PD1 Integration Architecture 3 — Questions and Answers
Question 1: Which Salesforce API is BEST suited for loading millions of records from an external data warehouse into Salesforce?
- REST API
- SOAP API
- Bulk API 2.0 (Correct answer)
- Streaming API
Correct answer: Bulk API 2.0
Bulk API 2.0 is optimized for loading large volumes of data asynchronously with high throughput.
Question 2: What is the purpose of a Named Credential in Salesforce integrations?
- To store OAuth tokens inside Apex code
- To define the endpoint URL and authentication details for external callouts securely (Correct answer)
- To create inbound API endpoints for external systems to call Salesforce
- To manage connected app OAuth scopes
Correct answer: To define the endpoint URL and authentication details for external callouts securely
Named Credentials store the endpoint URL and authentication settings, removing hardcoded credentials from Apex code.
Question 3: An external system needs to subscribe to Salesforce record change events. Which API feature enables this?
- Bulk API
- Change Data Capture (CDC) (Correct answer)
- SOAP API query
- REST API polling
Correct answer: Change Data Capture (CDC)
Change Data Capture publishes change events when Salesforce records are created, updated, deleted, or undeleted, allowing external subscribers to react in real time.
Question 4: What is the recommended way to expose a custom Apex class as a REST web service?
- Use the @RestResource annotation with a urlMapping parameter on the class (Correct answer)
- Extend the webService keyword in the class declaration
- Use the @AuraEnabled annotation on the class
- Register the class as a Remote Action
Correct answer: Use the @RestResource annotation with a urlMapping parameter on the class
@RestResource(urlMapping='/myservice/*') on the class and @HttpGet/@HttpPost on methods expose Apex as a REST endpoint.
Question 5: A developer implements a callout in a Queueable class. How many callouts can a single Queueable job make?
- 1
- 10
- 100 (Correct answer)
- Unlimited within the HTTP callout governor limits
Correct answer: 100
A Queueable job can make up to 100 HTTP callouts, respecting the standard callout limits per transaction.
Question 6: When Salesforce acts as the OAuth 2.0 provider and an external app requests access, which flow is typically used for server-to-server integrations without user interaction?
- Authorization Code Flow
- Implicit Flow
- JWT Bearer Token Flow (Correct answer)
- Device Flow
Correct answer: JWT Bearer Token Flow
JWT Bearer Token Flow allows server-to-server OAuth 2.0 authentication without user interaction, using a signed JWT assertion.
Question 7: Which Remote Site Setting configuration is required before Salesforce Apex can make an outbound HTTP callout?
- The external URL must be added to Remote Site Settings or a Named Credential must be used (Correct answer)
- No configuration is needed; all URLs are allowed by default
- Only HTTPS URLs require Remote Site Settings
- Remote Site Settings are only required for SOAP callouts
Correct answer: The external URL must be added to Remote Site Settings or a Named Credential must be used
Every external endpoint URL must be whitelisted in Remote Site Settings or referenced via Named Credential before Apex callouts will succeed.
PD1 Integration Architecture 3
Which Salesforce API is BEST suited for loading millions of records from an external data warehouse into Salesforce?