Mulesoft MCD-LEVEL1 Online Practice Questions and Exam Preparation

Mulesoft MCD-LEVEL1 Online Questions & Answers

• Question 171:

  A RAML example fragment named StudentExample.raml is placed in the examples folder in an API specification project. What is the correct syntax to reference the fragment?

  A. examples: !include StudentExample.raml
  B. examples: #import StudentExample.raml
  C. examples: !include examples/StudentExample.raml
  D. examples: #import examples/StudentExample.raml
  C. examples: !include examples/StudentExample.raml

  ---

  Explanation/Reference:

  To include property. To keep the API definition concise, you can include external content, such as documentation, schemas, and frequently used patterns outside the definition itself. The parser interprets !include as if the content of the externally-hosted file or a URL were declared in-line. To use the fragments in RAML you have to include the exact path(copy the path) of that fragment you want to use as shown below Option 3 is the correct as correct syntax is examples: !include examples/StudentExample.raml Reference: https://docs.mulesoft.com/api-manager/1.x/tutorial-design-an-api

• Question 172:

  Refer to the exhibits.

  

  A web client submits a request to http://localhQst:8081 /flights. What is the result at the end of the flow?

  A. "string"
  B. "Java"
  C. "object"
  D. "XML"
  A. "string"

• Question 173:

  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/Reference:

  MuleSoft Doc Ref : https://docs.mulesoft.com/api-manager/2.x/policy-mule3-tutorial-manage-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

• Question 174:

  A company has defined two RAML fragments, Book Data Type and Book Example to be used in APIs.

  What would be valid RAML to use these fragments ?

  

  A. 1. #%RAML 1.0 2. title: Books 3. types: 4. Book: ABC/Examples/bookDataType.raml 5. /books: 6. post: 7. body: 8. application/json: 9. type: Book 10. examples: 11. input: ABC/Examples/bookExample.raml 12. responses: 13. 201: 14. body: 15. application/json: 16. example: 17. message: Book added
  B. 1.#%RAML 1.0 2.title: Books 3.Book: !include bookDataType.raml 4./books: 5. post: 6. body: 7. application/json: 8. type: Book 9. examples: 10. input: !include bookExample.raml 11. responses: 12. 201: 13. body: 14. application/json: 15. example: 16. message: Book added
  C. 1.#%RAML 1.0 2.title: Books 3.Book: bookDataType.raml 4./books: 5. post: 6. body: 7. application/json: 8. type: Book 9. examples: 10. input: bookExample.raml 11. responses: 12. 201: 13. body: 14. application/json: 15. example: 16. message: Book added
  D. 1.#%RAML 1.0 2.title: Books 3.Book: bookDataType.raml 4./books: 5. post: 6. body: 7. application/json: 8. type: Book 9. examples: 10. input: bookExample.raml 11. responses: 12. 201: 13. body: 14. application/json: 15. example: 16. message: Book added
  D. 1.#%RAML 1.0 2.title: Books 3.Book: bookDataType.raml 4./books: 5. post: 6. body: 7. application/json: 8. type: Book 9. examples: 10. input: bookExample.raml 11. responses: 12. 201: 13. body: 14. application/json: 15. example: 16. message: Book added

  ---

  Explanation/Reference:

  *

  RAML file contains lot of information that could be considered as "not API-describing".

  Sort of "economy-class" members.

  Equally important, but not necessarily part of the main RAML file.

  *

  Through !includes, RAML allows us to build file-distributed API definitions, which is not only useful to encourage code reuse but also improves readability.

  *

  We can create RAML fragments with such code and then include them in main RAML project using !include like:

  types:

  Book: !include bookDataType.raml and

  examples:

  input: !include bookExample.raml

  *

  Additionally for

  ------------------------------------------------------------------------------------------------------------------------- ---------------

  Correct Answer: D

  Reference: INCLUDES section under https://medium.com/raml-api/raml-101-libraries-and-datatypes-fragments-1889b2e82c27

• Question 175:

  A web client submits a request to http://localhost:8081/books/0471767840. The value "0471767840" is captured by a Set Variable transformer to a variable named booklSBN.

  What is the DataWeave expression to access booklSBN later in the flow?

  A. booklSBN
  B. attributes.booklSBN
  C. flowVars.booklSBN
  D. vars. booklSBN
  D. vars. booklSBN

• Question 176:

  Refer to the exhibits.

