Mulesoft MCD-Level-1 Exam Questions

What payload is returned by a Database SELECT operation that does not match any rows
in the database?

A.

false

B.

null

C.

Exception

D.

Empty Array

D.

Empty Array

What MuleSoft product enables publishing, sharing, and searching of APIs?

A. Runtime Manager

B. API Notebook

C. API Designer

D. Anypoint Exchange

Anypoint Exchange provided a way to publish , share and search API's.

What should this endpoint return?
http://dev.acme.com/api/patients?name=John&surname=Bell

A. Patient with name as John

B. Patient with surname as bell

C. Patients with either name as John or surname as Bell

D. Patients with name as John and surname as Bell

Explanation:
Query parameters are a defined set of parameters attached to the end of a url. They are extensions of the URL that are used to help define specific content or actions based on the data being passed. To append query params to the end of a URL, a ‘?’ Is added followed immediately by a query parameter.
To add multiple parameters, an ‘&’ is added in between each.
Hence coming back to question, endpoint would return Patients with name as John and (and is very important here) surname as Bell.

Refer to the exhibit.

What payload is returned from a request to http//localhost.8081/
Refer to the exhibits, what payload is returned from a request tohttp://localhost;8081/?

A.

1

B.

2

C.

3

D.

4

C.

3

Where would you create SLA Tiers for an API?

A. Exchange

B. API Manager

C. Anypoint Studio

D. In RAML specifications

B. API Manager

Explanation:
MuleSoft Doc Ref : https://docs.mulesoft.com/api-manager/2.x/policy-mule3-tutorialmanage- an-api#to-add-the-tier
Steps to create SLA Tier are as follows:
1) In API Manager, in API Administration, click a version.
2) Check that the API supports resource-level policies: On the API version details page, in Status, click Configure Endpoint, and check that Type is RAML.
3) Choose the SLA Tiers, and click Add SLA Tier. Set up limit on SLA tier.

Refer to the exhibits.

A web client submits a request to below flow. What is the output at the end of the flow?

A. String

B. Object

C. Java

D. XML

A. String

String is the correct answer as XML is of an Object type String

What DataWeave expression transforms the array a to the XML output?

A. 1.1. trains:
2.2. {(
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.9. )}

B. 1.1. trains:
2.2. a map ((engId, index) ->
3.3. train: {
4.4. TrainNumber: engId
5.5.
6.6. }
7.7. )

C. 1.1. {(
2.2. trains:
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.)}

D. 1.1. {
2.2. trains:
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.}

A. 1.1. trains:
2.2. {(
3.3. a map ((engId, index) ->
4.4. train: {
5.5. TrainNumber: engId
6.6.
7.7. }
8.8. )
9.9. )}

Explanation:
For such questions always look for Syntax:
I call it "Wrap the Map" trains:
{(
When mapping array elements (JSON or JAVA) to XML, wrap the map operations in {(..)}
-{ } are defining the object
-( ) are transforming each element in the array as a key/value pair

What happens to the attributes of a Mule event in a flow after an outbound HTTP Request is made?

A. Attributes are replaced with new attributes from the HTTP Request response (which might be null)

B. New attributes may be added from the HTTP response headers, but no headers are ever removed

C. Attributes do not change

D. Previous attributes are passed unchanged

A. Attributes are replaced with new attributes from the HTTP Request response (which might be null)

Explanation:
Attributes are replaced with new attributes from the HTTP Request response.
Attributes include everything apart from Payload/body. For ex: Headers, query parameters, URI parameters.
So, when outbound HTTP request is made, new attributes need to pass the outbound HTTP request and old attributes are replaced.
I have created below diagram to make it easy for you to understand: