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CertificationsAWSDVA-C02
AWS助理级云计算

AWS Certified Developer - Associate

Associate-level AWS certification focused on building, deploying, and debugging applications with AWS services. Best suited for developers working with Lambda, DynamoDB, API Gateway, and AWS SDKs.

Try the first chapter freePractice questions
65
Official exam questions
130 min
Exam duration
720/1000
Passing score
JR ACADEMY / CERTIFICATION PREP

JR Academy practice bank

748practice questions
Build your foundation10 learning chapters
Practice with purposeFocused practice · answer explanations
Test your readinessMock exams · review

748 practice questions available

OverviewLearning pathFAQReviews
01

Understand the certification

如果你每天写代码调用 AWS SDK,这张证比 SAA 更对口;如果只是配 infra,省下 $150 去考 SAA。

AWS Certified Developer - Associate(DVA-C02)是 AWS 助理级三件套里唯一从开发者视角出发的认证。它在 2023 年 2 月正式上线,替换了 2018 年的 DVA-C01 老版本,新增了对 SAM、CDK、X-Ray、EventBridge、Step Functions 的考查,砍掉了 Elastic Beanstalk 的大部分题目。

DVA 和 SAA 最容易混淆,但定位完全不同:SAA 考的是"你怎么选服务",DVA 考的是"你怎么调 API"。SAA 给你一个业务场景让你选 RDS 还是 DynamoDB;DVA 给你一段 boto3 代码让你判断为什么 ProvisionedThroughputExceededException 一直抛、应该用 exponential backoff 还是改 partition key。两张证大概 30% 内容重叠(IAM、VPC、S3 基础),剩下 70% 角度完全不同。

考纲分 4 个域:Development with AWS Services(32%)、Security(26%)、Deployment(24%)、Troubleshooting and Optimization(18%)。Lambda、DynamoDB、API Gateway 三个服务加起来占题量的一半以上,是绝对核心。其次是 SQS/SNS/EventBridge 的事件驱动模式,以及 CodePipeline/CodeDeploy/CodeBuild 这套 CI/CD 工具链。

考试 65 题(50 计分 + 15 不计分)、130 分钟、$150 美金、720/1000 通过。中文界面可以选简体中文,但不少考生反馈中文翻译生硬,建议英语过得去的直接选 English。

Exam at a glance

Exam code
DVA-C02
Provider
AWS
Format
Single choice / Multiple select
Language
English / 中文(简体) / 日本語 / 한국어
Validity
3 years
Exam fee
$150
Official certification page

Skills in focus

LambdaDynamoDBAPI GatewayS3SQSSNSCloudFormationCodePipeline

Learning outcomes

  • Earn the AWS Certified Developer - Associate credential
  • Build and deploy AWS-backed applications more confidently
  • Work comfortably with the AWS SDK, CLI, and service integrations
  • Strengthen your path toward serverless and cloud-native development roles

Who this is for

  • Software developers building on AWS
  • Backend engineers working with cloud services and APIs
  • DevOps engineers who need to understand application deployment workflows
  • Full-stack developers moving toward serverless development
  • Developers preparing for associate-level AWS certification

Before you start

  • Programming experience in at least one language such as Python, JavaScript, or Java
  • Basic familiarity with AWS core services
  • General web application development experience
  • Cloud Practitioner knowledge is helpful before starting

Consider another path if

  • 纯做 Infrastructure / Platform Engineering、几乎不写应用代码的 SRE
  • 完全没有编程经验、只想考"AWS 入门证"的人(应该考 CLF-C02)
  • 已经有 SAA 且不在 Serverless / 应用开发方向上的工程师
  • 希望靠一张证转行进云的零基础转行者(先 CLF-C02 → SAA 更稳)
02

Your learning path

10 chapters

01AWS Fundamentals ReviewFree02IAM and SecurityFree03AWS Lambda180 min04DynamoDB180 min05API Gateway150 min06SQS, SNS, and EventBridge150 min
View the full learning path

Plan your preparation

Learning hours
50h
With relevant experience
4-6 weeks
Starting from scratch
8-12 weeks
Daily study
1-2h

Included in your preparation

  • 10 structured chapters covering the developer-facing AWS topics that matter on the exam
  • 450+ practice questions with explanations
  • 3 full mock exams
  • Practical code examples instead of pure memorisation
  • Strong coverage of serverless application patterns

1. 第一阶段:把 Lambda 和 DynamoDB 写到肌肉记忆(1-2 周)

不要看视频。打开本地编辑器,用 SAM 或 Serverless Framework 搭一个 Lambda + API Gateway + DynamoDB 的 CRUD API,包含 GET/POST/PUT/DELETE 四个 endpoint。亲手处理一次 ProvisionedThroughputExceededException、亲手配一次 DLQ、亲手用 boto3 写一段 Query + FilterExpression。这一阶段做完,DVA 的核心 50% 题目你已经能凭直觉做对。

2. 第二阶段:按 4 个考试域刷题(2 周)

