- Why No Official OCRES Pass Rate Exists
- What the Published Facts Do Tell You
- Reading the Passing Score Correctly
- Why a Headline Pass Rate Would Mislead Anyway
- Where the Exam Points Concentrate
- The Prerequisite Chain as a Hidden Filter
- Booking Availability and Legacy Status
- A Domain-Ordered Readiness Plan
- Frequently Asked Questions
- OMG's published OCRES Advanced materials give no pass rate, so any specific percentage you see is unsupported.
- The official minimum passing score is 45 on a 90-question, 90-minute exam, not a published 45%.
- Real-time CORBA, Dynamic Scheduling, Data Distribution Service, and Software Engineering for Real-time Systems each carry 13%.
- Advanced requires prior passes (Fundamental OCUP and Intermediate OCRES), so candidates are pre-filtered.
Why No Official OCRES Pass Rate Exists
If you searched for the pass rate of the OMG Certified Real-time and Embedded Specialist: Advanced exam (OCRES, scope OMG-OCRES-A300), you probably expected a tidy percentage. The honest answer is that none is published. Neither the Advanced page nor the OCRES FAQ on omg.org reports how many candidates sat the exam or how many passed. This article will not invent a number to fill that gap.
What the published record does support is a set of hard facts about how the exam is built and scored. Those facts let you estimate your own readiness more reliably than a population-level statistic ever could. For a broader look at difficulty, see our guide on how hard the OCRES exam is.
What the Published Facts Do Tell You
The legacy-published logistics for OCRES Advanced are specific, and they shape the difficulty more than any pass statistic would.
| Item | Published Detail |
|---|---|
| Issuer | Object Management Group (OMG), originally a joint program with UML Technology Institute |
| Delivery | Pearson VUE test-center, computer-based, multiple-choice |
| Question content | Text and UML diagrams |
| Length | 90 questions in 90 minutes |
| Minimum passing score | 45 (official figure; not a published 45%) |
| Fee on Advanced page | US$200 (page is undated) |
| Rules | Closed-book; certification is permanent for the attained level and version |
Ninety questions in ninety minutes means an average of one minute per question. That is generous for a recall question about a CORBA policy, but tight when a UML diagram annotated with schedulability stereotypes demands careful reading. Pace is a real factor, and it is one reason a flat pass-rate number would tell you little about your own odds.
For the fee picture in more detail, our OCRES certification cost breakdown walks through what the legacy page lists and what still needs live confirmation.
Reading the Passing Score Correctly
The single most misread fact about this exam is the cut score. OMG's published minimum passing score is 45. The source does not say 45%. It would be a mistake to convert that into a percentage, or to assume it maps to exactly 45 correct answers out of 90, unless OMG's own documentation states the scoring basis you are working from. Treat the published figure as published, and verify how the score is reported when you book.
This matters for study planning. Candidates who assume a low percentage threshold tend to under-prepare and skip the domains they find tedious. Candidates who read the figure carefully and acknowledge the ambiguity tend to prepare across the full scope. Our dedicated article on the OCRES passing score covers the wording in detail.
Why a Headline Pass Rate Would Mislead Anyway
Even if OMG published one, a single aggregate pass rate would be a poor guide for this particular exam, for three structural reasons.
The candidate pool is self-selected
OCRES Advanced is the top rung of a three-level ladder. People who reach it have already passed lower-level exams and, in most cases, work with real-time or embedded systems or model-driven development. A pool like that is not comparable to an entry-level exam open to anyone.
The subject matter is narrow and specification-heavy
The coverage map draws on specific OMG standards: the MDA Guide, UML profiles for schedulability and for quality of service, Real-time CORBA, CORBA/e, DDS, the Lightweight CORBA Component Model, Deployment and Configuration, and Extensible Transport Frameworks. Experience in one area does not transfer to another. A Data Distribution Service practitioner may know little about CORBA/e, and vice versa. Aggregate rates average away that unevenness.
The exam is tied to historical document editions
The coverage map names specific historical editions of each specification, and no newer syllabus has been substituted. A candidate studying the latest revision of a standard can still miss questions written against the older edition. That mismatch drives failures more reliably than raw difficulty does.
Where the Exam Points Concentrate
The coverage map's ten headings and their approximate percentages are the best predictor of where your score comes from. The percentages are explicitly approximate, so use them for prioritization, not for exact arithmetic. A full walkthrough is in our guide to all ten OCRES content areas.
| Domain | Approx. Weight |
|---|---|
| Software Engineering for Real-time Systems | 13% |
| Real-time CORBA, Dynamic Scheduling | 13% |
| Data Distribution Service | 13% |
| UML Profile for Schedulability, Performance, and Time | 11% |
| UML Profile for Quality of Service and Fault Tolerance | 10% |
| CORBA for Embedded (CORBA/e) | 10% |
| OMG MDA Guide | 9% |
| Lightweight CORBA Component Model | 8% |
| Deployment & Configuration | 7% |
| Extensible Transport Frameworks | 6% |
The Three 13% Domains
These three headings together account for roughly two-fifths of the exam, so they deserve disproportionate attention.
