1500 Questions | Dynamics 365 F&O Developer (MB-500) 2026

Business Logic and Integration (22%): Developing robust business logic using X++ and managing complex integration scenarios.

Quality, Security, and Deployment (22%): Implementing security models, quality assurance through testing, and managing the lifecycle via DevOps and CI/CD.

Data and Integration (20%): Designing data models, entities, and configuring seamless data exchange between systems.

Mobile and User Experience (10%): Building and customizing mobile apps and enhancing the Unified Interface user experience.

B. Creating an extension class using the [ExtensionOf] attribute and naming it with a _Extension suffix.

C. Modifying the standard source code in the Application Explorer.

D. Creating a new table that inherits from the standard table.

E. Using a macro to inject the code at runtime.

F. Deleting the standard table and recreating it with the new method.

Correct Answer: B

Explanation:

B (Correct): Class extensions (augmentations) using the [ExtensionOf] attribute allow you to add methods and logic without touching the base code, ensuring easier upgrades.

C (Incorrect): Standard source code is read-only in the cloud-based development model.

D (Incorrect): Dynamics 365 F&O does not support table inheritance in the traditional OOP sense for extending standard tables.

E (Incorrect): Macros are used for text substitution and are not a modern or safe way to extend class logic.

F (Incorrect): Deleting standard objects would break the entire ERP system and is not possible.

Question 2: A developer needs to ensure that a specific piece of X++ logic runs only within a database transaction. Which command should be used to initiate this?

B. begin;

C. ttsbegin;

D. commit;

E. try { ... }

F. select forupdate;

Correct Answer: C

Explanation:

A (Incorrect): This is SQL syntax, not X++ syntax.

B (Incorrect): begin is not a keyword used for database transactions in X++.

D (Incorrect): ttscommit is used to end a transaction, not start one.

E (Incorrect): try/catch handles exceptions but does not inherently manage database transaction states.

F (Incorrect): forupdate is a keyword used within a select statement to lock records, but it must be wrapped in a tts block to function correctly.

Question 3: You are configuring a Continuous Integration (CI) pipeline in Azure DevOps for a D365 project. Which tool is primarily used to compile the code and generate the deployable package?

B. MSBuild.

C. X++ Form Engine.

D. Power Automate Desktop.

E. LCS (Lifecycle Services) Log Viewer.

F. Microsoft Excel Add-in.

Correct Answer: B

Explanation:

A (Incorrect): Task Runner is for client-side scripts (like Gulp/Grunt) and not for core X++ compilation.

C (Incorrect): The Form Engine renders the UI but does not handle the build/deployment pipeline process.

D (Incorrect): Power Automate is for workflow automation, not for compiling ERP source code.

E (Incorrect): LCS is used for environment management and package deployment, but not the actual compilation of code.

F (Incorrect): The Excel Add-in is a data integration tool for end-users, not a development build tool.

This is a huge original question bank

You get support from instructors if you have questions

Each question has a detailed explanation

Mobile-compatible with the Udemy app

30-days money-back guarantee if you're not satisfied