MB-820 Exam Cram: Error Handling, RAD, Debugging, Permissions, and Application Areas
Master the essential developer tools and techniques in Business Central! This comprehensive guide covers five critical MB-820 exam topics: Try Functions and Collectible Errors for robust error handling, RAD.json for rapid development cycles, Snapshot Debugging for production troubleshooting, Entitlements and Permission Sets for security architecture, and extending Application Areas for customized user experiences. Learn from real Microsoft code examples and prepare to pass your certification with confidence.
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About the Book
MB-820 Exam Cram: Error Handling, RAD, Debugging, Permissions, and Application Areas
A Complete Guide for MB-820 Certification
Overview
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This comprehensive guide covers five essential topics for Business Central developers preparing for the MB-820 certification exam. Drawing from real Microsoft base application code, official documentation, and practical implementation patterns, this book provides everything you need to master error handling, rapid development workflows, debugging techniques, security architecture, and user experience customization.
What You'll Learn
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Chapter 1-2: Error Handling
Master the art of graceful error handling in AL code. Learn how Try Functions catch and handle exceptions, returning Boolean values that let you control the user experience when things go wrong. Discover Collectible Errors introduced in BC19, which allow your code to gather multiple validation issues and present them all at once instead of stopping at the first problem. Understand the ErrorInfo data type, the ErrorBehavior attribute, and the complete Collectible Errors API.
Chapter 3: Rapid Application Development (RAD)
Accelerate your development cycles with RAD publishing. Understand how the rad.json file tracks changes, which modifications trigger updates, and critically important: what changes are NOT included in RAD builds. Learn the keyboard shortcuts, understand the limitations around translations and permissions, and discover best practices to avoid losing your work.
Chapter 4: Debugging and Deployment
From standard F5 debugging to production snapshot debugging, this chapter covers all the tools available to Business Central developers. Configure launch.json for different scenarios, understand attach debugging for live sessions, and master snapshot debugging for production troubleshooting. Learn about SQL statistics in the debugger and the various deployment methods for your extensions.
Chapter 5-6: Permissions and Entitlements
Design robust security architectures using permission sets and entitlements. Understand the layered permission model from licenses through entitlements to object permissions. Create permission set hierarchies, define entitlements for different license types, and leverage inherent permissions for elevated access during code execution. Learn when to use InherentPermissions and InherentEntitlements properties.
Chapter 7: Extending Application Areas
Customize user experiences through application areas. Create custom application areas, register them with experience tiers, and control which features appear for Essentials versus Premium users. Understand ApplicationArea property inheritance and best practices for tagging controls.
Key Features
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- Real code examples from the Microsoft base application
- Step-by-step implementation patterns
- Comprehensive coverage of exam topics
- Keyboard shortcuts and quick reference tables
- Best practices and anti-patterns
- 20 practice questions with detailed explanations
- Hands-on exercises for each major topic
- Complete reference section with official documentation links
Who This Book Is For
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- Developers preparing for the MB-820 Business Central Developer certification
- AL developers wanting to improve their error handling skills
- Consultants implementing security and permissions
- Technical architects designing Business Central solutions
- Anyone wanting to understand RAD, debugging, and application areas
Prerequisites
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- Basic understanding of AL programming language
- Familiarity with Business Central development environment
- Access to Visual Studio Code with AL Language extension
- A Business Central sandbox environment for practice
About the Series
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This is the eleventh book in the MB-820 Exam Cram series, which provides comprehensive coverage of all major certification topics. Each book combines theoretical knowledge with practical examples from the Microsoft base application, ensuring you understand both the concepts and their real-world implementations.
Page Count: Approximately 100 pages (formatted)
Format: Markdown (easily converted to PDF, EPUB, or print)
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MB 820 Exam Cram: Complete Guide
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Author
About the Author
Silviu Virlan is a Microsoft MVP for Business Applications (awarded multiple times, including a second recognition in recent years), MCP (Microsoft Certified Professional), and a highly respected Dynamics 365 Business Central expert.
With over 12 years of hands-on experience in Dynamics NAV and Business Central, Silviu specializes in AL development, extensions, integrations, performance optimization, and modern AI-driven analytics. He served as a Developer Lead or Technical Architect in Dynamics 365 Business Central development teams for various Microsoft Partners in USA and Canada.
Since 2017, Silviu has been a dedicated contributor to the global Business Central community. He shares practical knowledge and deep technical insights through:
- His popular blog at www.svirlan.com, featuring tutorials, release wave overviews, and best practices.
- The Business Central Musings YouTube channel (@BusinessCentralMusings), home to well-received educational series such as: - "Let's pass MB-820" – a comprehensive certification prep playlist - "What's new in Business Central" – covering 2023, 2024, 2025, and beyond release waves
In 2024, Silviu authored the book "Beyond the Ledgers: Cutting-edge Data Insights with Business Central and AI", a practical guide that helps users and developers unlock powerful analytics, automation, and AI capabilities within Business Central.
A sought-after speaker, you can often find Silviu presenting at major technical conferences including Directions, DynamicsCon, and Community Summit, where he delivers sessions on cutting-edge Business Central topics, from AL language features to advanced integrations and user experience enhancements.
Through his content, speaking engagements, and community leadership, Silviu continues to empower developers, consultants, and partners to build better solutions in the ever-evolving world of Dynamics 365 Business Central.
Contents
Table of Contents
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