MongoDB Associate Database Administrator Practice Tests

What to Expect

The MongoDB Associate Database Administrator exam costs $150 USD You'll face 66 questions in 90 minutes, giving you roughly 1 minute and 22 seconds per question. Pass/fail at 70%. Score report with domain-level breakdown delivered within a few business days.

Prerequisites and Audience

No formal prerequisites, but MongoDB recommends completing their DBA learning path on MongoDB University. You should be comfortable with MongoDB CRUD operations, understand replica sets and indexes at a conceptual level, and have some experience with MongoDB administration tasks. If you've only used MongoDB as a developer and never dealt with replication, security, or server configuration, plan for extra ramp-up time. Database administrators, DevOps engineers, and infrastructure engineers who manage self-hosted MongoDB deployments. If you're responsible for replica set configuration, performance tuning, security hardening, and backup/recovery for MongoDB, this is your certification. Note that this covers self-managed MongoDB — for Atlas-specific administration, there's a separate cert.

Staying Certified

Valid for three years. Retake the exam to recertify.

Eight domains with unequal weighting: CRUD Operations (26%), Indexes (18%), Security (15%), Replication (14%), Server Administration (11%), Monitoring (9%), Philosophy and Features (6%), and Backup and Recovery (1%). Yes, CRUD is the heaviest domain at 26% — the exam expects DBAs to deeply understand query execution, aggregation pipelines, and how operations interact with the storage engine. The tiny 1% for Backup and Recovery is surprising but accurate.

CRUD Operations

CRUD Operations carries 26% of the exam weight, making it the single most impactful domain. Allocate your study time accordingly and make sure you can answer questions on this topic confidently before sitting the exam.

Indexes

Indexes at 18% is a substantial portion of the exam. You can't afford to be weak here. Focus on understanding the core concepts and common scenario patterns.

Security

Security accounts for 15% of questions. While not the heaviest domain, it can make the difference between passing and failing. Don't neglect it.

Replication

Replication accounts for 14% of questions. While not the heaviest domain, it can make the difference between passing and failing. Don't neglect it.

Question Format

Multiple-choice and multi-select. Questions range from theoretical ("what is the role of the oplog in replication?") to practical ("given this explain() output, what index would improve this query?"). Expect configuration file snippets, mongosh commands, and replication scenarios. The CRUD domain includes complex aggregation pipeline questions.

Study Timeline

Four to six weeks for someone with existing MongoDB experience. If you're coming from a relational DBA background, add two to three weeks for MongoDB-specific concepts — especially the document model, flexible schema, and replication architecture. MongoDB University's free DBA path is designed for roughly a six-week timeline.

Top Resources

MongoDB University is the best free resource — their DBA learning path covers every exam domain. The MongoDB Server documentation is thorough and should be your reference for any topic you're unsure about. Set up a local replica set (you can do this on a single machine with different ports) and practice every administration task: initiate the replica set, add/remove members, configure authentication, create indexes, use explain(), and run diagnostic commands. Compass is useful for visualizing query execution plans.

Common Mistakes

Underestimating the CRUD domain. At 26%, it's the largest portion of the exam, and it goes deeper than basic insert/find/update/delete. You need to understand the aggregation framework, projection, and how queries interact with indexes and the WiredTiger storage engine. The other mistake is memorizing commands without understanding the underlying concepts — the exam tests why you'd choose one approach over another, not just how to type the command.

Hands-On Advice

Set up a three-member replica set on your local machine (use different ports). Practice initiating it, stepping down the primary, adding an arbiter, and reading the oplog. Create a database with sample data, build compound indexes, run queries with explain(), and practice identifying slow queries using the database profiler. Configure authentication with SCRAM and role-based access control. Run mongodump and mongorestore. If you can do all of this without consulting documentation, you're exam-ready.

Testing Options

Online proctored or at a testing center. Standard proctoring experience.

Time Management

Ninety minutes for 50 questions. The aggregation pipeline questions in the CRUD domain can be time-consuming — if you're comfortable with $lookup, $group, $unwind, and pipeline optimization, you'll move through them faster. Flag complex pipeline questions and come back to them after answering the more direct questions.

How Hard Is This Exam?

On a scale of 1 to 10, this is about a 5.5. It's an associate-level exam but covers significant breadth across eight domains. The CRUD and Indexes domains require both conceptual understanding and practical knowledge of MongoDB query execution. Replication and Security are conceptually straightforward but have enough configuration details to trip you up if you haven't done hands-on practice. Candidates with relational DBA experience find the MongoDB-specific concepts (document model, replica sets, WiredTiger) to be the main learning curve.

Pass Rate Data

MongoDB doesn't publish official rates. Community estimates place first-attempt pass rates around 60-70%. Candidates who completed MongoDB University training and set up local replica sets for practice report significantly higher success rates. The CRUD domain at 26% is often the differentiator between passing and failing.

Each Pruvos practice test mirrors the real MongoDB DBA exam: 50 questions with a 90-minute timer, distributed across eight domains — CRUD Operations (26%), Indexes (18%), Security (15%), Replication (14%), Server Administration (11%), Monitoring (9%), Philosophy and Features (6%), and Backup and Recovery (1%). We have 6 full practice tests with 300 unique questions. The CRUD domain at 26% is where most candidates win or lose — if your practice test scores are weak there, spend extra time on aggregation pipelines and query explain plans before taking more tests.

Practice tests are the single most effective study tool for the MongoDB DBA exam. They reveal your weak domains before the real exam does, and getting questions wrong in practice is how you learn. Each practice test here mirrors the real exam format: 66 questions, timed at 90 minutes, with the same 8-domain distribution.

Don't just take practice tests and check your score. Review every wrong answer and understand why the correct option is better. For the MongoDB DBA, pay special attention to CRUD Operations (26%) and Indexes (18%) questions since they carry the most weight.