- Software Engineering for Real-time Systems: the foundational reasoning about timing, concurrency, and design for predictability.
- Real-time CORBA, Dynamic Scheduling: how priorities, scheduling, and resource control behave in a distributed object environment.
- Data Distribution Service: the publish-subscribe data-centric model and its quality-of-service behavior.
The Two UML Profile Domains
Together they make up about a fifth of the exam, and they are where the diagram-based questions are most likely to appear.
- Schedulability, Performance, and Time (11%): annotating models so timing properties can be analyzed.
- Quality of Service and Fault Tolerance (10%): expressing QoS and fault-tolerance requirements in UML.
The smaller domains are not safe to ignore. Deployment & Configuration (7%) and Extensible Transport Frameworks (6%) are small individually, but missing most of both costs you a meaningful slice of a 90-question exam. See our OCRES study guide for how to balance depth across them.
The Prerequisite Chain as a Hidden Filter
OMG's Advanced page lists two prerequisites: a Fundamental OCUP pass and an Intermediate OCRES pass. The program overview, however, names OCUP 2 Foundation instead. That is a terminology conflict in the published material, and it needs to be resolved before you book, not after. Contact OMG or check the booking channel to confirm which credential satisfies the Fundamental requirement in your case. Our OCRES requirements article covers the eligibility questions in more depth.
The practical effect on any pass statistic is that Advanced candidates have already cleared earlier gates. Whatever the true pass rate is, it describes a survivor population, which is another reason to ignore comparisons with entry-level exams.
Booking Availability and Legacy Status
Before building any plan around a pass rate, confirm the exam can be booked at all. OCRES remains documented on OMG's legacy pages, including the Advanced page and the FAQ. It is absent from OMG's current general certification catalog and from Pearson VUE's current OMG program page. The US$200 fee, the Pearson VUE delivery, and the 90-question format are therefore legacy-published details, not verified live offers.
Key Takeaway
Verify before you invest. Contact OMG and Pearson VUE to confirm that OCRES Advanced is currently bookable, what the live price is, and which prerequisite credential they will accept. Then commit your study time. Our exam dates and scheduling guide explains what to ask.
This status also affects how you weigh the credential's value. If you are deciding whether to pursue it, read our analysis on whether the OCRES certification is worth it alongside this article. Because the FAQ states that certification is permanent for the attained level and version, a pass retains its record, but the market recognition of a legacy credential is a separate question from whether the exam is passable.
A Domain-Ordered Readiness Plan
Since no pass rate can tell you your odds, build your own evidence. The sequence below orders study by exam weight and by how much each domain depends on the others. Adjust the pacing to your background.
Real-time Foundations and Modeling Context
- Software Engineering for Real-time Systems (13%): timing, concurrency, predictability.
- OMG MDA Guide (9%): the model-driven vocabulary the later domains assume.
UML Profiles
- Schedulability, Performance, and Time (11%).
- Quality of Service and Fault Tolerance (10%).
- Practice reading annotated diagrams quickly, since the exam mixes text and UML.
The CORBA Family
- Real-time CORBA, Dynamic Scheduling (13%).
- CORBA for Embedded (10%) and Lightweight CORBA Component Model (8%).
- Compare what each variant removes or adds relative to the others.
Data Distribution, Deployment, and Transport
- Data Distribution Service (13%).
- Deployment & Configuration (7%) and Extensible Transport Frameworks (6%).
- Finish with full 90-question timed sets, one minute per question.
The reasoning behind this order: the profiles and CORBA variants build on the general real-time and MDA concepts, so tackling those first reduces rework. Finish with timed practice because the 90-minute limit is the one condition you cannot rehearse by reading alone. Use our OCRES cheat sheet for last-week review, and test yourself on the OCRES practice test site to find weak domains before exam day.
Questions on the exam are multiple-choice, closed-book, and often built around a UML fragment or a short technical scenario. Practice identifying which specification a question is really drawing from, because distractors often borrow terminology from a neighboring standard. If you are still orienting yourself to the credential, start with what OCRES certification is, then return to the domain plan above. For hands-on question practice, the practice exams here follow the ten published headings.
Frequently Asked Questions
OMG's published Advanced and FAQ pages do not report a pass rate. Any specific percentage attributed to this exam is unsupported, and many such figures belong to unrelated credentials that share the acronym.
The official minimum passing score is 45 on a 90-question exam. The source gives it as a score, not a published 45%, so confirm how results are reported when you book. See our passing score article for details.
Software Engineering for Real-time Systems, Real-time CORBA and Dynamic Scheduling, and Data Distribution Service each carry about 13%. The coverage map's percentages are approximate, so cover all ten headings.
The exam is documented on OMG's legacy pages but is absent from the current general certification catalog and Pearson VUE's current OMG program page. Confirm availability and live pricing with OMG and Pearson VUE before you commit to studying.
No. OMG's FAQ describes closed-book rules. Plan to recall the concepts and terminology of each specification without notes, and rehearse under timed conditions.