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Certifications/Azure/Azure Cosmos DB Developer Specialty
Azure专家级📊 数据

Microsoft Certified: Azure Cosmos DB Developer Specialty (DP-420)

验证您设计和实现 Azure Cosmos DB 解决方案的专业技能。涵盖数据建模、分区策略和性能优化。

Start PracticeBrowse Learning Path
50
Questions per exam
121
Question bank total
120m
Exam Duration
700/1000
Passing Score
$165
Exam Fee

At a glance

121 questions
Best forAzure Data Developer — 在 Azure 上设计 NoSQL 数据层, Backend Developer — 做高并发、全球分布式应用
Prep pace6-8 weeks with experience
Course pack6 chapters · 40 hours
Learner signal0 enrolled · 0/5
Exam Guide

What this certification covers

This page is structured for quick scanning first: exam format, fit, prep time, and the actual study scope.

You will work with

Azure Cosmos DBCore (SQL) APIMongoDB APIPartition Key DesignRequest Units (RU/s)Consistency LevelsChange FeedStored Procedures / TriggersAzure Synapse LinkGlobal DistributionMulti-Region WritesIndexing PolicyCosmos DB SDK (C# / Node.js / Python)Azure Functions IntegrationPeriodic / Continuous BackupRBAC / Private EndpointCustomer-Managed Keys

After preparation

  • 通过 Microsoft DP-420 Azure Cosmos DB Developer Specialty 认证考试
  • 独立设计多对多关系、热点避让、跨文档查询的 Cosmos DB 数据模型
  • 选型合理的 partition key 避免生产热点（会对比真实业务场景的多种方案）
  • 在 5 档一致性级别之间做 trade-off，结合延迟、可用性、RU 成本

Exam details

Exam Code
DP-420
Provider
Microsoft Azure
Duration
120 minutes
Question Count
50 questions
Passing Score
700/1000
Validity
1 years
Exam Fee
$165 USD
Question Types
Single choice, Multiple select, True/False, Drag and drop
Languages
English, 中文(简体), 日本語, 한국어, Français, Deutsch, Español
Official Page
Open AWS page

Who should take it

Good fit

  • Azure Data Developer — 在 Azure 上设计 NoSQL 数据层
  • Backend Developer — 做高并发、全球分布式应用
  • Solution Architect — 评估 SQL 数据库 vs Cosmos DB 选型
  • 已持 Azure Fundamentals（AZ-900）或 Developer Associate（AZ-204）的候选人
  • 有 MongoDB / Cassandra / DynamoDB 背景要转 Cosmos DB 生态

Before you start

  • 12+ 个月 Azure 开发或数据库工作经验
  • 熟悉至少一种 NoSQL 数据库（MongoDB / Cassandra / DynamoDB）
  • 能写 C# / Python / Node.js 任一语言并调过 SDK
  • 理解分布式系统的 CAP 定理与一致性概念
  • 有 Azure 订阅（可用 Cosmos DB Free Tier：1000 RU/s + 25GB 永久免费）
  • 推荐先过 Microsoft Learn DP-420 官方学习路径（12 个模块）

Study preparation

With hands-on AWS

6-8 weeks

From scratch

10-14 weeks

Daily pace

1-2 hours/day

Learning path preview

6 chapters
1
DP-420 考试概述与备考指南
30 min
2
数据模型设计与实现
90 min
3
解决方案优化与维护
75 min
4
集成与数据分布实战
60 min
5
维护与运维综合复习
45 min
6
考前冲刺与实战演练
45 min

Certification comparison

Azure Cosmos DB Developer SpecialtyAzure AZ-120Azure Virtual Desktop Specialty
ProviderAzureAzureAzure
Level专家级专家级专家级
Fee$165$165$165
Duration120 min100 min120 min
Questions per exam505050
Validity1 yrs1 yrs1 yrs

Study tips and common mistakes

💡

50 题 120 分钟，平均每题 2 分钟，合理分配时间

💡

及格分 700/1000，不确定的题先标记跳过，回头再做

💡

排除法非常有用 — 先排掉明显错误的选项，剩下的再分析

💡

多选题会告诉你选几个，仔细看题目要求

⚠️

没有读完所有选项就选答案 — 题目经常有"最佳"答案和"正确但不最佳"的干扰项

⚠️

备考只刷题不理解原理 — 考试场景题需要理解底层概念

⚠️

忽略时间管理 — 在难题上卡太久，导致后面简单题没时间做

Frequently Asked Questions

If you plan to take Azure Cosmos DB Developer Specialty, start with real practice.

121 questions, chapter-by-chapter learning, mock exams, wrong-question review, and AI tutor support live in the exam page.

Go to exam prep

From $39 · 2 free chapters

Student reviews

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EXAM PREP

Azure Cosmos DB Developer Specialty Question Bank

Chapter-by-chapter learning + mock exams + AI tutor

121
Questions
6
Chapters
40h
Study
AI
Tutor
  • First 2 chapters free
  • Real exam format mock tests
  • AI-powered wrong answer review
  • Chapter progress tracking
From $39
Start Practice Now

Prep snapshot

Study chapters6
Practice questions121
Estimated hours40h

What is inside

  • 按 Microsoft DP-420 官方 Skills Outline 五大领域切章节（数据建模权重最大 35-40%）
  • 121 道练习题偏 Partition key 选型和 RU/s 调优场景（不是知识点死记题）
  • 数据建模章节讲透 Embedded vs Referenced 决策框架，避免生产后想改分区键的悲剧
  • 一致性级别章节给出 5 档（Strong / Bounded Staleness / Session / Consistent Prefix / Eventual）的真实应用场景对比
  • Change Feed 章节给出事件驱动架构实战（Cosmos DB → Azure Functions → 下游消费）