  A web client sends a GET request to the HTTP Listener.

  What response message is returned to the web client?

  

  A. ""
  B. "End"
  C. "Start"
  D. "String is not blank"
  B. "End"

  ---

  Explanation/Reference:

  1.

  Set Payload "Start"

  2.

  'Is Balnk String' Creates an Error object with #[error.description] ="String is not blank"

  3.

  Default Error Handler catches and Propagates error

  4.

  'On Error Propogate' is 'RED IN RED OUT'. It Returns Status Code : 500 and #[error.description]

  Correct answer is String is not blank. Because validation component will throw an error as payload is not blank.

  

• Question 177:

  Which of the module is imported automatically in Dataweave scripts?

  A. dw::core
  B. dw::System
  C. dw::Runtime
  D. dw::Crypto
  A. dw::core

  ---

  Explanation/Reference:

  Core (dw::Core) This module contains core DataWeave functions for data transformations. It is automatically imported into any DataWeave script.

• Question 178:

  Refer to the exhibit.

  

  What Database expression transforms the input to the output? A)

  

  B)

  

  C)

  

  D)

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  D. Option D

  ---

  Explanation/Reference:

  This kind of questions are best solved with filtering technique. Key thing to note here is XML attributes are always access by @ notation. So in this example orderId can be accessed as @OrderId which makes option 3 and option 4 false. Now difference in optin and option 2 is in mapping of lineItemPrice. Correct syntax to format a String in Numbse is value.price as Number. Hence option 2 is correct

• Question 179:

  Refer to the payload.

  

  The Set payload transformer sets the payload to an object. The logger component's message attribute is configured with the string "Result #["INFO"++ payload]"

  What is the output of logger when this flow executes?

  A. Result INFOpayload
  B. Result INFO{"student":{"name":"Anay","age":6}}
  C. 1. 1. "You called the function '++' with these arguments: 2. 2. 1: String ("INFO") 3. 3: Object ({student: {name: "Anay" as String {class: "java.lang.String"},age: 6 as Numbe...)
  D. Error : You evaluated inline expression # without ++
  C. 1. 1. "You called the function '++' with these arguments: 2. 2. 1: String ("INFO") 3. 3: Object ({student: {name: "Anay" as String {class: "java.lang.String"},age: 6 as Numbe...)

  ---

  Explanation/Reference:

  Correct answer is as below as concatenation operation works only with string and not with the objects. In this case payload is object. "You called the function '++' with these arguments:

  1: String ("INFO")

  2: Object ({student: {name: "Anay" as String {class: "java.lang.String"},age

• Question 180:

  Refer to the exhibits.

  

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

  A. 1. 1. trains: 2. 2. conductorIds map ((engId, index) -> 3. 3. train: { 4. 4. engineerId: engId 5. 5. } 6. 6. )
  B. 1. 1. { trains: 2. 2. 3. 3. conductorIds map ((engId, index) -> 4. 4. train: { 5. 5. engineerId: engId 6. 6. } 7. 7. ) 8. 8. }
  C. 1. 1. trains: 2. 2. {( 3. 3. conductorIds map ((engId, index) -> 4. 4. train: { 5. 5. engineerId: engId 6. 6. } 7. 7. ) 8. 8. )}
  D. 1. 1. {( trains: 2. 2. 3. 3. conductorIds map ((engId, index) -> 4. 4. train: { 5. 5. engineerId: engId 6. 6. } 7. 7. ) 8. 8. )}
  C. 1. 1. trains: 2. 2. {( 3. 3. conductorIds map ((engId, index) -> 4. 4. train: { 5. 5. engineerId: engId 6. 6. } 7. 7. ) 8. 8. )}

  ---

  Explanation/Reference:

  Points to remember:

  *

  XML must have a root element.

  *

  XML only allows one root element

  *

  To avoid multiple root issues, you must create a root element for the XML output, whenever we transform output

  *

  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

  *

  The transformation to XML would fail if the above mentioned considerations were not taken into account.

  *

  Thus the transformation script declares a root element as trains and wraps the data in "{( )}".

  Whenever you see such type of question, always look out for root element followed by {( )} wrapping map.

  I call this a "Wrap The Map" scenario. Hope it would help you remember !