Simulate the real MongoDB Certified DBA Associate exam with full-length timed sessions. Questions drawn proportionally from all 7 official blueprint domains — the same mix you'll face on test day.
Simulate real exam conditions
For the most realistic C100DBA simulation, start a 60 or 120-question session, put away all notes, set a timer matching the real exam duration (90 minutes), and commit to each answer before moving forward. This trains the time management and decision-making skills the real exam tests.
This free C100DBA mock exam uses the same question distribution as the real MongoDB Certified DBA Associate exam. Each session draws questions proportionally from all 7 official blueprint domains published by MongoDB, so the topic mix you see accurately reflects what you'll face on test day.
C100DBA Domain Distribution
Philosophy and Features
Server Administration
Replication
Indexing and Performance
Application Administration
Sharding
CRUD Operations
Every question is checked against the 2026 C100DBAexam objectives and published under the editorial oversight of an engineer with 12+ years' experience. These are original practice questions — not dumps — so you build real understanding rather than memorising answers.
Both the mock exam and practice test use the same question bank. The difference is in how you use them — and when to use each during your C100DBA study plan.
Practice test — for learning
Use the C100DBA practice test when you are studying a domain. Answer questions, read every explanation immediately, and build understanding. Do 10–30 questions per domain per session. This is your primary study tool for the first 4 weeks.
Go to practice test →Mock exam — for simulation
Use the C100DBA mock exam in the final 1–2 weeks before your test date. Complete a 60 or 120-question session without stopping, manage your time, then review all results at the end. This builds exam-day stamina and surfaces final weak spots.
Start 120-question mock →Try these sample questions from the mock exam bank. Commit to an answer before revealing the explanation.
A high-traffic e-commerce application requires a schema that avoids multi-document transactions where possible to ensure maximum throughput. Which MongoDB philosophy aligns best with this requirement?
Select an answer to reveal the explanation
A DBA needs to automate log rotation on a Linux-based MongoDB server without restarting the mongod process. Which signal or command should be used to ensure the current log file is archived and a new one is started?
Select an answer to reveal the explanation
In a three-node replica set with default write concern w:1, what happens to an unacknowledged write if the primary crashes immediately after receiving the write command but before replicating it to secondaries?
Select an answer to reveal the explanation
An application frequently queries a large collection using two fields: 'category' (equality) and 'timestamp' (range). Which index strategy provides the most efficient execution plan?
Select an answer to reveal the explanation
An application needs to update a user's balance. Which method ensures the operation is atomic for a single document?
Select an answer to reveal the explanation
A company stores IoT sensor data with a high ingestion rate. They use a monotonically increasing timestamp as the shard key. What is the most likely performance bottleneck for this cluster?
Select an answer to reveal the explanation
When using the find() method, which cursor modifier is used to skip a specific number of documents before returning results?
Select an answer to reveal the explanation
Answer all 7 questions to see your domain score breakdown
Sitting the C100DBA under real exam conditions is a skill in itself. Candidates who underperform often do so not because of knowledge gaps, but because of poor time management or test anxiety. Use your final mock exam sessions to address both.
The C100DBA exam lasts 90 minutes. Do not spend more than 90 seconds on any single question on the first pass. Flag difficult ones and return to them after completing the rest.
On every question, immediately eliminate obviously wrong choices. Even if you are unsure between two options, narrowing to two doubles your odds. Most C100DBA distractors contain a subtle error — re-read the scenario constraint before committing to the answer that sounds most familiar.
MongoDB writes many C100DBA questions as realistic scenarios. Read the final sentence first — it tells you what is being asked. Then re-read the scenario with the question in mind to avoid wasting time on irrelevant details.
The real C100DBA is a mental marathon lasting 90 minutes. In the week before your exam, complete at least two full timed mock sessions on separate days to build concentration stamina. If you cannot stay focused for 90 minutes in practice, you will struggle on exam day.
Questions
~222
On the real exam
Time limit
90 min
Official exam duration
Passing score
700/1000
Scaled scoring
The C100DBA uses scaled scoring — your raw percentage correct is converted to a score out of 1000. Consistently scoring above 80% on mock exams puts you well above the 700/1000 threshold, giving you a buffer for any unexpected question types on the real exam.
Yes. Courseiva provides free C100DBA mock exam questions across all official exam domains. The platform includes timed simulation, per-domain score breakdown, missed-question review, and readiness tracking. No account required — free forever, supported by advertising.
The practice test is optimised for learning: you see explanations after each question immediately. The mock exam is optimised for simulation: you answer all questions under time pressure and review at the end. Use practice tests for studying and mock exams for benchmarking.
Aim for consistent scores of 80% or above on full-length C100DBA mock exams before booking your test date. The official passing score of 700/1000 corresponds to roughly 72–75% correct answers, so an 80% buffer accounts for difficulty variation and question styles on the real exam.
Most candidates who pass C100DBA on their first attempt complete 3–5 full-length mock exams in the two weeks before their test. This is enough to identify final weak spots, build stamina, and verify readiness without over-stressing or running out of fresh questions.
No — all Courseiva questions are original, AI-assisted and checked against the public MongoDB exam blueprints, with editorial oversight from an experienced network and security engineer. Exam dumps are memorised real exam questions shared illegally. Using dumps violates your MongoDB certification agreement and can result in your certification being revoked. Our questions make you genuinely competent, not just test-day lucky.
Track your mock exam scores, see per-domain analytics, and benchmark readiness across every certification.
Sign Up FreeFree forever · Every certification included