Describe How to Use System Classes to Integrate with SOAP- or REST-based Web Services. PLATFORM-DEVELOPER-II Practice Questions (Page 3)

Questions 11–15

1. 11expert · medium

   A developer is integrating with a SOAP service that occasionally throws a fault due to a temporary network issue. The developer wants to implement retry logic without duplicating code. What is the best approach?

   • AWrap the call in a try-catch and retry immediately in a loop.
   • BUse a batch job to retry all failed callouts at the end of the day.
   • CCreate a helper method that accepts a callback and handles retries with a delay.
   • DUse a Platform Event to trigger a retry.
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2. 12expert · medium

   A developer is building an integration that makes a REST callout to an external system. The callout is made from a trigger, and the external system is sometimes slow. The developer wants to avoid exceeding the Apex transaction timeout and also wants to retry failed callouts. What is the best design?

   • AUse a Platform Event to trigger the callout.
   • BUse a Batch Apex job to process records and make callouts.
   • CUse a Queueable Apex job to make the callout and chain a retry if it fails.
   • DMake the callout synchronously in the trigger and catch exceptions.
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4. 13expert · medium · select all that apply

   A developer is implementing a REST callout with retry logic. The callout can fail due to network timeouts, 5xx errors, and rate limiting (429). Which of the following are valid strategies for handling these failures? Select all that apply.

   • AUse exponential backoff for 5xx errors.
   • BRetry immediately for network timeouts.
   • CRespect the 'Retry-After' header for 429 responses.
   • DLog the error and stop retrying after a maximum number of attempts.
   • EAlways retry at least 5 times for any error.
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5. 14application · medium

   A developer is writing an Apex class that makes an HTTP callout to an external service. The service occasionally takes more than 10 seconds to respond. The developer needs to ensure the callout does not fail due to timeout. What should the developer configure?

   • ASet the timeout in the Remote Site Settings.
   • BUse a batch Apex job to make the callout asynchronously.
   • CSet the timeout on the HttpRequest object to 120000 milliseconds.
   • DUse a Queueable Apex job to make the callout.
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6. 15expert · medium

   A developer is using WSDL2Apex to call a SOAP service. The service has a method that returns a large amount of data, and the developer is concerned about hitting the Apex heap size limit. What is the best way to handle this?

   • AUse the HTTP class to make a raw SOAP call and parse the response incrementally.
   • BIncrease the heap size limit in the Apex class.
   • CUse a batch Apex job to process the data in chunks.
   • DUse a Queueable Apex job to handle the callout.
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