MB-820 study plan

Create an AL table and table extension with at least three fields, one key, and one validation trigger.

Build a card page and a list page for the new table, then compile the extension with zero errors.

Trace the relationship between the table and page by opening the page and creating a record.

Write a short mapping note that labels each created object by its Business Central object type.

Write OnInsert, OnModify, and OnValidate triggers that enforce two business rules.

Create a codeunit with public procedures and call it from a page action.

Implement an event publisher and an event subscriber to extend behavior without modifying base objects.

Use filters or RecordRef to query records inside a procedure and return a result.

Design and build a report with a data item and layout that groups records.

Create a query and consume its result from AL code.

Build an XMLport that exports and imports a simple record set.

Use Dictionary and List collections to aggregate data in a codeunit.

Implement an interface and two codeunits that implement it.

Use Codeunit.Run and TryFunction to handle recoverable errors without crashing the session.

Serialize and deserialize JSON by using JsonObject and JsonArray.

Write a test codeunit with Assert statements that covers two procedures.

Describe Business Central architecture tiers and deployment models in a written summary.

Compare cloud sandbox, on-premises, and Docker-based development environments.

Create a deployment checklist covering app.json, dependencies, permission sets, and runtime version.

Deploy the week 4 extension to a sandbox and verify that it installs and runs.

Configure VS Code, the AL Language extension, launch.json, and symbol download for debugging.

Use Git to create a branch, commit an AL change, and review the diff.

Expose a page as an OData or API endpoint and query it successfully.

Implement an outbound HTTP call from AL to a mock endpoint and parse the response.

Document the endpoint and HTTP call with example requests in a README.

Build an end-to-end AL feature that calls an external API, stores results, and handles failures.

Combine HttpClient, JsonObject, and error handling in one integration flow.

Write an integration test codeunit that uses a mock response.

Document retry and idempotency behavior for the integration.

Complete a full timed mock exam and score each domain separately.

Review every missed item and write a corrective note for each weak area.

Re-run all prior deliverables from a clean environment.

Explain Business Central architecture and tooling to a peer in ten minutes.