MB-820 — Frequently Asked Questions
Community-vetted answers to 2 common questions about this exam.
Questions from real practice questions
Each Q&A comes from a specific community question — follow the link for its full analysis.
Applying No. Series Design Pattern in Business Central OnInsert Trigger
It is placed there to optimize performance by only fetching the setup record when a new number is actually needed, avoiding unnecessary DB hits.
Omitting it risks runtime errors if the setup record exists but the specific No. Series field is blank, as InitSeries would fail or behave unpredictably.
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