Salesforce Salesforce Certifications JAVASCRIPT-DEVELOPER-I Questions & Answers

• Question 11:

  Given the code below:

  const delay = async delay =>{

  return new Promise((resolve,reject)=>{

  console.log(1);

  setTimeout(resolve,deleay);

  });

  };

  const callDelay =async ()=>{

  console.log(2);

  const yup = await delay(1000);

  console.log(3);

  }

  console.log(4);

  callDelay();

  console.log(5);

  What is logged to the console?

  A. 4 2 1 5 3

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 12:

  Given the HTML below:

  

  Which statement adds the priority-account css class to the Applied Shipping row?

  A. document.querySelector('#row-as').classList.add('priority-account');

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 13:

  Refer to the code below:

  let car1 = new Promise((_ ,reject)=> setTimeout(reject,2000,"Car1 crashed in"));

  let car2 = new Promise(resolve => setTimeout(resolve,1500,"Car2 completed"));

  let car3 = new Promise(resolve => setTimeout(resolve,3000,"Car3 completed"));

  Promise.race([car1,car2,car3])

  .then(value=>{

  let result = `${value} the race.`;

  }).catch(err=>{

  console.log('Race is cancelled.',err);

  });

  What is the valueof result when promise.race execues?

  A. Car2 completed the race.

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 14:

  Refer to the string below.

  Const str='Salesforce';

  Which two statementsresults in the word 'Sales'?

  A. Str.substring(0,5);

  B. Str.substr(0,5);

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: AB

• Question 15:

  CORRECT TEXT

  Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

  

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

• Question 16:

  Refer to the following code block:

  class Animal{

  constructor(name){

  this.name = name;

  }

  makeSound(){

  console.log(`${this.name} is making a sound.`)

  }

  }

  class Dog extends Animal{

  constructor(name){

  super(name)

  this.name = name;

  }

  makeSound(){

  console.log(`${this.name} is barking.`)

  }

  }

  let myDog = new Dog('Puppy');

  myDog.makeSound();

  What is the console output?

  A. Puppy is barking

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 17:

  Refer to the code below: Which replacement for the conditionalstatement on line 02 allows a developer to correctly determine that a specific element, myElement on the page had been clicked?

  

  A. event.target.id =='myElement'

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 18:

  CORRECT TEXT Refer the following code

  

  what is the value of array after code executes?

  A. 1,2,3,5

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 19:

  A developer has an is Dog function that takes one argument cat. They want to schedule the function to run everyminute. What is the correct syntax for scheduling this function?

  A. setInterval(isDog, 60000,'cat');

  B. PlaceHolder

  C. PlaceHolder

  D. PlaceHolder

  Correct Answer: A

• Question 20:

  Refer to the following code that performs a basic mathematical operation on a provided input:

  function calculate(num) {

  Return (num +10) / 3;

  }

  How should line 02 be written to ensure that x evaluates to 6 in the line below? Let x = calculate (8);

  A. Return Number((num +10) /3 );

  B. Return (Number (num +10 ) / 3;

  C. Return Integer(num +10) /3;

  D. Return Number(num + 10) / 3;

  Correct Answer: B