Capgemini MS Dynamics Ax Technical Interview Questions

Capgemini MS Dynamics AX Technical Interview Questions and Answers

When preparing for a technical interview at Capgemini, candidates working on Microsoft Dynamics AX (now Dynamics 365 Finance & Operations) should be ready to showcase not only their technical expertise but also their problem-solving skills.

Capgemini interviewers typically assess your knowledge of X++ programming, AOT (Application Object Tree), architecture, customization, integration, and debugging skills. Below is a carefully structured guide with questions and answers to help you prepare effectively.

1. Basic Level Questions

Q1. What is Microsoft Dynamics AX?
Dynamics AX is an enterprise resource planning (ERP) solution from Microsoft. It helps organizations manage operations such as finance, supply chain, HR, manufacturing, and retail.

Q2. What are the main modules in Dynamics AX?

• General Ledger

• Accounts Payable / Receivable

• Inventory Management

• Procurement & Sourcing

• Human Resources

• Sales & Marketing

• Production Control

• Project Management & Accounting

Q3. What is the difference between AX 2009, AX 2012, and Dynamics 365?

• AX 2009: Older architecture, limited integration capabilities.

• AX 2012: Improved AOT structure, introduced models and services.

• Dynamics 365: Cloud-based, integrates with Power Platform, scalable and modern UI.

Q4. What is the Application Object Tree (AOT) in AX?
AOT is the central repository of all objects in AX. It contains elements like tables, classes, forms, queries, menus, and reports. Developers use AOT for creating and managing objects.

Q5. What is X++?
X++ is the proprietary object-oriented programming language of Dynamics AX. It is similar to C# and Java, used for developing business logic, customizations, and integrations within AX.

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2. Intermediate Level Questions

Q6. What are EDTs (Extended Data Types) in AX?
EDTs are user-defined data types based on system primitive data types. They add properties such as label, help text, and validation, making data consistent across tables and forms.

Q7. Explain the difference between TempDB and InMemory tables in AX.

• InMemory Table: Data is stored in memory only, fast but limited in size.

• TempDB Table: Data is stored in SQL Server TempDB, can handle large datasets.

Q8. How do you implement caching in AX?
Caching can be implemented using:

• Single-record caching (default for tables).

• Entire table caching.

• Record set caching for queries.

Q9. What is the role of AX MorphX IDE?
MorphX is the integrated development environment in AX used for designing forms, reports, tables, and writing X++ code inside the AOT.

Q10. How do you debug X++ code in Dynamics AX?

• Use the built-in debugger in AX.

• Enable breakpoints in X++ methods.

• Check Infolog messages for errors.

• Use monitoring tools like SQL Profiler for database-related debugging.

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3. Advanced Level Questions

Q11. What is the difference between RunBase and SysOperation frameworks?

• RunBase Framework: Used for creating batch jobs and dialogs in older AX versions.

• SysOperation Framework: Replaces RunBase, supports service-based architecture, enables separation of concerns (data contract, service, controller).

Q12. How do you integrate Dynamics AX with other systems?

• Application Integration Framework (AIF) for XML/WS services.

• OData services for real-time integration.

• Data Management Framework (DMF) for imports/exports.

• Power Automate & Logic Apps for cloud integrations.

Q13. What are Table Collections in AX?
A table collection groups related tables together for exporting/importing between models or environments.

Q14. How do you handle security roles in AX?
Security in AX is role-based. Each role is linked to duties and privileges that define what actions users can perform.

Q15. How do you optimize performance in Dynamics AX?

• Index tuning for tables.

• Using TempDB instead of InMemory for large datasets.

• Optimizing queries with set-based operations.

• Reducing unnecessary display methods on forms.

• Using caching effectively.

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4. Real-Time Scenario-Based Questions

Q16. If a user reports that a custom report is running slow, how would you troubleshoot?

• Check SQL query execution plan.

• Verify indexes on involved tables.

• Move temporary storage to TempDB.

• Simplify design and reduce joins.

• Use caching where applicable.

Q17. How do you migrate data from AX 2012 to Dynamics 365?

• Use Data Management Framework (DMF).

• Migrate entities using predefined templates.

• Perform validations and mapping.

• Use LCS (Lifecycle Services) for end-to-end migration.

Q18. How do you extend standard AX functionality without over-layering?

• Use Extensions (class extensions, table extensions, event handlers).

• Avoid over-layering to ensure easy upgrades.

Q19. How do you create a batch job in AX?

• Use SysOperation framework.

• Define Data Contract class.

• Create Service class with business logic.

• Define Controller class to run the operation.

Q20. How do you implement a custom workflow in AX?

• Define workflow category.

• Create workflow elements (approvals, tasks).

• Develop classes for business logic.

• Configure workflows in the AX client.

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Final Thoughts

At Capgemini, Dynamics AX technical interviews are focused not just on syntax or theory but on how well you can apply knowledge to real business problems. You should prepare by revising AOT concepts, X++ coding, SysOperation framework, integration techniques, and debugging skills.

The best way to prepare is:

• Practice common coding tasks in X++.

• Work on customizing forms, reports, and tables.

• Review performance optimization and integration scenarios.

If you can confidently explain both why and how for these questions, you’ll stand out as a strong candidate.