JavaScript-Developer-I Exam Question 1

The developer wants to test the array shown:
const arr = Array(5).fill(0)
Which two tests are the most accurate for this array ?
Choose 2 answers:
  • JavaScript-Developer-I Exam Question 2

    Refer to following code:
    class Vehicle {
    constructor(plate) {
    This.plate =plate;
    }
    }
    Class Truck extends Vehicle {
    constructor(plate, weight) {
    //Missing code
    This.weight = weight;
    }
    displayWeight() {
    console.log('The truck ${this.plate} has a weight of ${this.weight} lb.');}} Let myTruck = new Truck('123AB', 5000); myTruck.displayWeight(); Which statement should be added to line 09 for the code to display 'The truck 123AB has a weight of 5000lb.'?
  • JavaScript-Developer-I Exam Question 3

    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."?
  • JavaScript-Developer-I Exam Question 4

    Refer to the code below:
    01 let car1 = new promise((_, reject) =>
    02 setTimeout(reject, 2000, "Car 1 crashed in"));
    03 let car2 = new Promise(resolve => setTimeout(resolve, 1500, "Car 2
    completed"));
    04 let car3 = new Promise(resolve => setTimeout (resolve, 3000, "Car 3
    Completed"));
    05 Promise.race([car1, car2, car3])
    06 .then(value => (
    07 let result = $(value) the race. `;
    08 ))
    09 .catch( arr => (
    10 console.log("Race is cancelled.", err);
    11 ));
    What is the value of result when Promise.race executes?
  • JavaScript-Developer-I Exam Question 5

    Refer to the code below:
    Let inArray =[ [ 1, 2 ] , [ 3, 4, 5 ] ];
    Which two statements result in the array [1, 2, 3, 4, 5] ?
    Choose 2 answers