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[General] Test JS-Dev-101 Prep & JS-Dev-101 Book Free

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【General】 Test JS-Dev-101 Prep & JS-Dev-101 Book Free

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q151-Q156):NEW QUESTION # 151
Refer to the HTML below:
<div id="main">
<ul>
<li>Leo</li>
<li>Tony</li>
<li>Tiger</li>
</ul>
</div>
Which JavaScript statement results in changing " Tony" to "Mr. T."?
  • A. document.querySelector('$main li.Tony').innerHTML = ' Mr. T. ';
  • B. document.querySelector('$main li:second-child').innerHTML = ' Mr. T. ';
  • C. document.querySelectorAll('$main $TONY').innerHTML = ' Mr. T. ';
  • D. document.querySelector('$main li:nth-child(2)'),innerHTML =' Mr. T. ';
Answer: D

NEW QUESTION # 152
Refer to the code below:
const car = {
price:100,
getPrice:function(){
return this.price;
}
};
const customCar = Object.create(car);
customCar.price = 70;
delete customCar.price;const result = customCar.getPrice();
Whatis the value of result after the code executes?
  • A. 0
  • B. undefined
  • C. null
  • D. 1
Answer: D

NEW QUESTION # 153
Refer to the code below:
Let car1 = new Promise((_ , reject) =>
setTimeout(reject, 2000, "car 1 crashed in" =>
Let car2 =new Promise(resolve => setTimeout(resolve, 1500, "car 2 completed") Let car3 =new Promise(resolve =>setTimeout(resolve, 3000, "car 3 completed") Promise.race(( car1, car2, car3))
.then (value => (
Let result = '$(value) the race.';)}
.catch(arr => {
console.log("Race is cancelled.", err);
});
What is the value of result when Promise.race executes?
  • A. Car 1 crashed in the race.
  • B. Car3 completes the race
  • C. Race is cancelled.
  • D. Car 2 completed the race.
Answer: D

NEW QUESTION # 154
Given the following code:
What is the output of line 02?
  • A. "undefined" 0
  • B. "x-
  • C. 'object"
  • D. "null"
Answer: C

NEW QUESTION # 155
Given the JavaScript below:

Which code should replace the placeholder comment on line 05 to highlight accounts that match the search string'
  • A. 'none1 : "yellow'
  • B. 'yellow : 'none'
  • C. 'yellow' : null
  • D. null : 'yellow'
Answer: B

NEW QUESTION # 156
......
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