PD1 Integration Architecture 4

Question 1

A developer needs to expose a legacy SOAP service from Apex. Which annotation is used on methods to include them in the generated WSDL?

Accepted Answer

webService

Answer

The `webService` keyword (not an annotation) on global methods marks them for WSDL generation in Apex SOAP services.

Question 2

An external partner needs to query Salesforce data with SQL-like syntax over HTTPS without building a SOAP client. Which API should the developer recommend?

Accepted Answer

REST API with SOQL in query parameter

Answer

The REST API accepts SOQL via the /query resource using a simple HTTP GET, making it easy for partners without SOAP clients.

Question 3

Which integration pattern should be used when Salesforce needs to call an external system but cannot wait for a synchronous response due to processing time constraints?

Accepted Answer

Fire-and-Forget

Answer

Fire-and-Forget sends a message to an external system without waiting for a response, using async mechanisms like Platform Events or @future.

Question 4

What happens if an Apex @future method that makes a callout throws an unhandled exception?

Accepted Answer

The transaction rolls back but the callout is not retried

Answer

Unhandled exceptions in @future methods roll back the transaction; there is no automatic retry or dead-letter queue.

Question 5

A Salesforce org must receive large file uploads from an external system via API. Which API supports binary file uploads natively?

Accepted Answer

REST API with multipart/form-data

Answer

The REST API supports multipart/form-data content type for binary file uploads, such as creating ContentVersion records.

(PD1) Salesforce Certified Platform Developer 1 Practice Test

(PD1) Salesforce Certified Platform Developer 1 Practice Test

PD1 Integration Architecture 4