Real Salesforce JavaScript-Developer-I Exam Questions [Updated 2023]
JavaScript-Developer-I Exam Dumps Pass with Updated 2023 Salesforce Certified JavaScript Developer I Exam
NEW QUESTION # 51
Refer to the code below:
for(let number =2 ; number <= 5 ; number += 1 ) {
// insert code statement here
}
The developer needs to insert a code statement in the location shown. The code
statement has these requirements:
1. Does require an import
2. Logs an error when the boolean statement evaluates to false
3. Works in both the browser and Node.js
Which meet the requirements?
- A. assert (number % 2 === 0);
- B. console.error(number % 2 === 0);
- C. console.assert(number % 2 === 0);
- D. console.debug(number % 2 === 0);
Answer: B
NEW QUESTION # 52
Refer to the code below:
When does promise. Finally on line 08 get called?
- A. When resolved
- B. When resolved and settled
- C. When resolved or rejected
- D. When rejected
Answer: C
NEW QUESTION # 53
Refer to the following code block:
What is the value of output after the code executes?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 54
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.'?
- A. super(plate);
- B. Super.plate =plate;
- C. Vehicle.plate = plate;
- D. This.plate =plate;
Answer: A
NEW QUESTION # 55
Refer to the code below:
Const searchTest = 'Yay! Salesforce is amazing!" ;
Let result1 = searchText.search(/sales/i);
Let result 21 = searchText.search(/sales/i);
console.log(result1);
console.log(result2);
After running this code, which result is displayed on the console?
- A. > 5 >undefined
- B. > 5 > 0
- C. > 5 > -1
- D. > true > false
Answer: A
Explanation:
NEW QUESTION # 56
Refer to the code below:
const event = new CustomEvent(
//Missing Code
);
obj.dispatchEvent(event);
A developer needs to dispatch a custom event called update to send information about
recordId.
Which two options could a developer insert at the placeholder in line 02 to achieve this?
Choose 2 answers
- A. 'Update' , (
recordId : '123abc'
( - B. 'Update' , '123abc'
- C. { type : 'update', recordId : '123abc' }
- D. 'Update' , {
Details : {
recordId : '123abc'
Answer: A,D
Explanation:
}
}
NEW QUESTION # 57
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as [1, 2]?
Choose 3 answer
- A. let x = arr. slice (2);
- B. let x = arr.filter ((a) => 2 }) ;
- C. let x =arr.splice(0, 2);
- D. let x arr.filter((a) => (return a <= 2 });
- E. let x = arr. slice (0, 2);
Answer: C,D,E
NEW QUESTION # 58
Refer to the code below:
let o = {
get js() {
let city1 = String("st. Louis");
let city2 = String(" New York");
return {
firstCity: city1.toLowerCase(),
secondCity: city2.toLowerCase(),
}
}
}
What value can a developer expect when referencing o.js.secondCity?
- A. An error
- B. ' New York '
- C. Undefined
- D. ' new york '
Answer: D
NEW QUESTION # 59
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as (3, 4, 5)?
Choose 3 answers
- A. Let x = arr.filter( (a) => ( a < 2)) ;
- B. Let x = arr.alice (2) ;
- C. Let x = arr.filter( (a) => )return a > 2 )) ;
- D. Let x = arr. Slince (2, 3);
- E. Let x = arr.aplice (2, 3);
Answer: B,C,E
NEW QUESTION # 60
A developer is trying to convince management that their team will benefit from using Node.JS for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager?
Which three benefits of Node.js can the developer use to persuade their manager?
- A. Installs with its own package manager to install and manage third-party libraries.
- B. Ensure stability with one major release every few years.
- C. Executes server-side JavaScript code to avoid learning a new language.
- D. Performs a static analysis can code before execution to look for runtime errors.
- E. Uses non-blocking functionality for performant request handling
Answer: D
NEW QUESTION # 61
Refer to the code below:
function foo () {
const a =2;
function bat() {
console.log(a);
}
return bar;
}
Why does the function bar have access to variable a ?
