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MongoDB MongoDB Certified DBA Associate ✓ Updated May 2026

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)

Exam Code: C100DBA
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About the C100DBA Exam

The C100DBA exam, officially known as the MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4), is a vendor-specific certification from MongoDB designed for database administrators who manage MongoDB deployments. This exam validates your ability to handle core DBA tasks such as monitoring, backup and recovery, security configuration, and performance tuning in MongoDB 4.4 environments. Unlike developer-focused exams, C100DBA focuses on operational aspects, making it essential for professionals responsible for keeping MongoDB clusters healthy, available, and secure in production.

To earn the MongoDB Certified DBA Associate credential, candidates must demonstrate hands-on knowledge of MongoDB architecture, replication, sharding, and indexing strategies specific to version 4.4. The exam covers real-world scenarios like configuring replica sets for high availability, implementing authentication and authorization, and using tools like mongodump and mongorestore for disaster recovery. This certification is highly regarded in the industry because MongoDB is a leading NoSQL database used by companies such as Adobe, eBay, and Cisco for handling large-scale, document-oriented data workloads.

Passing the C100DBA exam signals to employers that you possess the operational expertise to manage MongoDB in production, reducing downtime and data loss risks. With the rise of cloud-native applications and microservices, skilled MongoDB DBAs are in high demand, and this certification provides a competitive edge. Whether you work in finance, e-commerce, or tech, mastering MongoDB 4.4 administration through this exam helps you optimize query performance, ensure data durability, and comply with security best practices in modern data pipelines.

Who Should Take the C100DBA Exam?

The C100DBA exam is intended for database administrators, systems engineers, and DevOps professionals who manage MongoDB databases in production environments. Candidates should have at least six months of hands-on experience with MongoDB 4.4, including tasks like deploying replica sets, configuring sharding, and performing backups. Prerequisites include a solid understanding of MongoDB basics, such as document structure and query syntax, as well as familiarity with Linux command-line tools and networking concepts.

Topics Covered in C100DBA

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MongoDB architecture and CRUD operations
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Indexing and query optimization strategies
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Replica sets configuration and management
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Sharding cluster setup and maintenance
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Backup and recovery methods (mongodump, mongorestore)
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Security: authentication, authorization, and encryption
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Monitoring and performance tuning with tools
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Data modeling for operational efficiency

Preparation Tips for C100DBA

Practice deploying a MongoDB 4.4 replica set with at least three members and test failover scenarios to understand election processes and write concerns.
Master backup and restore commands like mongodump, mongorestore, and mongotop by running them on sample datasets to simulate disaster recovery.
Study MongoDB security features including role-based access control, x.509 certificate authentication, and TLS encryption by configuring them in a test environment.
Review the official MongoDB 4.4 documentation for sharding architecture, focusing on chunk splitting, balancer management, and proper shard key selection.
Use monitoring tools like mongostat and mongosh to identify slow queries and analyze index usage, then practice creating compound indexes to improve performance.

Frequently Asked Questions — C100DBA

What is the passing score for the C100DBA exam?

The passing score for the C100DBA exam is typically around 65%, but this can vary slightly based on the exam version. MongoDB does not publish a fixed percentage; instead, they use a scaled scoring system. To be safe, aim to answer at least 70% of questions correctly during preparation.

How many questions are on the C100DBA exam, and what is the time limit?

The C100DBA exam consists of approximately 60 multiple-choice and multiple-select questions, and you have 90 minutes to complete it. The exam is proctored and delivered online through the MongoDB certification platform.

Can I retake the C100DBA exam if I fail?

Yes, you can retake the C100DBA exam after a mandatory 14-day waiting period if you fail. There is no limit on the number of retakes, but each attempt requires a separate exam fee. MongoDB recommends reviewing your performance report and focusing on weak areas before retesting.

How many questions are in the ExamsTree C100DBA study guide?
The ExamsTree C100DBA PDF study guide contains 132+ practice questions with detailed answer explanations, all mapped to the official MongoDB exam objectives.

Why Choose ExamsTree?

ExamsTree C100DBA Study Guide is developed by experienced certification professionals with deep knowledge of MongoDB technologies. Our team thoroughly researches each exam domain to provide comprehensive, accurate coverage.

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Exam Details
Vendor MongoDB
Questions 132+
Format PDF
Updated 5/24/2026
Cert MongoDB Certified DBA Associate
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