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?
   1. A cloud-based ERP solution by Microsoft for finance and operations management.
2. Describe the D365 F&O architecture.
   1. Multi-tier architecture with application, database, and integration layers. 
3. What is the role of Azure in D365 F&O?
   1. Provides the cloud infrastructure for hosting and scaling the application.
4. Explain the concept of a model in D365 F&O.
   1. A logical grouping of elements such as forms, tables, and classes.
5. What is a package in D365 F&O?
   1. A deployment unit containing one or more models.
6. Describe the extension model in D365 F&O.
   1. 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?
   1. Facilitates data import/export and data integration.
8. Explain Lifecycle Services (LCS).
   1. A cloud-based platform for managing the application lifecycle of D365 F&O.
9. What is a form pattern in D365 F&O?
   1. Predefined layouts and behaviors to standardize form design.
10. Define AOT in D365 F&O.
    1. Application Object Tree, where all application elements are stored.

11-20: Development and Customization

1. What is X++?
   1. A programming language used in D365 F&O for business logic implementation.
2. Describe the purpose of the SysOperation framework.
   1. Manages batch processes and parallel execution.
3. What is a form data source?
   1. Defines the data source for a form, typically a table or a query.
4. Explain the use of EDT (Extended Data Types).
   1. Defines reusable data types with properties like length and alignment.
5. What is an event handler in D365 F&O?
   1. Allows subscribing to events to extend or override functionality.
6. How do you create a new table in D365 F&O?
   1. Using AOT, define table fields, keys, and properties.
7. What is a query in D365 F&O?
   1. A set of instructions to retrieve data from the database.
8. Explain table inheritance.
   1. Allows a table to inherit fields and methods from another table.
9. What is the purpose of a workflow?
   1. Automates business processes with approvals and tasks.
10. Describe the use of display methods.
    1. Methods that calculate and display data on forms or reports.

21-25: Integration and Data Management

• What is Data Management Framework (DMF)?
  • A tool for data import/export and migration.
• How do you use OData in D365 F&O?
  • For integrating D365 F&O with other systems using RESTful APIs.
• What are recurring data jobs?
  • Scheduled data import/export operations.
• Explain the concept of data packages.
  • Bundles of data entities used for data migration.
• What is the purpose of BYOD (Bring Your Own Database)?
  • Allows exporting data to external databases for advanced analytics.

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