Integration Architecture Flashcards

A developer needs to call an external REST API from Apex. Which class should be used to make the HTTP request?

Answer: HttpRequest

HttpRequest is the Apex class used to configure and send HTTP requests to external endpoints.

Which Salesforce feature allows declarative integration with external REST APIs without writing Apex code?

Answer: External Services

External Services lets admins register external REST APIs and invoke them via Flow or Process Builder without writing Apex.

What is the maximum timeout value (in milliseconds) for a single Apex callout?

Answer: 120000

Apex callouts have a maximum timeout of 120,000 milliseconds (120 seconds).

A developer is building a real-time data sync integration where Salesforce must push updates to an external system immediately after a record is saved. Which approach is BEST?

Answer: Platform Event published in a trigger

Platform Events published in an Apex trigger provide near-real-time, event-driven push integration with external systems.

When using Salesforce Connect to access external data, which protocol does the OData adapter use?

Answer: OData 2.0 or 4.0

Salesforce Connect's OData adapter supports OData 2.0 and OData 4.0 protocols to query external systems.

Which limit applies when an Apex trigger makes a callout inside a transaction that already performed DML operations?

Answer: Callouts are completely forbidden after DML in the same transaction

Salesforce prohibits HTTP callouts after DML in the same transaction to avoid uncommitted data being sent externally; use @future or queueable to decouple.

A company wants Salesforce to receive data from an external IoT device in real time using a lightweight publish/subscribe model. Which Salesforce feature is MOST appropriate?

Answer: Platform Events

Platform Events support a lightweight publish/subscribe model ideal for IoT device data ingestion in near real time.