Free Practice Salesforce Javascript-Developer-I Exam Questions 2025

Stay ahead with 100% Free Salesforce Certified JavaScript Developer I (WI25) Javascript-Developer-I Dumps Practice Questions

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Total 217 Questions | Updated On: Jun 03, 2025

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Question 1

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 : 10

B : Nan

C : 5

D : Undefined

Answer: C

Question 2

A developer is leading the creation of a new browser application that will serve a single

page application. The team wants to use a new web framework Minimalsit.js. The Lead

developer wants to advocate for a more seasoned web framework that already has a

community around it.

Which two frameworks should the lead developer advocate for?

Choose 2 answers

A : Vue

B : Angular

C : Koa

D : Express

Answer: B,D

Question 3

A developer is working on an ecommerce website where the delivery date is dynamically

calculated based on the current day. The code line below is responsible for this calculation.

Const deliveryDate = new Date ();

Due to changes in the business requirements, the delivery date must now be today's

date + 9 days.

Which code meets this new requirement?

A : deliveryDate.setDate(( new Date ( )).getDate () +9);

B : deliveryDate.setDate( Date.current () + 9);

C : deliveryDate.date = new Date(+9) ;

D : deliveryDate.date = Date.current () + 9;

Answer: A

Question 4

Which javascript methods can be used to serialize an object into a string and deserialize

a JSON string into an object, respectively?

A : JSON.stringify and JSON.parse

B : JSON.serialize and JSON.deserialize

C : JSON.encode and JSON.decode

D : JSON.parse and JSON.deserialize

Answer: A

Question 5

Refer to the expression below:

Let x = ('1' + 2) == (6 * 2);

How should this expression be modified to ensure that evaluates to false?

A : Let x = ('1' + ' 2') == ( 6 * 2);

B : Let x = ('1' + 2) == ( 6 * 2);

C : Let x = (1 + 2) == ( '6' / 2);

D : Let x = (1 + 2 ) == ( 6 / 2);

Answer: B

Page: 1 / 44

Total 217 Questions | Updated On: Jun 03, 2025

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