Top 50 D365 Technical (F&O) Interview Q&A PART-1

Dynamics 365 Finance & Operations (D365 F&O) is a comprehensive enterprise resource planning (ERP) solution. To excel in technical interviews for D365 F&O roles, it's essential to prepare for a variety of questions. Here are the top 50 interview questions and concise answers to help you succeed.



1-10: General and Architecture

1.     What is D365 F&O?

o    A cloud-based ERP solution by Microsoft for finance and operations management.

2.     Describe the D365 F&O architecture.

o    Multi-tier architecture with application, database, and integration layers. 

3.     What is the role of Azure in D365 F&O?

o    Provides the cloud infrastructure for hosting and scaling the application.

4.     Explain the concept of a model in D365 F&O.

o    A logical grouping of elements such as forms, tables, and classes.

5.     What is a package in D365 F&O?

o    A deployment unit containing one or more models.

6.     Describe the extension model in D365 F&O.

o    Allows customization without modifying the base code, using extensions and event handlers.

7.     What is the purpose of a data entity in D365 F&O?

o    Facilitates data import/export and data integration.

8.     Explain Lifecycle Services (LCS).

o    A cloud-based platform for managing the application lifecycle of D365 F&O.

9.     What is a form pattern in D365 F&O?

o    Predefined layouts and behaviors to standardize form design.

10.                        Define AOT in D365 F&O.

o    Application Object Tree, where all application elements are stored.

11-20: Development and Customization

11.                        What is X++?

o    A programming language used in D365 F&O for business logic implementation.

12.                        Describe the purpose of the SysOperation framework.

o    Manages batch processes and parallel execution.

13.                        What is a form data source?

o    Defines the data source for a form, typically a table or a query.

14.                        Explain the use of EDT (Extended Data Types).

o    Defines reusable data types with properties like length and alignment.

15.                        What is an event handler in D365 F&O?

o    Allows subscribing to events to extend or override functionality.

16.                        How do you create a new table in D365 F&O?

o    Using AOT, define table fields, keys, and properties.

17.                        What is a query in D365 F&O?

o    A set of instructions to retrieve data from the database.

18.                        Explain table inheritance.

o    Allows a table to inherit fields and methods from another table.

19.                        What is the purpose of a workflow?

o    Automates business processes with approvals and tasks.

20.                        Describe the use of display methods.

o    Methods that calculate and display data on forms or reports.

21-25: Integration and Data Management

21.                        What is Data Management Framework (DMF)?

o    A tool for data import/export and migration.

22.                        How do you use OData in D365 F&O?

o    For integrating D365 F&O with other systems using RESTful APIs.

23.                        What are recurring data jobs?

o    Scheduled data import/export operations.

24.                        Explain the concept of data packages.

o    Bundles of data entities used for data migration.

25.                        What is the purpose of BYOD (Bring Your Own Database)?

o    Allows exporting data to external databases for advanced analytics.

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