Confidently Practice Online with Free Javascript-Developer-I Exam Cram

Practice your Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) certification test with free Javascript-Developer-I exam cram and take control of your certification preparation. At FreeExamCram, you can practice online for free using real Javascript-Developer-I exam dumps, verified questions, and expert-designed free online practice tests. Moreover our Salesforce Javascript-Developer-I exam cram backed by our confidence-boosting refund guarantee.

Question 1

Given the code below:

const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]);

What is the value of copy?

Options :

A : -- [ \''false\'' , { } ]--

B : -- [ false, { } ]--

C : -- [ \''false\'' , false, undefined ]--

D : -- [ \''false\'' ,false, null ]--

Answer: D

Question 2

Given two expressions var1 and var2. What are two valid ways to return the logical AND

of the two expressions and ensure it is data type Boolean ?

Choose 2 answers:

Options :

A : Boolean(var1 && var2)

B : var1 && var2

C : var1.toBoolean() && var2toBoolean()

D : Boolean(var1) && Boolean(var2)

Answer: A,D

Question 3

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

a JSON string into an object, respectively?

Options :

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 4

A developer creates a class that represents a blog post based on the requirement that a

Post should have a body author and view count.

The Code shown Below:

Class Post {

// Insert code here

This.body =body

This.author = author;

this.viewCount = viewCount;

}

Which statement should be inserted in the placeholder on line 02 to allow for a variable to be set

to a new instanceof a Post with the three attributes correctly populated?

Options :

A : super (body, author, viewCount) {

B : Function Post (body, author, viewCount) {

C : constructor (body, author, viewCount) {

D : constructor() {

Answer: C

Question 5

Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

Options :

A : 'London'

B : undefined

C : An error

D : 'NaN'

Answer: D