Exam Certified Platform Developer II topic 1 question 54 discussion

REST API is more than enough to get the Account information by its ID, there is no need to expose a REST WEB SERVICE from Salesforce

I'd say D https://trailhead.salesforce.com/content/learn/modules/apex_integration_services/apex_integration_webservices "By making your methods callable through the web, your external applications can integrate with Salesforce to perform all sorts of nifty operations." A web page that needs to retrieve account info from SF sounds like an external application to me,

A, the ootb REST API can be used

I said D myself, but I think the confusion comes from that cast that I thought 'Rest API' implied that Salesforce was using a callout to an external service whereas the external service is using the API (without a custom class) to get the information. The reason why it mentions Javascript is because REST supports JSON whereas SOAP does not, it only supports XML.

REST API is enough

Answer is A. Apex REST Web Service is only used if you need to perform custom logic.

The correct is A you don't need to expose the apex rest service and write a test class for just retrieving an account, just call a rest API https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/dome_get_field_values.htm

Correct is D, because its a call from web to SF. If it was a call from SF to web, it woud be A

Correct is D because from the web page you need to access Sf