- A. Outer function's scope
- B. Inner function's scope
- C. Hoisting
- D. Prototype chain
Answer: A
NEW QUESTION # 62
Refer to the following code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers
- A. const foo = () => { return 'foo' ; }
const bar = () => { return 'bar' ; }
export { bar, foo } - B. const foo = () => { return 'foo';}
const bar = () => {return 'bar'; }
Export default foo, bar; - C. // FooUtils.js and BarUtils.js exist
Import (foo) from '/path/FooUtils.js';
Import (boo) from ' /path/NarUtils.js'; - D. Export default class {
foo() { return 'foo' ; }
bar() { return 'bar' ; }
}
Answer: A,D
NEW QUESTION # 63
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 # 64
Refer to the code below:
Function changeValue(obj) {
Obj.value = obj.value/2;
}
Const objA = (value: 10);
Const objB = objA;
changeValue(objB);
Const result = objA.value;
What is the value of result after the code executes?
- A. 0
- B. Undefined
- C. 1
- D. Nan
Answer: C
NEW QUESTION # 65
Refer to the following code:
Which two statement could be inserted at line 17 to enable the function call on line 18?
Choose 2 answers
- A. Object.assign (leo. Tiger);
- B. Object.assign (leo, tony);
- C. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
- D. leo.roar = () => { console.log('They\'re pretty good!'); );
Answer: B,D
NEW QUESTION # 66
Which code statement correctly retrieves and return an object from localStorage?
A)
B)
C)
D)
- A. Option D
- B. Option C
- C. Option B
- D. Option A
Answer: A
NEW QUESTION # 67
A developer publishes a new version of a package with new feature that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning format, what should the new package version number be?
- A. 1.1.4
- B. 2.0.0
- C. 1.2.0
- D. 1.2.3
Answer: C
NEW QUESTION # 68
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information the developer has, which code logs an error at boost with an event?
- A. Server.on ('error', (error) => {
console.log('ERROR', error);
}); - B. Try{
server.start();
} catch(error) {
console.log('ERROR', error);
} - C. Server.error ((server) => {
console.log('ERROR', error);
}); - D. Server.catch ((server) => {
console.log('ERROR', error);
});
Answer: A
NEW QUESTION # 69
Given the JavaScript below:
01 function filterDOM (searchString) {
02 const parsedSearchString = searchString && searchString.toLowerCase() ;
03 document.quesrySelectorAll(' .account' ) . forEach(account => (
04 const accountName = account.innerHTML.toLOwerCase();
05 account. Style.display = accountName.includes(parsedSearchString) ? /*Insert
code*/;
06 )};
07 }
Which code should replace the placeholder comment on line 05 to hide accounts that do
not match the search string?
- A. ' name ' : ' block '
- B. ' Block ' : ' none '
- C. ' hidden ' : ' visible '
- D. ' visible ' : ' hidden '
Answer: B
NEW QUESTION # 70
......
Average Salary for Salesforce JavaScript-Developer-I Exam Certified Professional
Salesforce JavaScript Developer roles are in great demand nowadays. The average salaries of Salesforce JavaScript Developer I exam Certified professional in:
- United State - 129,630 USD
- Europe - 63,500 Euro
- England - 60,200 POUND
The benefits of passing the Salesforce JavaScript-Developer-I exam are numerous. First and foremost, it demonstrates that the individual has a deep understanding of the Salesforce platform and can develop custom applications using JavaScript. Salesforce Certified JavaScript Developer I Exam certification can also lead to career advancement opportunities and increased earning potential. Additionally, it provides access to a community of certified professionals who can provide support and guidance in the field.
Salesforce JavaScript-Developer-I Certification Exam is designed to evaluate the skills and knowledge of developers who work with JavaScript in the Salesforce platform. Salesforce Certified JavaScript Developer I Exam certification is intended for individuals who are responsible for designing, developing, and deploying custom solutions in Salesforce using JavaScript. JavaScript-Developer-I exam is an excellent opportunity for developers to demonstrate their expertise and advance their careers in the Salesforce ecosystem.
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