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AWS Certified Developer DVA-C02 — AWS practice for the AWS Certified Developer DVA-C02 credential

Name: AWS Certified Developer — Associate (DVA-C02) exam prep
Author: CoStudy

Last reviewed 2026-10-26 · CoStudy · how we write and review questions

AWS Certified Developer DVA-C02 is the AWS Certified Developer DVA-C02 credential. AWS writes the outline; a fail is another sitting fee and a delayed start, not a school-curve disappointment. Related CoStudy banks (aws_cloud_practitioner, aws_ai_practitioner, aws_solutions_architect_assoc, aws_sysops_assoc) test different sittings — using one as a stand-in for AWS Certified Developer DVA-C02 is how people fail the appointment they paid for.

CoStudy’s AWS Certified Developer — Associate (DVA-C02) bank holds 150 multiple-choice questions, 120 flashcards and 10 scenario simulations. Chapters in this bank follow that outline: Development with AWS Services; Security; Deployment; Troubleshooting and Optimization. The published material this bank is written against begins: AWS Certified Developer — Associate (DVA-C02) Exam Guide (public, aws.amazon.com) — 4 content domains: 1) Development with AWS Services (32%) — Lambda, DynamoDB, API Gateway, SDKs, 2) Security (26%) — IAM, KMS, Cognito, Secrets Manager, 3) Deployment (24%) — CodePipeline… Every multiple-choice item on this page shows the full rationale in the HTML. CoStudy is not AWS. We do not have live items, and we do not guarantee a result.

280 total items
150 multiple choice
120 flashcards
10 simulations
4 chapters

Study AWS Certified Developer — Associate (DVA-C02) in CoStudy →

Exam facts

Copied from the cited official page on the date shown. Rows marked unverified were not confirmed on that pass — check the certifying body before you pay or schedule. CoStudy is not the exam owner.

Fact	Detail	Source
What it is	AWS Certified Developer — Associate (DVA-C02) is administered under AWS. CoStudy is independent practice, not the exam owner.	the AWS Certification exam guides · as of 2026-10
Published outline	AWS Certified Developer — Associate (DVA-C02) Exam Guide (public, aws.amazon.com) — 4 content domains: 1) Development with AWS Services (32%) — Lambda, DynamoDB, API Gateway, SDKs, 2) Security (26%) — IAM, KMS, Cognito, Secrets Manager, 3) Deployment (24%) — CodePipeline, CodeBuild, SAM, CloudFormation, 4) Troubleshooting & Optimization (18%) — X-Ray, CloudWatch, performance tuning. MCQs reference public AWS…	the AWS Certification exam guides · as of 2026-10
Domain weights (from the outline blurb)	Development with AWS Services 32%; Security 26%; Deployment 24%; Troubleshooting & Optimization 18%	the AWS Certification exam guides · as of 2026-10
Passing score / pass rate	Only the certifying body publishes a cut score or pass rate. This page does not invent one. (unverified)	the AWS Certification exam guides · as of 2026-10
Fees and eligibility	Application, sitting, and retake rules live on AWS’s site and can change. Confirm there before you pay.	the AWS Certification exam guides · as of 2026-10

Exam format, sections and weights

Published domain weights from the cited official outline. Re-check the certifying body before you sit — weights move.

Section	Published weight
Development with AWS Services	32%
Security	26%
Deployment	24%
Troubleshooting & Optimization	18%

AWS Certified Developer DVA-C02 bank mix (this question bank)

Chapter counts below are CoStudy’s mix so you can see where practice time goes. They are not a claim that the live exam uses these item counts.

Chapter	Items in this bank
Development with AWS Services	51 (34%)
Security	38 (25%)
Deployment	28 (19%)
Troubleshooting and Optimization	33 (22%)

How this bank is different

AWS Certified Developer DVA-C02 is one AWS exam code. A Cloud Practitioner stem is not an Architect stem.
The credited answer is the service that meets the constraint (RPO, encryption, cost, ops), not the logo you used at work.
Recertification and exam versions are AWS’s. Pin the code on your voucher before you drill.

Exam format and blueprint

AWS Certified Developer — Associate (DVA-C02) Exam Guide (public, aws.amazon.com) — 4 content domains: 1) Development with AWS Services (32%) — Lambda, DynamoDB, API Gateway, SDKs, 2) Security (26%) — IAM, KMS, Cognito, Secrets Manager, 3) Deployment (24%) — CodePipeline, CodeBuild, SAM, CloudFormation, 4) Troubleshooting & Optimization (18%) — X-Ray, CloudWatch, performance tuning. MCQs reference public AWS documentation and DVA exam objectives.

