Salesforce Salesforce Certifications JAVASCRIPT-DEVELOPER-I Questions & Answers

• Question 111:

  Refer to the code below:

  function changeValue(param) {

  Param =5;

  }

  Let a =10;

  Let b =5;

  changeValue(b);

  Const result = a+ " - "+ b;

  What is the value of result when code executes?

  A. 10 -10

  B. 5 -5

  C. 5 - 10

  D. 10 - 5

  Correct Answer: A

• Question 112:

  Refer to the HTML below:

  • Leo
  • Tony
  • Tiger

  Which JavaScript statement results in changing " Tony" to "Mr. T."?

  A. document.querySelectorAll(`$main $TONY').innerHTML = ' Mr. T. ';

  B. document.querySelector(`$main li:second-child').innerHTML = ' Mr. T. ';

  C. document.querySelector(`$main li.Tony').innerHTML = ' Mr. T. ';

  D. document.querySelector(`$main li:nth-child(2)'),innerHTML = ' Mr. T. ';

  Correct Answer: D

• Question 113:

  Which statement parses successfully?

  A. JSON. parse (""foo"');

  B. JSON.parse (""foo'");

  C. JSON.parse ("foo");

  D. JSON.parse ("foo");

  Correct Answer: A

• Question 114:

  Which statement accurately describes an aspect of promises?

  A. Arguments for the callback function passed to .then() are optional.

  B. In a.then()function, returning results is not necessary since callbacks will catch the result of a previous promise.

  C. .then() cannot be added after a catch.

  D. .then() manipulates and returns the original promise.

  Correct Answer: A

• Question 115:

  Refer to HTML below:

  The current status of an Order: In Progress

  . Which JavaScript statement changes thetext `In Progress' to `Completed' ?

  A.

  document.getElementById("status").Value = 'Completed' ;

  B.

  document.getElementById("#status").innerHTML = 'Completed' ;

  C.

  document.getElementById("status").innerHTML = 'Completed' ;

  D.

  document.getElementById(".status").innerHTML = 'Completed' ;

  Correct Answer: C

• Question 116:

  A developer wants to use a module named universalContainersLib and then call functions from it.

  How should a developer import every function from the module and then call the functions foo and bar?

  A. import * from '/path/universalContainersLib.js'; universalContainersLib. foo ()7 universalContainersLib.bar ();

  B. import {foo,bar} from '/path/universalCcontainersLib.js'; foo(): bar()?

  C. import all from '/path/universalContainersLib.js'; universalContainersLib.foo(); universalContainersLib.bar ();

  D. import * as lib from '/path/universalContainersLib.js'; lib.foo(); lib. bar ();

  Correct Answer: D

• Question 117:

  Refer to the code below:

  Async funct on functionUnderTest(isOK) {

  If (isOK) return `OK' ;

  Throw new Error(`not OK');

  )

  Which assertion accurately tests the above code?

  A. Console.assert (await functionUnderTest(true), ` OK ')

  B. Console.assert (await functionUnderTest(true), ` not OK ')

  C. Console.assert (awaitfunctionUnderTest(true), ` not OK ')

  D. Console.assert (await functionUnderTest(true), `OK')

  Correct Answer: D

• Question 118:

  Refer to code below:

  Let productSKU = `8675309' ;

  A developer has a requirement to generate SKU numbers that are always 19 characters lon,

  starting with `sku', and padded with zeros.

  Which statement assigns the values sku0000000008675309 ?

  A. productSKU = productSKU .padStart (19. `0').padstart(`sku');

  B. productSKU = productSKU .padEnd (16. `0').padstart(`sku');

  C. productSKU = productSKU .padEnd (16. `0').padstart(19, `sku');

  D. productSKU = productSKU .padStart (16. `0').padstart(19, `sku');

  Correct Answer: D

• Question 119:

  A developer wrote the following code to test a sum3 function that takes in anarray of numbers and returns the sum of the first three numbers in the array, and the test passes.

  A different developer made changes to the behavior of sum3 to instead sum only the first two numbers present in the array.

  

  Which two results occur when running this test on the updated sum3 function? Choose 2 answers

  A. The line 05 assertion passes.

  B. The line 02 assertion passes.

  C. The line 02 assertion fails.

  D. The line 05 assertion fails.

  Correct Answer: BD

• Question 120:

  Refer to the code below:

  Const resolveAfterMilliseconds = (ms) => Promise.resolve (

  setTimeout ((=> console.log(ms), ms ));

  Const aPromise = await resolveAfterMilliseconds(500);

  Const bPromise = await resolveAfterMilliseconds(500);

  Await aPromise, wait bPromise;

  What is the result of running line 05?

  A. aPromise and bPromise run sequentially.

  B. Neither aPromise or bPromise runs.

  C. aPromise and bPromise run in parallel.

  D. Only aPromise runs.

  Correct Answer: B