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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q115-Q120):

NEW QUESTION # 115
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

Answer: A

NEW QUESTION # 116
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?

A. [1, 2, 3, 5]
B. [1,2, 3, 4, 5, 4, 4]
C. [1, 2, 3, 4, 5, 4]
D. [1, 2, 3, 4, 4, 5, 4]

Answer: D

NEW QUESTION # 117
Which statement accurately describes the behavior of the async /swait keywords?

A. The associated class contains some asynchronous functions.
B. The associated function will always return a promise.
C. The associated function sometimes returns a promise.
D. The associated function can only be called via asynchronous methods.

Answer: B

NEW QUESTION # 118
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 value of result when promise.race execues?

Answer:

Explanation:
Car2 completed the race.

NEW QUESTION # 119
Given the code below:

What is logged to the console'

A. 1 2 3 4 5
B. 2 5 1 3 4
C. 1 2 5 3 4
D. 2 5 3 4 1

Answer: D

NEW QUESTION # 120
......

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q115-Q120):

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