What the AWS Certified Developer DVA-C02 bank covers

Each chapter follows a domain of the published exam outline. Practise one on its own (chapter URLs are in the app and on this page for navigation; they are not sitemap targets):

Study timeline

Pin the exam code first. Then spend the largest block of time on development with aws services (32% in the published blurb). Pair every miss with a diagram or a console click.

Six-week AWS Certified Developer DVA-C02 block — 10–14 hours/week

Weeks 1–4: walk the chapters in outline order, with a mixed set twice a week. Week 5: only the two weakest chapters. Week 6: two timed sittings in the shape the certifying body describes, then stop adding new outline. AWS Certified Developer — Associate (DVA-C02) samples on this page are for judging rationale quality, not for a full mock.

Twelve-week working-hours plan — 6–8 hours/week

Two or three evenings and one weekend block. Keep a written error log keyed to chapters, not to “I was tired.” The last fourteen days are timing and weak-chapter repair only. If you are also sitting a related exam (aws_cloud_practitioner), do not merge the decks.

Free AWS Certified Developer — Associate (DVA-C02) practice questions

A sample of 12 multiple-choice questions from the bank, with the full rationale shown.

Development with AWS Services

Which service orchestrates a state machine that calls multiple Lambdas with retries?

EventBridge scheduler cron rule
Systems Manager Automation doc
Step Functions state machine
AppFlow between SaaS apps

Answer: C — Step Functions state machine

A) EventBridge triggers events, not state. C) Correct — Step Functions defines Tasks with per-state retry policies. B) SSM Automation runs runbooks on instances. D) AppFlow moves data between SaaS apps.

Which API Gateway type is CHEAPEST and simplest for a REST-style Lambda-backed API?

REST API v1 edge-optimized
Private API with VPC link
WebSocket API stateful sockets
HTTP API v2 with Lambda proxy

Answer: D — HTTP API v2 with Lambda proxy

A) REST v1 costs more per million and adds features not always needed. D) Correct — HTTP API is cheaper and lower-latency for Lambda proxy patterns. C) WebSocket is for stateful sockets. B) Private APIs require VPC link.

Which S3 storage class transitions objects automatically between frequent and infrequent tiers?

S3 Standard single tier flat
S3 Standard-IA target tier
S3 Glacier Flexible Retrieval
S3 Intelligent-Tiering adaptive

Answer: D — S3 Intelligent-Tiering adaptive

A) Standard is single-tier at flat cost. B) Standard-IA is a target tier, not adaptive. D) Correct — Intelligent-Tiering moves objects based on access patterns. C) Glacier Flexible is archival with retrieval delay.

Security

Which service is used to store and rotate an OAuth client secret used by a Lambda?

AWS Secrets Manager rotate secret
SSM Parameter Store String param
Amazon Cognito app client secret
AWS Certificate Manager cert store

Answer: A — AWS Secrets Manager rotate secret

B) String parameters are not encrypted by default. A) Correct — Secrets Manager stores, encrypts, and rotates arbitrary secrets. C) Cognito holds its own client secret. D) ACM issues TLS certificates.

Which pattern implements ENVELOPE encryption for large payloads?

Encrypt payload directly with KMS key
PutObject with SSE-S3 default
Sign payload with asymmetric key
GenerateDataKey then local encrypt

Answer: D — GenerateDataKey then local encrypt

A) KMS Encrypt is capped at 4 KB. D) Correct — envelope encryption encrypts data with a local data key and stores the KMS-wrapped key beside it. C) Signing proves authorship, not confidentiality. B) SSE-S3 isn't envelope as described.

Cognito Identity Pools exchange a user-pool ID token for what?

A permanent IAM access key
A signed URL for CloudFront path
A refresh token for the user pool
Temporary AWS credentials via STS

Answer: D — Temporary AWS credentials via STS

A) Permanent keys are never issued to end users. D) Correct — identity pools return short-lived STS credentials scoped by an IAM role. C) Refresh tokens are managed inside user pools. B) CloudFront signing is unrelated.

Deployment

A CodeDeploy Lambda deployment with Canary10Percent5Minutes preset does what?

Shifts 5% traffic for 10 min then 100%
Shifts 10% traffic for 5 min then 100%
Deploys all at once with 5-min delay
Shifts 10% each minute over 10 min

Answer: B — Shifts 10% traffic for 5 min then 100%

B) Correct — 10% goes to the new version for 5 minutes; if alarms stay clean, 100% shifts next. A) Reverses the percentages. C) Would be All-at-once with delay. D) That describes a linear preset.

Which CodeBuild construct defines phases, artifacts, and env vars for a build?

buildspec.yml drives CodeBuild
appspec.yml is CodeDeploy artifact
template.yaml is SAM/CFN template
samconfig.toml stores CLI defaults

Answer: A — buildspec.yml drives CodeBuild

B) appspec is a CodeDeploy artifact. A) Correct — buildspec.yml governs CodeBuild install, pre_build, build, and post_build phases. C) template.yaml is SAM/CFN. D) samconfig.toml stores sam CLI defaults.

