DP-420 — Azure Cosmos DB Developer Practice Test

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Description

Cosmos DB for NoSQL developers can earn Microsoft's Cosmos DB Developer Specialty with DP-420. You'll want solid Azure development experience and some server-side JavaScript. Data modeling and partitioning, plus monitoring, backup and security, make up most of the practice questions.

Free DP-420 sample questions with answers

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Stop guessing what will be on the exam. Our question banks are meticulously mapped to the official syllabus, ensuring comprehensive coverage of every domain and objective. Review the topics below to see exactly what you will be tested on.

DP-420Azure Cosmos DB Developer
Mapped
Domains Covered
Design and implement data models
Design and implement data distribution
Integrate an Azure Cosmos DB solution
Optimize an Azure Cosmos DB solution
Maintain an Azure Cosmos DB solution

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Q 50 / 5002:14
Which protocol operates at the transport layer?
A HTTP
B TCP
C ARP
D ICMP
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Correct
Option B is correct — TCP operates at the transport layer
Why?
TCP (Transmission Control Protocol) provides reliable, connection-oriented communication at Layer 4 of the OSI model.

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183
practice questions

DP-420 Questions

Study from 183 practice questions aligned to the latest DP-420 objectives.

Fundamentals
Entry-level cloud, AI, data, security, and platform literacy
Associate
Role-based credentials for Azure, M365, Security, Data, and Power Platform
Expert
Advanced architecture and engineering across Azure, Security, and Power Platform

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DP-420 is part of the Microsoft certification pathway. See how this exam connects to your long-term career goals.

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Get all new and old versions of the Azure Cosmos DB Developer practice test so you have multiple question sets to study from. When objectives change, your question pool updates automatically.

Why is TCP connection-oriented?
TCP uses a three-way handshake (SYN, SYN-ACK, ACK) to establish a reliable session before data transfer begins...

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Frequently asked questions

Everything you need to know about prepping for DP-420.

What is the DP-420 exam format?
Official format is typically 40-60 questions, 120 minutes, passing score 700/1-1000. Available in 10 languages.
How much does the DP-420 exam cost?
The official exam fee is $165 USD. Pricing may vary by country, currency, or voucher.
What topics are on the DP-420 exam?
The DP-420 syllabus is organized into 5 domains. (Last updated: 2025-01-27)
  • Design and implement data models (40%)
  • Maintain an Azure Cosmos DB solution (28%)
  • Optimize an Azure Cosmos DB solution (17%)
  • Integrate an Azure Cosmos DB solution (8%)
  • Design and implement data distribution (7%)
How should I prioritize the DP-420 syllabus?
Start with the highest‑weight domains first: Design and implement data models, Maintain an Azure Cosmos DB solution, Optimize an Azure Cosmos DB solution. Then work down the list and use practice questions to validate each topic.
What are the prerequisites for DP-420?
Recommended experience includes Solid knowledge and experience developing apps for Azure. Use the syllabus domains above to identify any gaps before you schedule the exam.
How to study for the DP-420 exam?
Use the syllabus domains to build your plan, then combine focused practice questions with official resources:
  • Official resource: Get started with Azure Cosmos DB for NoSQL
Is the DP-420 exam active in 2026?
Current status: ACTIVE. Last content update: 2025-01-27.
How long is the DP-420 certification valid?
Certification validity is typically 2 years. Recertification options vary by vendor and program.
When was DP-420 released and when does it retire?
Released: 2021-11-09.
How many DP-420 practice questions are included on ExamJungle?
This DP-420 practice test includes 183 practice questions in the simulator, with explanations and study tools.
Is this the real DP-420 exam?
No, but the questions mirror the format, difficulty, and objectives so you are fully prepared.
How long do I get access?
Access depends on your plan, with ongoing updates to the DP-420 pool.
Can I study on mobile?
Yes, the simulator is optimized for desktop and mobile so you can keep studying anywhere.
Does this include explanations?
Yes, detailed explanations are included for every question.

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