PL 400 Study Guide 2026
Everything you need to pass the PL 400 exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 PL 400 Exam Format at a Glance
📚 PL 400 Topics to Study (71)
✍️ Sample PL 400 Questions & Answers
1. A developer needs to run custom logic automatically whenever a record is deleted in Dataverse, without user interaction. What is the best approach?
A plug-in registered on the Delete message executes synchronously in the Dataverse pipeline whenever a delete operation occurs.
2. A model-driven app form has an OnSave event handler that calls event.preventDefault(). What is the effect?
Calling preventDefault() on the save event object cancels the save operation, preventing the record from being written to Dataverse.
3. A developer needs to query Dataverse data using standard SQL syntax via an external tool. Which feature enables this?
The TDS endpoint exposes Dataverse as a SQL data source, allowing SQL queries via tools like SSMS or Power BI.
4. What is the most important professional competency for PL 400 certification in custom connectors?
Professional competency requires both deep knowledge of the subject matter and the ability to apply that knowledge in practical situations.
5. Which approach best demonstrates mastery of custom connectors in PL 400 practice?
True mastery involves understanding underlying principles well enough to apply them to new and unfamiliar situations with professional judgment.
6. Which HTTP verb must a webhook trigger's unsubscribe operation use to tell the external service to stop sending notifications?
The unsubscribe operation must use DELETE to remove the webhook registration from the external service when the flow is deleted or disabled.