Free DEV01 sample questions

Correct answers: Work Queues; Environment Locks

Work Queues are essential for managing the new orders. They provide a scalable and resilient way to distribute work items (orders) to multiple Digital Workers, ensuring each order is processed exactly once.

Environment Locks are required to ensure exclusive access to the inventory system. By acquiring a lock before interacting with the desktop app and releasing it after, the process prevents other concurrent sessions from interfering, thus maintaining data integrity.

Correct answer: To significantly improve the process execution speed and reduce database I/O.

Excessive stage logging, especially within high-frequency loops, creates a significant performance overhead. Each logged stage requires a write operation to the Blue Prism database. In a loop with thousands of iterations, this results in thousands of database writes, which drastically slows down process execution and increases the load on the database server. Disabling logging for non-critical, repetitive stages is a key best practice for production performance.

Correct answer: False

This is false. The best practice is to separate 'Launch' and 'Attach' logic into distinct actions. The 'Launch' action should only start the application. A separate 'Attach' action should be created to connect to an already running instance. This allows a single running application instance to be shared across multiple processes without each process attempting to launch a new instance, which is crucial for efficiency and resource management.

Correct answer: Region Mode

Region Mode is the correct choice for surface automation, which is common in virtualized environments like Citrix. It works by identifying elements based on their position and appearance on the screen, rather than their underlying technical properties. This mode allows the developer to define a rectangular area (a region) on the screen to interact with, making it ideal for applications where traditional spy modes cannot access the element tree.

Correct answer: An Action stage calling the 'Filter Collection' action from the 'Utility - Collection Manipulation' VBO.

The 'Utility - Collection Manipulation' Visual Business Object (VBO) provides a pre-built 'Filter Collection' action. This action is highly optimized and allows developers to specify complex filtering criteria in a single expression (e.g., "[Status] = 'Pending' AND [Amount] > 1000"). It is significantly more efficient and readable than manually looping through the collection, which should be avoided for large datasets.

Correct answer: The Application Modeller element for 'Click Login' relies on screen coordinates (X, Y) as key attributes.

Relying on positional attributes like X and Y coordinates is a common cause of fragility in automations, especially when they run on machines with different screen resolutions or window sizes. A change in resolution will shift the element's position, causing the attribute match to fail. The best practice is to use device-independent attributes like 'Name', 'Class Name', 'ID', or 'Window Text' that are not affected by screen resolution.

Correct answers: Launch; Terminate; Login

A 'Launch' action is fundamental for starting the application instance that the object will control.

A 'Terminate' action is crucial for cleanly closing the application and releasing system resources, especially during error recovery.

A 'Login' action is a common, reusable component for web applications that require authentication. It encapsulates the steps to enter credentials and sign in.

Correct answer: An 'Ancestor' attribute from a higher-level, stable parent element.

The UIA spy mode allows the use of 'Ancestor' attributes. By first spying a stable parent or ancestor element (like a main panel or window) and then using its attributes as an 'Ancestor' attribute for the target element, the developer creates a more specific and efficient search path. This tells Blue Prism to look for the target element only within that specific ancestor, significantly improving reliability and performance in applications with complex or dynamic element trees.

Correct answer: Design a two-process solution: Process A scans the folder and populates a Work Queue with invoice file paths. Process B gets items from the queue, uses a Terminal Automation VBO for the AS/400, handles system offline errors by deferring the queue item, uses an Environment Lock for the Excel tracker, and marks the item complete.

This design correctly addresses all requirements. Using a Work Queue (Requirement 2) enables scalable, concurrent processing. A dedicated Terminal Automation VBO is the correct way to interact with the AS/400 (Requirement 3). Deferring queue items is the standard mechanism for handling temporary system unavailability (Requirement 4). Finally, using an Environment Lock is essential for managing safe, concurrent write access to the shared Excel tracker (Requirement 5).

Correct answer: The Process and the 'VBO_Core_Utilities' Business Object. Credentials cannot be packaged.

When creating a release, the developer must explicitly add the main process and any objects it calls. While Release Manager can help identify dependencies, it does not automatically add them. Critically, credentials are environment-specific security assets and are never included in a release package. They must be created and configured manually in the target environment (Production) via the Credential Manager.