
A. Plain text
B. KMS encryption
C. S3
D. EC2
Answer: B
Rationale: KMS encrypts sensitive data in environment variables, ensuring security compliance.
137.
A developer needs to retry failed API calls. What is BEST?
A. Ignore
B. Exponential backoff
C. EC2
D. S3
Answer: B
Rationale: Backoff reduces system stress and improves success rates.
138.
A developer wants centralized metrics. What is BEST?
A. CloudWatch
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch aggregates metrics across services.
139.
A developer needs CI/CD rollback. What is BEST?
A. Manual rollback
B. CodeDeploy automatic rollback
C. EC2
D. S3
Answer: B
Rationale: CodeDeploy automatically rolls back failed deployments.
140.
A developer wants API authorization using Cognito. What is BEST?
A. IAM
B. Cognito authorizer
C. S3
D. EC2
Answer: B
Rationale: Cognito integrates with API Gateway for authentication.
141.
A developer wants high-throughput ingestion. What is BEST?
A. SNS
B. Kinesis
C. Lambda
D. EC2
Answer: B
Rationale: Kinesis handles streaming data at scale.
142.
A developer wants secure uploads. What is BEST?
A. Public S3
B. Pre-signed URLs
C. EC2
D. RDS
Answer: B
Rationale: Pre-signed URLs provide secure temporary access.
143.
A developer wants event-driven pipelines. What is BEST?
A. EventBridge
B. EC2
C. S3
D. RDS
Answer: A
Rationale: EventBridge enables event-driven workflows.
144.
A developer needs monitoring alerts. What is BEST?
A. CloudWatch alarms
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch alarms notify issues.
145.
A developer wants logging. What is BEST?
A. CloudWatch Logs
B. CloudTrail
C. Config
D. Lambda
Answer: A
Rationale: CloudWatch Logs centralizes logs.
146.
A developer needs build automation. What is BEST?
A. CodeBuild
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodeBuild automates builds.
147.
A developer wants pipeline automation. What is BEST?
A. CodePipeline
B. EC2
C. S3
D. RDS
Answer: A
Rationale: CodePipeline automates CI/CD.
148.
A developer wants scalable DB. What is BEST?
A. DynamoDB
B. RDS
C. EC2
D. S3
Answer: A
Rationale: DynamoDB scales automatically.
149.
A developer needs relational DB. What is BEST?
A. RDS
B. DynamoDB
C. Redshift
D. S3
Answer: A
Rationale: RDS provides relational database.
150.
A developer wants serverless backend. What is BEST?
A. Lambda + API Gateway
B. EC2
C. S3
D. RDS
Answer: A
Rationale: Serverless backend reduces operational overhead and scales automatically.
Frequently Asked Questions
How accurate is this AWS Certified Developer Associate practice test compared to the real exam?
Yes, this practice test is designed to reflect real exam patterns, structure, and difficulty level to help you prepare effectively.
What is the best way to use this AWS Certified Developer Associate test for preparation?
Take the test in a timed setting, review your answers carefully, and focus on improving weak areas after each attempt.
How many times should I attempt this AWS Certified Developer Associate test?
Yes, repeating the test helps reinforce concepts, improve accuracy, and build confidence for the actual exam.
Who should use this AWS Certified Developer Associate practice test?
This practice test is suitable for both beginners and retakers who want to improve their understanding and performance.