Free Mule-Dev-201 sample questions

Correct answer: /orders: /{orderId}:

In RAML, URI parameters are defined by enclosing the parameter name in curly braces, such as `/{orderId}`. This denotes that `orderId` is a variable part of the URI path used to identify a specific resource.

Correct answer: The variable is accessible in the Subflow and retains its value.

Variables in Mule 4 are scoped to the Mule Event. Since a Subflow processes the same Mule Event as the calling flow (it runs in the same thread and context), any variables set in the calling flow are fully accessible and modifiable within the Subflow.

Correct answer: %dw 2.0 output application/json --- payload.Customers.*Customer map (item) -> { name: item.Name, email: item.Email }

The multi-value selector `.*Customer` retrieves all Customer elements as an array. The `map` function then iterates over this array to transform each item into the target JSON structure. This is the correct way to handle repeated XML elements in DataWeave 2.0.

Correct answer: The flow throws a `MULE:COMPOSITE_ROUTING` error and enters error handling.

In a Scatter-Gather router, if any route fails, the router catches the exception and, after all routes complete (or timeout), throws a `MULE:COMPOSITE_ROUTING` error. The flow processing stops and transfers to the error handler, where the composite error object contains results from successful routes and exceptions from failed ones.

Correct answer: Add a key-value pair to the Headers section: Key `Authorization`, Value `#[vars.authToken]`.

The Headers section of the HTTP Request configuration allows DataWeave expressions. Using `#[vars.authToken]` dynamically retrieves the value from the Mule variable and assigns it to the `Authorization` header key.

Correct answer: For Each scope wrapped in a Try scope with On Error Continue.

The `For Each` scope processes records sequentially. To ensure the loop continues after a failure, the processing logic inside the loop must be wrapped in a `Try` scope configured with `On Error Continue`. This catches the error for that single iteration, logs it, and allows the `For Each` loop to proceed to the next record.