Salesforce Salesforce Certifications JAVASCRIPT-DEVELOPER-I Questions & Answers

• Question 21:

  A test has a dependency on database. query. During the test, the dependency is replaced with an object called database with the method, Calculator query, that returns an array. The developer does not need to verify how many times the method has been called.

  Which two test approaches describe the requirement? Choose 2 answers

  A. White box

  B. Stubbing

  C. Black box

  D. Substitution

  Correct Answer: AD

• Question 22:

  Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?

  A. JSON.stringify and JSON.parse

  B. JSON.serialize and JSON.deserialize

  C. JSON.encode and JSON.decode

  D. JSON.parse and JSON.deserialize

  Correct Answer: A

• Question 23:

  A developer wants to define a function log to be used a few times on a single-file JavaScript script.

  01 // Line 1 replacement

  02 console.log('"LOG:', logInput);

  03 }

  Which two options can correctly replace line 01 and declare the function for use? Choose 2 answers

  A. function leg(logInput) {

  B. const log(loginInput) {

  C. const log = (logInput) => {

  D. function log = (logInput) {

  Correct Answer: AC

• Question 24:

  Refer to the following object.

  

  How can a developer access the fullName property for dog?

  A. Dog.fullName

  B. Dog.fullName ( )

  C. Dog, get, fullName

  D. Dog, function, fullName

  Correct Answer: A

• Question 25:

  A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints.

  The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In thesource code, the server, js file will start the server. the developer wants to debug the Node.js server only

  using the terminal.

  Which command can the developer use to open the CLI debugger in their current terminal window?

  A. node -i server.js

  B. node inspect server,js

  C. node server,js inspect

  D. node start inspect server,js

  Correct Answer: B

• Question 26:

  Refer to the code:

  

  Given the code above, which three properties are set for pet1? Choose 3 answers

  A. name

  B. owner

  C. type

  D. canTalk

  E. size

  Correct Answer: CDE

• Question 27:

  Given the code below:

  

  Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?

  A. console.group(usersList) ;

  B. console.table(usersList) ;

  C. console.info(usersList) ;

  D. console.groupCol lapsed(usersList) ;

  Correct Answer: A

• Question 28:

  Given the code below: What is logged to the console'

  

  A. 1 2 3 4 5

  B. 1 2 5 3 4

  C. 2 5 1 3 4

  D. 2 5 3 4 1

  Correct Answer: D

• Question 29:

  Refer to code below:

  console.log(0);

  setTimeout(() => (

  console.log(1);

  });

  console.log(2);

  setTimeout(() => {

  console.log(3);

  ), 0);

  console.log(4);

  In which sequence will thenumbers be logged?

  A. 01234

  B. 02431

  C. 02413

  D. 13024

  Correct Answer: B

• Question 30:

  Given the following code:

  document.body.addEventListener(` click ', (event) => {

  if (/* CODE REPLACEMENT HERE */) {

  console.log(`button clicked!');

  )

  });

  Which replacement for the conditional statement on line 02 allows a developer to correctly determine that a button on page is clicked?

  A. Event.clicked

  B. e.nodeTarget==this

  C. event.target.nodeName == `BUTTON'

  D. button.addEventListener(`click')

  Correct Answer: C