DP-420 Practice Exam - Azure Cosmos DB Developer Certification
DP-420 validates deep expertise in Azure Cosmos DB — the globally distributed, multi-model database service. As applications demand low-latency data access at planetary scale, Cosmos DB specialists are increasingly valuable.
Who should take DP-420
Backend developers building globally distributed applications, database engineers working with NoSQL at scale, cloud architects designing multi-region data strategies, and application developers using Cosmos DB SDKs.
What DP-420 covers
- Data Modeling
- Partitioning
- Queries
- Security
- Performance Optimization
- Integration
Study tips for DP-420
- Master partition key design: choosing keys that distribute data and queries evenly
- Know consistency levels: Strong through Eventual, and when to use each
- Understand Request Unit (RU) provisioning, autoscale, and cost optimization
- Review change feed patterns, stored procedures, and server-side programming
DP-420 question bank
AzurePrep includes 350 DP-420 practice questions written to the published Microsoft skills outline. Questions span the full exam domain, not a recycled dump. Every question includes a detailed explanation and documentation reference so you understand why each answer is correct.
Frequently asked questions
How many questions are in the DP-420 practice exam?
The DP-420 practice exam covers Azure Cosmos DB development, data modeling, partitioning, consistency levels, and performance optimization. The current question count is shown on the DP-420 landing page.
What APIs does DP-420 cover?
DP-420 covers Cosmos DB Core (SQL) API, MongoDB API, Cassandra API, Gremlin API, and Table API. It focuses on application development using SDKs and best practices for each API.
What programming skills are needed for DP-420?
DP-420 requires proficiency in C# or Java, experience with Cosmos DB SDKs, understanding of NoSQL concepts, and knowledge of data modeling patterns for globally distributed applications.