Salesforce JAVASCRIPT-DEVELOPER-I Online Practice Questions and Exam Preparation

Salesforce JAVASCRIPT-DEVELOPER-I Online Questions & Answers

• Question 161:

  A developer is leading the creation of a new web server for their team that will fulfill API requests from an existing client.

  The team wants a web server that runs on Node.Js, and they want to use the new web framework Minimalist.Js. The lead developer wants to advocate for a more seasoned back- end framework that already has a community around it.

  Which two frameworks could the lead developer advocate for?

  Choose 2 answers

  A. Gatsby
  B. Angular
  C. Express
  D. Koa
  B. Angular
  C. Express

• Question 162:

  Given the JavaScript below:

  

  Which code should replace the placeholder comment on line 05 to highlight accounts that match the search string'

  A. 'yellow' : null
  B. null : 'yellow'
  C. 'none1 : "yellow'
  D. 'yellow : 'none'
  D. 'yellow : 'none'

• Question 163:

  Refer to the following code:

  function test (val) {

  If (val === undefined) {

  return `Undefined values!' ;

  }

  if (val === null) {

  return `Null value! ';

  }

  return val;

  }

  Let x;

  test(x);

  What is returned by the function call on line 13?

  A. Undefined
  B. Line 13 throws an error.
  C. `Undefined values!'
  D. `Null value!'
  C. `Undefined values!'

• Question 164:

  Given the following code:

  

  What is the output of line 02?

  A. "null"
  B. "x-
  C. "undefined" 0
  D. 'object"
  D. 'object"

• Question 165:

  Cloud Kicks has a class to represent items for sale in an online store, as shown below:

  Class Item{

  constructor (name, price){

  this.name = name;

  this.price = price;

  }

  formattedPrice(){

  return `s' + String(this.price);}}

  A new business requirement comes in that requests a ClothingItem class that should have all of the properties and methods of the Item class but will also have properties that are specific to clothes.

  Which line of code properly declares the clothingItem class such that it inherits from Item?

  A. Class ClothingItem implements Item{
  B. Class ClothingItem {
  C. Class ClothingItem super Item {
  D. Class ClothingItem extends Item {
  D. Class ClothingItem extends Item {

• Question 166:

  Refer to the code below?

  Let searchString = ` look forthis ';

  Which two options remove the whitespace from the beginning of searchString?

  Choose 2 answers

  A. searchString.trimEnd();
  B. searchString.trimStart();
  C. trimStart(searchString);
  D. searchString.replace(/*\s\s*/, `');
  B. searchString.trimStart();
  D. searchString.replace(/*\s\s*/, `');

• Question 167:

  In which situation should a developer include a try .. catch block around their function call ?

  A. The function has an error that should not be silenced.
  B. The function results in an out of memory issue.
  C. The function might raise a runtime error that needs to be handled.
  D. The function contains scheduled code.
  C. The function might raise a runtime error that needs to be handled.

• Question 168:

  Refer to the code below:

  console.log(`'start);

  Promise.resolve(`Success') .then(function(value){

  console.log(`Success');

  });

  console.log(`End');

  What is the output after the code executes successfully?

  A. End Start Success
  B. Start Success End
  C. Start End Success
  D. Success Start End
  C. Start End Success

• Question 169:

  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
  D. 2 5 3 4 1

• Question 170:

  Given the following code: What will be the first four numbers logged?

  

  A. 0012
  B. 0112
  C. 0122
  D. 0123
  B. 0112