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Salesforce JavaScript-Developer-I Exam With Confidence Using Practice Dumps

Exam Code:
JavaScript-Developer-I
Exam Name:
Salesforce Certified JavaScript Developer I (WI25)
Certification:
Salesforce Developer
Vendor:
Salesforce
Questions:
215
Last Updated:
Apr 19, 2025
Exam Status:
Stable
Salesforce JavaScript-Developer-I

JavaScript-Developer-I: Salesforce Developer Exam 2025 Study Guide Pdf and Test Engine

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Salesforce Certified JavaScript Developer I (WI25) Questions and Answers

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Question 1

A developer is wondering whether to use, Promise.then or Promise.catch, especially

when a Promise throws an error?

Which two promises are rejected?

Which 2 are correct?

Options:

A.

Promise.reject(‘cool error here’).then(error => console.error(error));

B.

Promise.reject(‘cool error here’).catch(error => console.error(error));

C.

New Promise((resolve, reject) => (throw ‘cool error here’}).catch(error =>

console.error(error)) ;

D.

New Promise(() => (throw ‘cool error here’}).then(null, error => console.error(error)));

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Question 2

A test has a dependency on database.query. During the test the dependency is replaced

with an object called database with the method, query, that returns an array. The

developer needs to verify how many times the method was called and the arguments

used each time.

Which two test approaches describe the requirement?

Choose 2 answers

Options:

A.

Integration

B.

Black box

C.

White box

D.

Mocking

Question 3

A developer wants to iterate through an array of objects and count the objects and count

the objects whose property value, name, starts with the letter N.

Const arrObj = [{“name” : “Zach”} , {“name” : “Kate”},{“name” : “Alise”},{“name” : “Bob”},{“name” :

“Natham”},{“name” : “nathaniel”}

Refer to the code snippet below:

01 arrObj.reduce(( acc, curr) => {

02 //missing line 02

02 //missing line 03

04 ). 0);

Which missing lines 02 and 03 return the correct count?

Options:

A.

Const sum = curr.startsWith(‘N’) ? 1: 0;

Return acc +sum

B.

Const sum = curr.name.startsWith(‘N’) ? 1: 0;

Return acc +sum

C.

Const sum = curr.startsWIth(‘N’) ? 1: 0;

Return curr+ sum

D.

Const sum = curr.name.startsWIth(‘N’) ? 1: 0;

Return curr+ sum

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