- You need 40 correct answers out of 60 questions, within 90 minutes, to pass IBM's Db2 13 for z/OS DBA exam.
- Application Design and Development carries 28% of the outline; Operations and Recovery adds another 23%.
- IBM allows at most two attempts at the same exam in any 30-day period, at regular price.
- No population pass rate or exam-specific fee was verified in the sources used for this article.
The Number That Matters: 40 of 60
The IBM Certified Db2 13 for z/OS Database Administrator - Professional exam (C1000-181, credential C9006700) is delivered through the IBM Professional Certification Program with Pearson VUE. The published requirement is simple: 40 correct answers out of 60 questions, in 90 minutes, in English. The credential is listed as Live and, per IBM, replaces C0005400.
Forty out of sixty works out to roughly two-thirds correct, but that arithmetic is ours, not an IBM-published percentage. IBM states the requirement as a count of correct answers, and that is the framing worth planning around: you can miss up to 20 questions and still pass. If you are comparing exams across vendors, remember that this page concerns only the Db2 13 for z/OS DBA credential and nothing else that shares the C1000-181 label elsewhere. For a broader orientation, see What Is C1000-181?
What 40 Out of 60 Really Demands
The audience shapes the difficulty
IBM describes the intended candidate as a database administrator with three or more years of experience and strong Db2 for z/OS knowledge. The exam is not an entry-level screener. Questions are written for people who have lived with subsystems, utilities, bind processes, and recovery scenarios, so a cutoff of two-thirds correct is a meaningful bar for someone without hands-on mainframe time. We explore that in How Hard Is the C1000-181 Exam?
Why you cannot pass by specializing in one area
With six domains and a 20-question margin for error, a candidate who is excellent at one domain but weak across the rest tends to run out of room. The weights below show how quickly a weak mid-sized domain can consume your entire error budget.
Scaled score or raw count?
IBM's published requirement is expressed as correct answers. The retrieved sources do not describe any scaling, partial credit, or per-domain minimums, so do not assume any exist, and do not assume they do not. Treat the 40-correct figure as the one reliable number and prepare to clear it with margin rather than to scrape it.
Where the Points Live: Domain Weights
The six domain headings come from the official exam objectives in IBM's study guide. The percentages are published in IBM's certification-page outline (they are not printed in the study guide itself) and total 100%. Applied to a 60-question exam, the weights give a rough expectation of question counts. These counts are our estimates from the percentages, since IBM does not publish exact per-domain question numbers.
| Domain | Weight | Approx. questions of 60 (estimate) |
|---|---|---|
| Application Design and Development | 28% | about 17 |
| Operations and Recovery | 23% | about 14 |
| Performance | 17% | about 10 |
| Database Design and Implementation | 12% | about 7 |
| Planning and Migration | 12% | about 7 |
| Security and Auditing | 8% | about 5 |
Two domains, Application Design and Development and Operations and Recovery, account for 51% of the outline. If you answered every question in only those two areas correctly and none elsewhere, you would still fall short of 40, which is why breadth matters. But if you are weak in both, you are almost certainly in trouble. The full breakdown lives in C1000-181 Exam Domains: Complete Guide to All 6 Content Areas.
Application Design and Development (28%)
The largest slice of the exam. Expect the application-facing side of Db2 for z/OS to carry more weight than many infrastructure-minded DBAs anticipate.
- Be ready to reason about how application choices affect the database, not just how the database is administered.
- Review the objectives in IBM's study guide line by line; this domain is the most expensive place to have gaps.
Operations and Recovery (23%)
The second-largest domain and the one most tied to day-to-day DBA responsibility.
- Know the operational and recovery tooling in practice, not only by name.
- Scenario-style thinking helps: what is broken, what is available, what do you run first?
Planning and Migration (12%)
IBM's detailed study guide includes a Planning and Migration objective covering z/OS installation commands, including ACTIVATE and START. That detail is omitted from the condensed online bullets, so candidates who only read the web outline can miss it.
- Read the eight-page study guide, not just the summary bullets.
- Do not skip command-level material in this domain because the domain looks small.
