Free Salesforce DEX660 Exam Questions

Become Salesforce Certified with updated DEX660 exam questions and correct answers

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Total 60 Questions | Updated On: Jun 16, 2026

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Question 1

Which properties are mandatory on the HTTP Connector configuration in order to use the OAuth 2.0 Authorization Code grant type for authentication?

A : External callback URL, access token URL, client ID response access token

B : Token URL, authorization URL, client ID, client secret local callback URL

C : External callback URL, access token URL, client ID, response refresh token

D : External callback URL, access token URL, local authorization URL, authorization URL, client ID, client secret

Answer: B

Question 2

When implementing a synchronous API where the event source is an HTTP Listener, a developer needs to

return the same correlation ID back to the caller in the HTTP response header.

How can this be achieved?

A : Enable the auto-generate CorrelationID option when scaffolding the flow

B : Enable the CorrelationID checkbox in the HTTP Listener configuration

C : Configure a custom correlation policy

D : NO action is needed as the correlation ID is returned to the caller in the response header by default

Answer: D

Question 3

A Mule application deployed to a standardalone Mule runtime uses VM queues to publish messages to be

consumed asynchronously by another flow.

In the case of a system failure, what will happen to in-flight messages in the VM queues that have been

consumed?

A : For nay type of queue, the message will be processed after the system comes online

B : For persistent queues, the message will be processed after the system comes online

C : For transient queues, the message will be processed after the system comes online

D : For any type of queue, the message will be lost

Answer: B

Question 4

A mule application exposes and API for creating payments. An Operations team wants to ensure that the Payment API is up and running at all times in production. Which approach should be used to test that the payment API is working in production?

A : Create a health check endpoint that listens on a separate port and uses a separate HTTP Listener configuration from the API

B : Configure the application to send health data to an external system

C : Create a health check endpoint that reuses the same port number and HTTP Listener configuration as the API itself

D : Monitor the Payment API directly sending real customer payment data

Answer: A

Question 5

The HTTP Request operation raises an HTTP CONNECTIVITY error.

Which HTTP status code and body are returned to the web client?

A : HTTP Status Code:200.Body ‘Error in processing your request

B : HTTP Status Code:500.Body ‘The HTTP CONNECTIVITY Error description

C : HTTP Status Code:500.Body ‘Error in processing your request

D : HTTP Status Code:500.Body ‘Error in processing your request

Answer: C

Page: 1 / 12

Total 60 Questions | Updated On: Jun 16, 2026

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