Describe How to Use System Classes to Integrate with SOAP- or REST-based Web Services. PLATFORM-DEVELOPER-II Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A developer is building an Apex REST callout to send JSON data to an external API. The API requires a custom header 'X-API-Key' for authentication. What is the correct way to set this header in Apex?

   • Areq.setBody('X-API-Key', 'abc123');
   • Breq.setEndpoint('X-API-Key', 'abc123');
   • Creq.setMethod('X-API-Key', 'abc123');
   • Dreq.setHeader('X-API-Key', 'abc123');
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2. 2foundation · easy

   Which Apex class is used to send an HTTP request to a REST-based web service?

   • AHttpResponse
   • BHttpCallout
   • CRestRequest
   • DHttpRequest
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4. 3application · medium

   A developer needs to send a POST request with a JSON payload to an external API. The API expects the payload to be in a specific format. What is the correct way to set the request body in Apex?

   • Areq.setBody('{"name":"John"}');
   • Breq.setHeader('Content-Type', 'application/json'); req.setBody('{"name":"John"}');
   • Creq.setBody('name=John');
   • Dreq.setEndpoint('{"name":"John"}');
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5. 4application · medium

   A developer is integrating with a SOAP service that requires a session ID in the SOAP header. The developer has generated the Apex stubs. What is the correct way to include the session ID in the call?

   • AUse the generated stub's input header class to set the session ID.
   • BAdd the session ID to the endpoint URL.
   • CUse a Named Credential to store the session ID.
   • DSet the session ID in the HttpRequest header.
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6. 5foundation · easy

   When a callout to an external service fails due to a transient network error, what is a common strategy to handle this?

   • ALog the error and never retry
   • BImmediately throw an exception and stop processing
   • CIgnore the error and continue with the next record
   • DRetry the callout after a short delay
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