Which of the following is cited as an example of a source not provided by the Mule XML SDK?

• A. <scheduler>
• B. <http:listener>
• C. <logger>
• D. <router>

Answer: (A)

In Mule XML DSL, a source is something that starts a flow by generating a message. The HTTP listener is a classic inbound source: it waits for an HTTP request and kicks off the flow. Inside the flow, processors like the logger and the router operate on the message after the flow has started; they are not sources themselves. The scheduler, while used to trigger actions on a schedule, isn’t presented as a source element provided by the Mule XML SDK’s inbound-source set. It’s handled via a separate scheduling mechanism, which is why it’s cited as an example of a source not provided by the Mule XML SDK.