DEV01 Premium File
- 99 Questions & Answers
- Last Update: Oct 1, 2026
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DEV01 represents the current Blue Prism Developer certification route in 2026 materials. It sits in the Automation Development path between Associate Developer and Professional Developer and is intended for practitioners who understand how to build scalable, secure, and maintainable Blue Prism process automations rather than simply reproduce steps from a tutorial.
Blue Prism currently describes the Developer exam as 60 questions in 75 minutes with a scaled passing score of 600 or higher. There is no formal prerequisite, although completion of the Developer Learning Plan and roughly three months of hands-on experience are recommended. The published content outline assigns 35% to Object Development, 35% to Process Development, 20% to Process Implementation, and 10% to Best Practice.
The earlier AD01 Developer exam provides historical context, but candidates should use DEV01 and the current Blue Prism certifications program for live preparation. The continuity lies in the engineering skills: robust application objects, readable processes, transaction control, debugging, deployment, and operating discipline.
Object Development carries substantial weight because unreliable application interaction undermines every process that uses it. Candidates need to understand Application Modeller elements, labelling, action design, read/write/navigate behavior, wait stages, and the different ways Blue Prism can interact with desktop and browser applications.
Element attributes should identify what is stable about the target rather than simply accepting every captured property. A selector that depends on a changing window title or generated identifier may work in one session and fail in the next. Developers should be able to refine attributes and test them across realistic application states.
Wait stages are equally important. They synchronize automation with observable state, which is safer than assuming an application will always respond within a fixed delay. A good object waits for the condition that proves the next action is safe and produces a controlled exception when that condition never appears.
Processes coordinate business rules, data, queues, subprocesses, and object calls. Candidates should be comfortable with decisions, calculations, collections, loops, inputs and outputs, environment variables, and reusable pages, but the exam rewards understanding how those features create a maintainable business flow.
Process templates and naming conventions are not cosmetic. Consistent structure makes it easier for another developer or support analyst to locate initialization, transaction handling, exception paths, and cleanup. That predictability becomes increasingly valuable as organizations maintain many automations created by different teams.
Reusability should be intentional. A page or subprocess should represent a stable capability with a clear contract rather than simply removing duplicate stages. Overly generic reusable logic can become harder to understand than two small, well-named business flows.
Work queues separate the backlog of business items from the runtime sessions that process them. Developers need to know how to add items, retrieve work, mark completion, handle exceptions, use priorities and tags, and design retry behavior around the meaning of a transaction.
A queue item should contain enough information to identify the business case and support diagnosis while avoiding unnecessary sensitive data. A unique key can prevent duplicate loading, and meaningful exception details can help operations distinguish a data problem from a temporary application failure.
Retry behavior must respect external state. If an action may already have updated another system, a retry should verify that state before repeating the action. This is where queue knowledge meets process design: reliable automation depends on knowing whether work is safe to repeat.
Credentials belong in controlled credential storage rather than embedded in processes, object code, or release notes. Developers should retrieve secrets only where required and avoid writing them into stage logs. Security is part of development quality because unattended automations often hold access to business-critical applications.
Environment variables serve a different purpose: they externalize non-secret configuration such as endpoints, paths, feature settings, or queue names that can legitimately vary between environments. Using them well allows the same release to move through development, test, and production without code edits.
Candidates should understand ownership as well as mechanics. A configuration value that changes production behavior needs change control, and a credential needs a rotation process. The automation should also fail clearly when required configuration is missing instead of silently using an unsafe default.
Blue Prism exception stages allow developers to classify failures and create recovery paths, but indiscriminate recovery can hide defects or create loops. Candidates need to understand when to recover locally, when to rethrow, and how business and system exceptions should influence queue status and retry behavior.
A recovery block should restore the process to a known state. That may involve closing dialogs, navigating back to a home screen, releasing resources, or abandoning the current application session. Resuming without restoring state can create later failures that appear unrelated to the original exception.
Good exception detail is concise and diagnostic. It should identify the failed activity and relevant transaction reference without exposing credentials or unnecessary personal data. Operations benefit when messages help them decide whether to retry, fix data, or escalate an infrastructure problem.
The exam’s implementation domain covers moving from development into controlled execution. Developers should test object actions and processes, use debugging tools, understand stage logging, run processes through Control Room, configure schedules, and create release packages with the right dependencies.
Testing should deliberately cover failure paths. A process that completes one clean case does not prove that queue retries, business exceptions, missing data, application timeouts, or cleanup work correctly. Representative tests also give better estimates of transaction time and runtime-resource capacity.
Release Manager should package the intended solution rather than the entire development environment. Dependencies need to be known, environment configuration prepared, and post-deployment validation defined so operations can confirm that the release behaves correctly in production.
The 10% Best Practice domain may look smaller, but best practice appears throughout the exam. Naming, process templates, object boundaries, controlled credentials, logging, queue design, exception handling, and release discipline all reflect choices that make solutions easier to operate and change.
Candidates should understand the reason behind each convention. A rule is more useful when the developer can explain which maintenance, security, or reliability problem it prevents. That makes it easier to adapt the principle when a scenario does not match a memorized example.
The evolution of intelligent automation will continue to change interfaces and platform features, but maintainability, observability, and controlled failure remain durable engineering goals.
Collections deserve focused practice because they combine data modeling with process logic. Candidates should know how to create fields, iterate rows, filter or transform data, and pass collections between pages or objects without losing the meaning of each column. Clear schemas reduce the temptation to rely on column order or loosely named fields that later become difficult to maintain.
Environment Locks are another developer tool with operational consequences. They can prevent two sessions from using the same scarce resource or critical section at the same time, but a poorly scoped lock can reduce throughput or create avoidable contention. Developers should lock only the resource that truly needs exclusivity and ensure the lock is released on failure paths.
Browser automation should be tested across the supported browser configuration used in production. Extension state, browser updates, profiles, downloads, pop-ups, and authentication behavior can differ from a developer workstation. Reliable objects isolate those differences and expose a controlled action to the process rather than forcing business logic to handle browser-specific recovery.
Code review is useful even in a visual development environment. Another developer can spot duplicated object logic, weak wait conditions, missing exception context, unsafe logging, or queue semantics that the author has become accustomed to. A review checklist based on Blue Prism best practice turns those observations into repeatable quality control instead of personal preference.
Developers should also practice safe cleanup. A process may open applications, create temporary files, acquire locks, or set session state before a failure occurs. Cleanup logic should release what the process owns without destroying evidence or masking the original exception. This becomes especially important when schedules restart work automatically and a dirty session can affect the next transaction.
A strong DEV01 lab should include a small application or website, a reusable object, queue loading, transaction processing, controlled exceptions, environment configuration, logging, and a release. Building the complete lifecycle exposes gaps that isolated feature exercises can hide.
Candidates should also practice reading unfamiliar processes. Certification questions may ask for the most appropriate design or explain why a stage behaves unexpectedly. The ability to trace data and state through someone else’s solution is a practical skill in real teams as well as in the exam.
After Developer, the natural next step for deeper build responsibility is the current Professional Developer certification. The Professional Developer preparation material is most useful once the developer foundations in DEV01 are genuinely comfortable rather than merely memorized.
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