按 32% / 26% / 24% / 18% 的权重分配时间:Development(Lambda、DynamoDB、API Gateway、SDK 错误处理)→ Security(IAM Role、Cognito User Pool vs Identity Pool、KMS 信封加密、Secrets Manager vs Parameter Store)→ Deployment(CodeDeploy 蓝绿、SAM、CDK、CloudFormation Intrinsic Functions)→ Troubleshooting(X-Ray Sampling、CloudWatch Logs Insights、Lambda 冷启动定位)。每天 40-50 题,错题必须看 explain。

3. 第三阶段:填三个高频死亡考点(1 周)

DVA 有三个考点几乎每场必出,且容易翻车:(1) DynamoDB partition key 设计 —— 高基数字段做 PK,避免 hot partition,记住 1000 WCU/10GB 自动 split 的规则;(2) API Gateway + Lambda 集成类型 —— Proxy 集成 vs 自定义集成、Lambda Authorizer 缓存 TTL、Stage Variables;(3) CodeDeploy 部署策略 —— Canary 10Percent5Minutes、Linear、AllAtOnce 各自的 trade-off,appspec.yml 的 5 个 hook 顺序。

4. 第四阶段:模考冲刺(最后 1 周)

至少做 3 套全真模考(Tutorials Dojo 的题最贴近真实考试),稳定 75% 以上才去考。关键是看错题时问自己:"如果给我一段代码,我能不能写出来?" 不能就回去补 Lab。考试当天 130 分钟非常充裕,不用赶时间。

03

Career value

这张证到底值不值 $150

DVA-C02 是 AWS 助理级里最尴尬也最被低估的一张。说尴尬,是因为大多数招聘 JD 写"AWS Certified"时默认指的是 SAA,DVA 在 LinkedIn 上的提及率只有 SAA 的 1/3 左右。说被低估,是因为对真正每天写代码调 AWS SDK 的开发者来说,DVA 的内容比 SAA 实用得多 —— Skillsoft 2025 IT Skills and Salary Survey 给出的全球 AWS Developer 持证人均薪资是 $125,879 USD,跟 SAA 持证人差距不大。

这张证最适合的三类人:

  1. 后端工程师做 Serverless 项目:你已经在用 Lambda + DynamoDB + API Gateway 写 CRUD API,但对 partial batch failure、Provisioned Concurrency、DynamoDB 的 hot partition 这些边角概念半懂不懂。DVA 会逼你把这些坑全踩一遍。
  2. Java/Python 后端想转云原生:你有 5+ 年传统后端经验,但项目还跑在 EC2 + RDS 上。DVA 是从"云上开发"到"云原生开发"思维转换的最快路径。
  3. DevOps 工程师想往应用层走:你会写 Terraform、会配 CI/CD,但对应用代码层的 X-Ray tracing、CloudWatch Logs Insights 查询、Lambda 冷启动优化没系统认知。DVA 补这一块。

不适合考 DVA 的人:

  • 纯 Infra/SRE,不写应用代码:你的工作 90% 是写 Terraform 和 K8s manifest,DVA 里大量的 SDK API、错误处理、SAM 模板对你来说是"背了就忘"。直接考 SAA 或 SAP。
  • 想拿第一份云岗位的应届生:HR 筛简历的关键词库里 SAA 出现频率远高于 DVA。先 SAA 后 DVA 是更安全的顺序。
  • 已经有 SAA 且不写代码:DVA 和 SAA 的简历加分效果重叠度高,再考一张回报递减。

一个真实的市场观察:在澳洲和美国,同时持有 DVA + SAA 的开发者在 Serverless / Platform Engineer 方向的面试通过率明显高于只有 SAA 的人 —— 因为面试官一看 DVA 就知道你大概率手撸过 Lambda 而不只是画过架构图。

Cloud DeveloperBackend EngineerServerless EngineerDevOps EngineerFull Stack Developer云开发工程师后端工程师
澳洲
AUD 100,000 – 145,000
美国
USD 125,000 – 160,000
中国
CNY 300,000 – 550,000
新加坡
SGD 90,000 – 140,000

Preparation tips

  • **优先使用英文题干**:中文翻译机翻味重,"exclusive"、"least"、"most cost-effective" 这类关键词翻译经常失真。母语英语过得去的强烈建议英文。
  • **SDK 错误处理是高频送分题**:看到 ThrottlingException、ProvisionedThroughputExceededException、ServiceUnavailable 这类,答案 99% 是 "implement exponential backoff with jitter"。
  • **关键词敏感**:看到 "no code change" 选 Lambda Alias / API Gateway Stage Variable;看到 "blue/green with rollback" 选 CodeDeploy Canary;看到 "cross-account access" 选 STS AssumeRole;看到 "fan-out" 选 SNS → 多个 SQS。
  • **X-Ray 不只是看服务调用图**:考试爱考 Sampling Rule 配置(默认 1 req/s + 5%)、X-Ray daemon 在 EC2/ECS 上的部署方式、Lambda 启用 X-Ray 只需要在配置里勾选。
  • **多选题占比约 15%**:题干会明确写 "Choose 2" 或 "Choose 3",答案数量错了就是 0 分,不会给部分分。第一遍快速过单选,多选标记后再回头细看。
  • **ESL 加 30 分钟免费拿**:母语非英语考生在 Pearson VUE 报名页申请 ESL Accommodation,130 分钟变 160 分钟,时间宽松到可以把每道题读两遍。