Format, Timing, and Question Style
The exam has 60 questions in 90 minutes. IBM's official sample test demonstrates single-answer multiple-choice items. That sample does not establish every possible live item format, so avoid assuming that every operational question on exam day will look exactly like the sample. The safe preparation approach is to practice single-answer multiple-choice questions heavily while staying flexible about presentation.
- Time check: aim to reach question 30 by around the 45-minute mark so you keep a buffer for flagged items.
- Elimination first: for administrator-level questions, two options are often clearly wrong; narrowing quickly saves minutes for harder scenarios.
- No outside help: unauthorized reference materials are prohibited during the exam.
For a compact list of facts to rehearse, see the C1000-181 Cheat Sheet, and try timed questions on the main practice test site to build pacing before booking.
Building a Plan Around the Weights
Because 40 correct answers is a count and the domains are unevenly weighted, schedule study time roughly in proportion to weight, with extra time on whichever area your own experience leaves thin. A candidate from an operations background typically needs more time on application design; a candidate from an application-support background typically needs more on recovery. This is the only generic planning section in this article, and it is tied directly to the C1000-181 outline. The longer approach is in the C1000-181 Study Guide.
Application Design and Development
- Largest domain at 28%, so start here while your energy is highest.
- Work through every objective in IBM's study guide.
Operations and Recovery
- 23% of the outline and heavily tied to practical DBA work.
- Rehearse scenarios, not only definitions.
Performance
- 17% of the outline; connect it back to application and operational topics already covered.
Design, Planning and Migration, Security and Auditing
- Three smaller domains totaling 32% together.
- Cover the installation-command objective in Planning and Migration explicitly.
Timed practice and gap review
- Take full 60-question, 90-minute practice runs.
- Target a margin above 40 correct, not exactly 40.
Key Takeaway
Aim for a clear buffer above 40 in practice. A practice result sitting right at the line leaves no room for the unfamiliar wording and nerves of a proctored sitting.
Booking, Retakes, and Policy Mechanics
Delivery
IBM lists test centers and OnVUE online proctoring as program delivery options, subject to what is offered for the booking you select. Pearson VUE administers the exam. Eligibility details are covered in C1000-181 Requirements, and timing in C1000-181 Exam Dates.
Retake rules
- At most two attempts at the same exam within any 30-day period.
- Retakes are charged at the regular exam price.
- You may not retake an exam you have already passed.
Because a retake costs full price, a failed first attempt is both a scheduling and a financial setback. That is a practical argument for confirming readiness with timed practice before you book. For cost context, see C1000-181 Certification Cost.
Prerequisites and validity
IBM lists one required exam; preparation courses and practical experience are recommended rather than mandated. Continuing validity of the credential is governed by IBM's Certification Agreement, so check it directly if you need renewal specifics.
What Is Not Published
Candidates often ask for a pass rate or an exact fee. In the sources used for this article, no current exam-specific fee and no population pass rate were verified, and we will not guess at either. IBM's published figures are the ones above: 60 questions, 90 minutes, 40 correct. For what is and is not known about success rates, see C1000-181 Pass Rate, and confirm the current price on IBM's and Pearson VUE's booking pages at the time you schedule.
Likewise, whether the credential pays off depends on your employer and role, and we do not quote salary figures here. If that is your deciding factor, read Is the C1000-181 Certification Worth It? and the C1000-181 Salary Guide.
Frequently Asked Questions
IBM requires 40 correct answers out of 60 questions. The exam runs 90 minutes and is offered in English. IBM states the requirement as a count of correct answers rather than a percentage.
Application Design and Development is largest at 28%, followed by Operations and Recovery at 23% and Performance at 17%. Database Design and Implementation and Planning and Migration are 12% each, and Security and Auditing is 8%.
IBM allows at most two attempts at the same exam within any 30-day period, charges the regular exam price for retakes, and does not allow retaking an exam you have passed.
IBM's official sample test demonstrates single-answer multiple-choice questions, but the sample does not establish every possible live item format. Prepare mainly with single-answer questions and stay adaptable.
IBM describes the intended candidate as a database administrator with three or more years of experience and strong Db2 for z/OS knowledge. Courses and practical experience are recommended, not required.