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。
$165
Exam Fee
50
Questions
120m
Exam Duration
700/1000
Passing Score
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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
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 chapters1
DP-420 考试概述与备考指南
30 min2
数据模型设计与实现
90 min3
解决方案优化与维护
75 min4
集成与数据分布实战
60 min5
维护与运维综合复习
45 min6
考前冲刺与实战演练
45 minCertification comparison
| Azure Cosmos DB Developer Specialty | Azure AZ-120 | Azure Virtual Desktop Specialty | |
|---|---|---|---|
| Provider | Azure | Azure | Azure |
| Level | 专家级 | 专家级 | 专家级 |
| Fee | $165 | $165 | $165 |
| Duration | 120 min | 100 min | 120 min |
| Question count | 50 | 50 | 50 |
| Validity | 1 yrs | 1 yrs | 1 yrs |
Study tips and common mistakes
💡
50 题 120 分钟，平均每题 2 分钟，合理分配时间
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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
FAQ
Frequently Asked Questions
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