Microsoft Dynamics Development, Extensions, and Deployment (MB6-894) Practice Exam

Which type of error is likely if an item barcode cannot be scanned, leading to event logs showing an empty UserSessionId?

1. The scanner does not have power.

2. The scanner is in offline mode.

3. The scanner cannot communicate with the server.

4. The scanner has not been logged into by a user.

The correct answer is: The scanner has not been logged into by a user.

When an item barcode cannot be scanned and the event logs show an empty UserSessionId, it indicates that there hasn’t been an active user session established for the scanner's operation. In systems that handle barcode scanning, a user must first log in to create a user session. This session is critical as it associates the scanning activity with a user and ensures that the system can track actions performed during that session. If there is no valid UserSessionId, it suggests that the scanner is not recognized as being in an active session, which is typically established upon user login. Therefore, if the scanner has not been logged into by a user, it cannot process scans or generate logs tied to a user’s actions, resulting in the reported issue. Establishing a user session is a fundamental step in the workflow of systems utilizing barcode scanners, making it essential for the functionality of scanning operations. Without an active session, scans cannot be correctly processed or logged.