FREE
Interview Starter
Start practicing with original Dynexal questions before you decide whether you need the full pack.
₹0
- 12 practical questions
- AL & Business Central fundamentals
- Short model answers
- Senior follow-up thinking
BUSINESS CENTRAL • AL • INTERVIEW PREP
Prepare smarter.
Prepare smarter.
Answer like a developer.
Practical Business Central interview preparation from Dynexal — free questions to start, plus a premium master pack built around architecture, AL, integrations, reporting, testing, performance and senior-level scenarios.
DYNEXAL PREMIUM
Interview Master — 60 Questions
A branded, print-ready premium pack covering real developer discussions and senior scenarios.
Premium Pack
- 60 original scenario-driven questions
- Model answers + senior follow-ups
- Architecture, APIs, integrations & JSON
- Testing, security, reporting & performance
- Job Queue & background processing
- Dynexal branded PDF material
Free Interview Questions
Use these as a quick self-test. Try answering aloud before reading the model answer.
01 • AL
Why should a Business Central developer prefer extensions over modifying the base application?
Extensions isolate customizations, improve upgradeability and support controlled deployment. Table/page extensions, events and interfaces let you add behavior without directly changing standard objects.
02 • AL
What is the difference between Validate and Modify?
Validate applies field validation logic such as OnValidate. Modify writes the record and can execute OnModify. They solve different stages of record processing.
03 • EXTENSIBILITY
What is an Event Subscriber?
An Event Subscriber reacts to an event published by another object, allowing custom behavior without directly modifying the publisher's implementation.
04 • PERFORMANCE
How would you investigate a slow Business Central page?
Measure first, then inspect record retrieval, filters, FlowFields, repeated database calls, subscribers and expensive calculations. Verify the improvement after optimization.
05 • API
What is idempotency in an integration?
Repeating the same request should not create unintended duplicate business effects. A stable external identifier can be checked before creating a new business document.
06 • SECURITY
How should secrets be handled in Business Central integrations?
Do not hard-code or expose credentials through normal business data or logs. Use appropriate secure storage/configuration and restrict access.
07 • RDLC
How would you troubleshoot a blank RDLC report?
First verify the dataset has rows and expected fields, then check filters, data-item links, grouping, visibility, parameters and RDLC bindings.
08 • TESTING
What makes a good automated test?
A good test verifies meaningful behavior with controlled data, a realistic application flow and clear assertions. It should be repeatable and easy to diagnose.
09 • API
How do you handle HTTP 401, 403, 429 and 500 errors?
Distinguish authentication, authorization, rate limiting and server-side failure. Recovery should match the error rather than treating all failures identically.
10 • UPGRADE
How do you make a customization upgrade-friendly?
Prefer supported extensions, events, interfaces and APIs. Minimize coupling, document dependencies and test upgrades against supported versions.
11 • JOB QUEUE
When should a Job Queue be considered?
Use background processing for scheduled synchronization, imports, exports and recurring work that should not block a user's session. Design for retries, logging and idempotency.
12 • SENIOR
What does “production-ready” mean for a Business Central extension?
Beyond working functionality, consider security, permissions, performance, testing, upgradeability, monitoring, deployment repeatability, migration and supportability.
Ready for the full interview?
The Premium Master expands these themes into 60 original questions with model answers and senior follow-ups, including practical architecture and integration scenarios.
60 QuestionsSenior ScenariosALAPIsIntegrationsRDLCTestingPerformance
Dynexal interview material is independently authored for learning and interview preparation. It is not official Microsoft exam material.