Common mistakes

  • **把 Cognito User Pool 和 Identity Pool 搞反** —— User Pool 管"谁登录"(认证),Identity Pool 管"登录后能访问哪些 AWS 资源"(授权)。考试至少 2 道题考这个区分。
  • **忽略 Lambda 环境变量加密** —— 默认 Lambda 环境变量是用 AWS managed key 加密的,如果题目问"how to encrypt sensitive env vars at rest with customer managed key",答案是开启 helpers for encryption in transit + 用 CMK。
  • **DynamoDB 强一致 vs 最终一致读的 RCU 算错** —— 1 RCU = 每秒读 1 次 4KB(强一致)或 2 次 4KB(最终一致)。算 throughput 题目掉链子主要是这里。
  • **API Gateway 缓存默认是关闭的** —— 题目问"how to reduce backend Lambda invocations",答案不是"加 CloudFront"而是"enable API Gateway caching at stage level"。
  • **SAM template 和 CloudFormation 混淆** —— SAM 是 CloudFormation 的扩展,`AWS::Serverless::Function` 会被 transform 成普通 CFN 资源。考试经常给你一个 SAM yaml 让你判断生成的 CFN stack 是什么。
  • **只看 Stephane Maarek 视频不动手** —— Maarek 的课很好,但 DVA 是开发者认证,不写代码光看视频考场上一定翻车。每个核心服务至少写过一次代码再去考。
04

Before you register

What is the exam format and passing score for DVA-C02?

The DVA-C02 exam consists of 65 questions (multiple choice and multiple response), with a 130-minute time limit. The passing score is 720 out of 1000. The exam fee is $150 USD. It can be taken at Pearson VUE test centers or via online proctoring.

What are the prerequisites for DVA-C02?

AWS does not require any prerequisite certifications, but it is recommended to have at least 1 year of hands-on AWS development experience, proficiency in at least one programming language (Python/JavaScript/Java), and familiarity with core AWS services. Obtaining the AWS Cloud Practitioner certification first is recommended.

What are the key exam domains for DVA-C02?

The exam covers four domains: Development with AWS Services (32%), Security (26%), Deployment (24%), and Troubleshooting and Optimization (18%). Lambda, DynamoDB, API Gateway, IAM, and CI/CD services are frequently tested topics.

How long should I study for DVA-C02?

Developers with programming and AWS experience should plan 4-6 weeks of systematic study at 1-2 hours per day. Beginners should plan 2-3 months. Focus on Lambda, DynamoDB, API Gateway, SQS/SNS, and CodePipeline, and practice building Serverless projects hands-on.

What is the difference between DVA-C02 and SAA-C03?

SAA-C03 (Solutions Architect Associate) focuses on architecture design and service selection, while DVA-C02 (Developer Associate) focuses on code-level AWS service usage, including SDK/CLI operations, Lambda programming, DynamoDB data modeling, and API Gateway configuration. DVA-C02 is better suited for hands-on developers.

How does DVA-C02 certification benefit my career?

The AWS Developer Associate certification is one of the most recognized entry-level certifications for cloud developers. It validates Serverless, microservices, and cloud-native development skills. Certified developers earn 15-20% more on average than non-certified peers, and it is an important credential for advancing to senior cloud developer or DevOps engineer roles.

05

Learner experiences

Loading reviews…

我之前写过两年 Lambda,以为很轻松,结果第一次模考 62% 直接被打醒。最坑的是 DynamoDB 的 GSI 和 LSI —— 我一直以为 LSI 是后加的,考前才知道 LSI 必须建表时就定义。建议每个核心服务都去翻一遍官方 FAQ,AWS 考试爱出 FAQ 里的细节。

M. Zhao

Backend Engineer 4 年(Python/Django) · 847/1000 · 5 weeks

考完最大的感受是 DVA 比 SAA 更"工程师友好"。SAA 全是场景题让你选服务,DVA 会直接给你一段 IAM policy JSON 让你判断哪条权限缺了。建议备考时把 boto3 的 retry / exponential backoff、Lambda 的 partial batch response 这两段代码自己写一遍,考试至少有 3-4 道题直接对应。

Alex T.

Sydney Full Stack Dev · 792/1000 · 6 weeks

我同时考过 SAA 和 DVA,明显感觉 DVA 难一档 —— 不是知识点难,是题干信息密度大。一道题给你 5 行 CloudFormation 加 3 行 Lambda 代码再问你为什么部署失败。建议英语不好的人直接练英语题,中文翻译有时候会把关键的 "exclusive" 翻成 "包括",差一个字答案就反了。

后端 6 年转 DevOps

北京某互联网公司 · 751/1000 · 8 weeks

06

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Start with the first chapter.

2 free chapters · Full preparation from $29

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