Updated for 2026 Exam Objectives

DP-420 Practice Test

Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB

DP-420 tests whether you can actually design a production Azure Cosmos DB solution — partition key selection, multi-region replication, change feed integration, and cost-aware query optimization — not just recognize NoSQL terminology.

Our 500 scenario-based questions cover the full DP-420 blueprint across five domains: designing and implementing data models (entity modeling, denormalization, partition key selection and synthetic/hierarchical partition keys, throughput sizing, SDK connectivity, SQL query language for NoSQL, point operations vs. queries, and server-side programming with stored procedures and triggers), designing and implementing data distribution (replication strategy, consistency models, automatic and manual failover, and multi-region writes with conflict resolution), integrating an Azure Cosmos DB solution (analytical store, Fabric Mirroring, Spark and Synapse integration, Change Feed with Azure Functions, and Azure AI Search integration), optimizing an Azure Cosmos DB solution (query performance, request unit cost, integrated cache, change feed processing, and indexing policy design), and maintaining an Azure Cosmos DB solution (monitoring with Azure Monitor, backup and restore, security with RBAC and Entra ID, and DevOps processes using Resource Manager templates). Every question is grounded against live Microsoft Learn and Azure Cosmos DB documentation.

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Is this for you?

Your DP-420 exam is in the next 2-4 weeks
You've studied the concepts but aren't sure you'll pass
You want questions harder than the real exam
You want to understand why answers are correct, not just memorize

This is NOT for you if:

You're looking for braindumps or exam leaks
You haven't started studying the concepts yet
Most successful candidates start practice 2-3 weeks before their exam
Updated for the latest exam blueprint

DP-420 Exam Details

What to expect on exam day

Questions

40

Duration

100 minutes

Passing Score

700

Exam Cost

$165

Exam Domains Covered

Master all topics tested on the DP-420 exam

1

Design and implement data models

2

Design and implement data distribution

3

Integrate an Azure Cosmos DB solution

4

Optimize an Azure Cosmos DB solution

5

Maintain an Azure Cosmos DB solution

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5 Free DP-420 Questions

See how ready you are for the DP-420 exam. Each question includes a detailed explanation so you learn as you go.

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Why Practice with MSCertQuiz?

Microsoft Learn teaches concepts. We prepare you for the actual exam.

1

Deep coverage of the partition-key decisions the exam weights heaviest — synthetic and hierarchical partition keys, cross-partition query cost, and throughput distribution — not just definitions of what a partition is

2

Real integration and change-feed scenarios across Azure Functions, Fabric Mirroring, Synapse Spark, and Azure AI Search, matching how Cosmos DB solutions actually connect to the rest of Azure

3

Full production-operations content most NoSQL question banks skip: consistency-model tradeoffs, multi-region write conflict resolution, backup/restore strategy, and RBAC vs. Entra ID data-plane access

4

Every question verified against live Microsoft Learn and Azure Cosmos DB documentation before it ships, so content stays accurate as Cosmos DB features keep evolving

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What Our Users Say

“I'd used Cosmos DB casually for a year but never really understood the math behind synthetic partition keys and cross-partition query cost until I worked through these questions. Passed on my first attempt.”

VN

Victor N.

DP-420 Certified

“The multi-region writes and conflict-resolution domain was way more detailed than I expected. Consistency-model tradeoffs and RU cost impact showed up almost exactly like the real exam.”

IY

Ines Y.

Cloud Developer

“As a backend developer who mostly writes queries, the change feed and Fabric Mirroring integration questions filled real gaps between what I knew and what the exam actually tests.”

TW

Tomás W.

Passed DP-420 first try

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Official Microsoft Resources

Our practice questions are aligned with official Microsoft exam objectives. We recommend studying with Microsoft Learn first, then using MSCertQuiz to test your readiness.

View Official DP-420 Exam Details

DP-420 Frequently Asked Questions

Everything you need to know about the DP-420 Cloud-Native Applications certification

What is DP-420?
DP-420 (Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB) is a certification validating the ability to design, implement, and monitor cloud-native applications that store and manage data using Azure Cosmos DB for NoSQL.
How much does the DP-420 exam cost and how long is it?
The DP-420 exam costs $165 USD, runs approximately 100 minutes, and has a passing score of 700 out of 1000. Confirm current pricing and duration on the official certification page before booking, since exam details can shift alongside Azure Cosmos DB feature updates.
What is the passing score for DP-420?
The passing score for DP-420 is 700 out of 1000, the same threshold used across nearly all Microsoft role-based certification exams. Scoring is scaled, so 700 represents roughly 70% competency spread across all five exam domains rather than a simple raw percentage.
What topics are covered on DP-420?
DP-420 covers five domains: Design and implement data models (35-40%, the largest domain) — entity modeling, partition key design, and SQL/SDK data access; Design and implement data distribution (5-10%) — replication and consistency models; Integrate an Azure Cosmos DB solution (5-10%) — analytical workloads and Change Feed integration; Optimize an Azure Cosmos DB solution (15-20%) — query performance and indexing; and Maintain an Azure Cosmos DB solution (25-30%) — monitoring, backup, security, and DevOps.
How hard is DP-420?
DP-420 is a scenario-heavy exam that expects real hands-on experience designing and operating Azure Cosmos DB solutions, not just familiarity with NoSQL concepts in general. Candidates comfortable with data modeling often find the partition-key math (throughput and cost distribution across partitions) and the multi-region consistency/conflict-resolution scenarios the hardest, since they require quantitative production experience.
How long should I study for DP-420?
Candidates already building applications on Azure Cosmos DB should plan 4-6 weeks, focused on partition-key design math and multi-region replication. Candidates newer to Cosmos DB should plan 8-10 weeks. We recommend working through Microsoft Learn's DP-420 learning path first, then practicing with 500 scenario-based questions spread across all five domains in proportion to their exam weight, given Design and implement data models is over a third of the exam.
What are the prerequisites for DP-420?
There are no enforced prerequisites to register for DP-420, but it is designed for candidates with solid knowledge developing apps for Azure, working with Azure Cosmos DB database technologies, creating server-side objects with JavaScript, writing efficient SQL queries for the API, creating indexing policies, interpreting JSON, reading C# or Java code, and using PowerShell.
Who should take DP-420?
DP-420 is aimed at developers and architects who design, implement, and monitor cloud-native applications backed by Azure Cosmos DB, integrating the solution with other Azure services while considering security, availability, resilience, and performance. It pairs well with AZ-204/AI-103-style Azure development credentials and DP-900 (Azure Data Fundamentals) for candidates building foundational data knowledge first.

Also Preparing For

Candidates studying DP-420 often prepare for these certifications next.

AZ-900

Azure Fundamentals

Practice test →DP-900

Azure Data Fundamentals

Practice test →AZ-104

Azure Administrator

Practice test →