Which CloudFormation attribute retains a resource when the stack is DELETED?

UpdateReplacePolicy: Retain
DependsOn: Retain for ordering
DeletionPolicy: Retain the resource
Metadata: Retain informational

Answer: C — DeletionPolicy: Retain the resource

A) UpdateReplacePolicy governs replacements during updates, not deletion. C) Correct — DeletionPolicy: Retain preserves the resource after stack delete. B) DependsOn only orders creation. D) Metadata is informational.

Troubleshooting and Optimization

Which HTTP status code from an SDK call indicates client-side throttling by the target AWS API?

HTTP 429 Too Many Requests
HTTP 403 Forbidden
HTTP 401 Unauthorized
HTTP 500 Internal Server

Answer: A — HTTP 429 Too Many Requests

C) 401 is unauthenticated. B) 403 is access denied. A) Correct — 429 TooManyRequests signals throttling; SDKs retry with backoff. D) 500 signals a server-side error.

A DynamoDB table has a hot partition. Which redesign spreads write load MOST effectively?

Enable point-in-time recovery
Enable eventually consistent reads
Increase provisioned RCUs only
Add a random suffix to partition-key value

Answer: D — Add a random suffix to partition-key value

A) PITR is a backup feature and does not affect hot keys. D) Correct — write sharding via a suffix (e.g., 0-9) distributes writes across many partitions. C) RCUs address read throttling, not write skew. B) Read consistency doesn't rebalance writes.

DynamoDB scans are slow and expensive. Data is filtered by a non-key attribute. BEST fix?

Create a GSI on that attribute
Increase table RCUs to speed scan
Run scans only during off-hours
Enable parallel scan on the table

Answer: A — Create a GSI on that attribute

B) More RCUs only make expensive scans faster, not cheaper. A) Correct — Query on a GSI is orders of magnitude cheaper than Scan. C) Off-hours doesn't help user latency. D) Parallel scan is still expensive.

AWS Certified Developer — Associate (DVA-C02) flashcards

6 sample cards from the 120 in the bank.

CloudWatch Alarms?

Trigger actions when metric crosses threshold. Notify SNS, scale ASG, etc.

RDS Multi-AZ?

Synchronous replica in another AZ. Automatic failover. High availability.

KMS envelope encryption?

KMS key encrypts data key. Data key encrypts data. Efficient for large data.

What is AWS Developer Associate (DVA-C02)?

Cert for developers building applications on AWS. Covers SDK/CLI use, Lambda, API Gateway, DynamoDB, deployment, and troubleshooting.

API Gateway integration types?

Lambda proxy, Lambda non-proxy, HTTP, AWS service, mock, VPC link.

Redis vs Memcached?

Redis: persistence, pub/sub, complex types. Memcached: simple, multi-thread, no persistence.

Practise the full AWS Certified Developer — Associate (DVA-C02) bank

These samples are a small slice. The full bank runs flashcards, multiple choice and timed mock exams with per-chapter progress tracking, on the web and in the iOS app.

Open AWS Certified Developer — Associate (DVA-C02) →

Frequently asked

What is the AWS Certified Developer DVA-C02 exam?

How is CoStudy’s AWS Certified Developer DVA-C02 bank organised?

It holds 280 items across 4 chapters: Development with AWS Services; Security; Deployment; Troubleshooting and Optimization. Free samples on this page include the full rationale, with no account. Chapter counts in the bank are our mix; they are not a promise that the live exam uses the same item counts.

Should I study AWS Certified Developer DVA-C02 and aws cloud practitioner as one pile?

No. AWS Certified Developer DVA-C02 is its own sitting. Related banks on CoStudy (aws_cloud_practitioner, aws_ai_practitioner, aws_solutions_architect_assoc, aws_sysops_assoc, aws_solutions_architect_pro) exist because candidates confuse neighbouring credentials. Use the outline for the exam on your voucher.

Where do AWS Certified Developer DVA-C02 fees, cut scores, and pass rates live?

On AWS’s published pages — start at the AWS Certification exam guides. This page quotes a number only when we retrieved it from an official URL, and otherwise says unverified. Prep blogs that tabulate every exam’s price are often stale.

Are these real AWS Certified Developer DVA-C02 exam questions?

No. CoStudy does not have live items. The samples below are original practice written to the published outline, with rationales. Anyone selling “real exam dumps” is describing something you should not buy.

Primary source

This bank is written against AWS's published exam material. Check the AWS Certification exam guides for the current outline, fees and eligibility rules — those change, and the certifying body is the only authority on them. CoStudy is not affiliated with AWS.

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